Technical Information

MP1 Axial Piston Pumps
Size 28/32, 38/45

www.danfoss.com

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45

Revision history

2 | © Danfoss | June 2024

Table of revisions
Date

ChangedRev

June 2024

Corrected dimensions for 28/32 in Auxiliary mounting drawing section

0603

March 2024

Typo

0602

February 2024

Corrected 15 teeth shaft spline class

0601

January 2024

Added MDC response time

0509

October 2023

Minor correction onto NFPE control

0508

October 2023

Typo

0507

October 2023

Minor correction onto some drawings in Controls section.

0506

July 2022

Added missing loop flushing valve sectional drawing and performance graph0505

May 2022

Minor update onto 28/32 dimensions with speed sensor

0504

February 2022

Added option A3 endcap option to 38/45cc

0503

January 2022

Corrected the number of charge pressure in operating parameters0502

December 2021

Added HDC control options

0501

April 2021

Corrected interface with ECU (EDC) graphic

0407

2017 - 2020

Various changes

0102 - 0406

August 2016

First Edition

0101

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Contents
General description
Overview..............................................................................................................................................................................................6
Features................................................................................................................................................................................................6
System diagram................................................................................................................................................................................ 7
Schematic............................................................................................................................................................................................8
Technical specifications
Design specifications...................................................................................................................................................................... 9Technical data....................................................................................................................................................................................9
Operating parameters..................................................................................................................................................................10
Fluid specifications........................................................................................................................................................................10
Operation
High Pressure Relief Valve (HPRV) and charge checkHPRV and charge check........................................................ 11
Bypass function...............................................................................................................................................................................11
Charge Pressure Relief Valve (CPRV)CPRV function...........................................................................................................12
Loop flushing valve....................................................................................................................................................................... 13
Electrical displacement control (EDC).................................................................................................................................... 14
EDC principle..............................................................................................................................................................................14
EDC operation............................................................................................................................................................................14
Control signal requirements, EDC MP1............................................................................................................................ 15
EDC solenoid data.................................................................................................................................................................... 15
Control response.......................................................................................................................................................................16
EDC response time..............................................................................................................................................................16
Manual override (MOR)...........................................................................................................................................................16
Hydraulic displacement control (HDC).................................................................................................................................. 18
HDC principle............................................................................................................................................................................. 18
HDC operation........................................................................................................................................................................... 18
Hydraulic signal pressure range..........................................................................................................................................19
Pump output flow direction vs. control pressure......................................................................................................... 19
Control response.......................................................................................................................................................................19
Response time, HDC................................................................................................................................................................ 20
Swashplate angle sensor for EDC controls........................................................................................................................... 21
Swash plate angle sensor parameters (EDC).................................................................................................................. 21
Swash plate angle sensor connector.................................................................................................................................22
Interface with ECU (EDC)........................................................................................................................................................22
Manual displacement control (MDC)......................................................................................................................................22
MDC principle............................................................................................................................................................................ 22
MDC operation.......................................................................................................................................................................... 24
MDC shaft rotation...................................................................................................................................................................24
Control response.......................................................................................................................................................................25
MDC response time............................................................................................................................................................ 25
Neutral start switch (NSS)...................................................................................................................................................... 25
Case gauge port M14.............................................................................................................................................................. 26
Lever..............................................................................................................................................................................................27
Forward-neutral-reverse electic control (FNR).................................................................................................................... 27
FNR principle.............................................................................................................................................................................. 27
Control response.......................................................................................................................................................................29
Response time, FNR............................................................................................................................................................30
Non feedback proportional electric control (NFPE).......................................................................................................... 30
Control signal requirements.................................................................................................................................................31
Control response.......................................................................................................................................................................32
Response time...................................................................................................................................................................... 32
Non-feedback, proportional hydraulic control (NFPH).................................................................................................... 32
Control response.......................................................................................................................................................................33
Response time...................................................................................................................................................................... 34
Automotive control (AC)............................................................................................................................................................. 34
Control-cut-off valve (CCO valve).............................................................................................................................................37
CCO solenoid data....................................................................................................................................................................38
Brake gauge port with MDC................................................................................................................................................. 39© Danfoss | June 2024

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Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Contents
Displacement limiter.....................................................................................................................................................................39
Displacement change (approximate)................................................................................................................................39
Speed sensor................................................................................................................................................................................... 40
Temperature Range................................................................................................................................................................. 40
Output pulses.............................................................................................................................................................................40
Mating connectors................................................................................................................................................................... 40
Speed sensor 4.5 – 8 V............................................................................................................................................................ 40
Temperature Signal.......................................................................................................................................................................41
Operating parameters
Input speed...................................................................................................................................................................................... 42
System Pressure..............................................................................................................................................................................42
Charge pressure..............................................................................................................................................................................43
Charge pump inlet pressure...................................................................................................................................................... 43
Case pressure...................................................................................................................................................................................43
Temperature.................................................................................................................................................................................... 43
Viscosity.............................................................................................................................................................................................44
System design parameters
Filtration system ............................................................................................................................................................................ 45
Filtration............................................................................................................................................................................................ 45
Suction filtration....................................................................................................................................................................... 45
Charge pressure filtration......................................................................................................................................................46
Independent braking system.................................................................................................................................................... 47
Fluid selection................................................................................................................................................................................. 47
Reservoir............................................................................................................................................................................................47
Case drain......................................................................................................................................................................................... 47
Charge pump...................................................................................................................................................................................47
Charge pump sizing/selection.............................................................................................................................................48
Charge pump output flow..........................................................................................................................................................49
Bearing life and external shaft loading.................................................................................................................................. 49
Hydraulic unit life........................................................................................................................................................................... 51
Mounting flange loads.................................................................................................................................................................51
Shaft torques................................................................................................................................................................................... 53
Shaft selection........................................................................................................................................................................... 53
Shaft torque and splines lubrication................................................................................................................................. 53
Shaft torque for tapered shafts............................................................................................................................................53
Shaft availability and torque ratings.......................................................................................................................................54
Understanding and minimizing system noise.....................................................................................................................54
Sizing equations............................................................................................................................................................................. 56
Model code
Model code (A - B - C)................................................................................................................................................................... 57
Model code (D)................................................................................................................................................................................58
Model code (F)................................................................................................................................................................................ 59
Model code (H - J - T).................................................................................................................................................................... 60
Model code (K)................................................................................................................................................................................ 61
Model code (E - M - N - Z - L)...................................................................................................................................................... 62
Model code (V - G - W)..................................................................................................................................................................63
Model code (X - Y)..........................................................................................................................................................................65
Installation drawings
28/32 ports....................................................................................................................................................................................... 66
38/45 ports....................................................................................................................................................................................... 67
28/32 dimensions...........................................................................................................................................................................68
28/32 dimensions with speed sensor..................................................................................................................................... 70
38/45 dimensions...........................................................................................................................................................................71
38/45 dimensions with speed sensor..................................................................................................................................... 74
Input shafts: option G4, F6 (SAE B, 13 teeth)........................................................................................................................75
Input shafts: option G1, F1 (SAE B, 14 teeth)........................................................................................................................76
Input shafts: option G5, F5 (SAE B, 15 teeth)........................................................................................................................77
4 | © Danfoss | June 2024

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Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Contents
Input shafts: option A7, A9 (SAE B, straight key shaft)......................................................................................................78
Input shafts: option G6, G7 (SAE B, 19 teeth)....................................................................................................................... 79
Input shafts: option A6, A8 (SAE B, straight key shaft)......................................................................................................80
Input shafts: option F2, F3 (SAE B, taper key shaft) ...........................................................................................................81
Tapered shaft customer acknowledgement...................................................................................................................81
Auxiliary mounting: option A16, B16, C16, D16, E16, F16 (SAE A, 9 teeth)............................................................... 82
Auxiliary mounting: option A19, B19, C19, D19, E19, F19 (SAE A, 11 teeth).............................................................83
Auxiliary mounting: option A22, B22, C22, D22, E22, F22 (SAE B, 13 teeth)............................................................. 84
Auxiliary mounting: option A25, B25, C25, D25, E25, F25 (SAE B-B 15 teeth) ......................................................... 85
Controls
Electric displacement control (EDC)........................................................................................................................................86
Electric displacement control with CCO (EDC+CCO)........................................................................................................ 87
EDC with ASNSR........................................................................................................................................................................ 88
Hydraulic displacement control (HDC).................................................................................................................................. 89
Manual displacement control (MDC)......................................................................................................................................90
MDC with NSS option M2...................................................................................................................................................... 91
MDC with CCO options M3, M4...........................................................................................................................................92
MDC with NSS and CCO options M5, M6......................................................................................................................... 93
Forward-neutral-reverse (FNR)..................................................................................................................................................94
Non-feedback proportional electric (NFPE)......................................................................................................................... 95
Non-feedback proportional hydraulic (NFPH).....................................................................................................................96
Automotive control (AC)............................................................................................................................................................. 97
AC connectors dimensions................................................................................................................................................... 98
Filtration
Suction filtration: option S..........................................................................................................................................................99
Remote full flow charge pressure filtration: option R.................................................................................................... 100
External full flow charge pressure filtration: option E.................................................................................................... 101© Danfoss | June 2024

BC178386485160en-000603 | 5

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
General description
MP1 overview
The MP1 pump is a variable displacement axial piston pump intended for closed circuit medium power
applications. The swashplate motion is controlled via compact hydraulic servo control system. A varietyof controls are available. These include mechanic or electric actuated feedback controls, electric or
hydraulic actuated non-feedback type controls, and a three-position electric control.. These controls
feature low hysteresis and responsive performance.
MP1 features
Designed for quality and reliability

•
•
•
•

Uniform design concept across frame sizes
Single piece housing to minimize leaks
Technologically advanced kit and servo system
Predictable, low friction swashplate bearing for precise machine control

Machine integration benefits

•
•
•
•

Industry leading pump length
Clean side for easier machine integration
Metric and Inch O-ring boss and Split flange (38/45 only) system port interfaces
Standard connection interfaces

Greater total efficiency••

Increased pump efficiency
Lower control pressure for less power consumption

Control options

•
•
•
•
•
•
•
•

Electrical displacement control (EDC)
Manual displacement control (MDC)
Hydraulic displacement control (HDC)
Automotive control (AC-1, AC-2)
Forward-neutral-reverse (FNR)
Non-feedback proportional electric (NFPE)
Non-feedback proportional hydraulic (NFPH)
Common control across entire family

Expanded functionality•••

PLUS+1® Compliant control and options
Easy integration with Telematics
Integrated Flushing valve available

Modularity••

6 | © Danfoss | June 2024

Common control, charge pump and auxiliary pad options
Easy and quick conversion to the right configuration

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
General description
MP1 system diagram

1
4

3

5

2
10
8

9

6

MP1
Axial Piston
Pump

Fixed
Displacement
Motor

7

P400327

Servo Pressure

System High Pressure

System Low Pressure

Charge Pressure

Case Flow

Suction Flow

1. Control

2. Heat Exchanger

3. Heat Exchanger Bypass

4. Reservoir

5. Filter

6. Servo Piston

7. Check Valves with High Pressure
Relief Valves

8. Charge Relief Valve

9. Charge Pump

10. Case Drain

MP1 28/32© Danfoss | June 2024

MP1 38/45

BC178386485160en-000603 | 7

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
General description
MP1 schematic

Loop FlushingE

MDC with NSS

F

Suctionfiltration
Remotefiltration

M3 for 28/32

MDC

AM3

E

F

M3 for 38/45
L2

M14

M14

A
MA

Check
Reliefwith
Bypass
M5 M4

EDC

S

MB
B

L1

C1

C1

M14

M14

C2

C2

FNR

EDC with CCO

M14

C1

C1

M14

C2

X7

C2

NFPE

X1

M14

X2

HDC

8 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Technical specifications
MP1 design specifications
Features

MP1

DesignAxial piston pump with variable displacement using compact servo piston control.

Direction of input rotation

Clockwise or counterclockwise

Recommended installation position

Pump installation position is discretionary, however the recommended control position is
on the top or at the side with the top position preferred. If the pump is installed with thecontrol at the bottom, flushing flow must be provided through port M14 located on the
EDC, HDC, FNR, NFPE, NFPH, AC-1, AC-2 and MDC control. Vertical input shaft installation is
acceptable. The housing must always be filled with hydraulic fluid. Recommended
mounting for a multiple pump stack is to arrange the highest power flow towards the
input source. Consult Danfoss for non-conformance to these guidelines.

Filtration configuration

Suction or charge pressure filtration

MP1 technical data
Feature

28

32

38

45

Displacement (cm3/rev [in3/rev])28.0 [1.71]

31.8 [1.94]

38.0 [2.32]

45.1 [2.75]

Flow at rated (continuous) speed (l/min [US gal/min])95.3 [25.2]

108.1 [28.5]

125.3 [33.1]

149.5 [39.5]

Torque at maximum displacement (N•m/bar [lbf•in/1000psi])

0.45 [272.0]

0.51 [308.9]

0.60 [369.1]

0.72 [438.1]

Mass moment of inertia of rotating components (kg•m2 [slug•ft2])

0.0020 [0.0015]

0.0030 [0.0022]

Mass (kg [lb])29.6 [65.3]

38 [83.8]

Oil volume (liter [US gal])

1.5 [0.40]

2.0 [0.53]

Mounting flange

ISO 3019-1 flange 101-2 (SAE B)

Input shaft outer diameter, splines and tapered shafts

ISO 3019-1, outer Ø22mm - 4 (SAE B, 13 teeth)
ISO 3019-1, outer Ø25mm - 4 (SAE B-B, 15 teeth)

ISO 3019-1, outer Ø22mm - 1 (StraightKey)

Auxiliary mounting flange with metric fasteners, shaft outer diameterand splines

ISO 3019-1, outer Ø31mm - 4 (19 teeth)
ISO 3019-1, outer Ø25mm - 4 (StraightKey)
ISO 3019-1, outer Ø25mm -3 (Conicalkeyed, taper 1:8)

ISO 3019-1, flange 82-2, outer Ø16mm - 4 (SAE A, 9 teeth)
ISO 3019-1, flange 82-2, outer Ø19mm - 4 (SAE A, 11 teeth)
ISO 3019-1, flange 101-2, outer Ø22mm - 4 (SAE B, 13 teeth)
ISO 3019-1, flange 101-2, outer Ø25mm - 4 (SAE B-B, 15 teeth)
ISO 11926-1 - 1 1/16 - 12 (Inch O-ringboss)

Main port configuration A, B
ISO 6149-1, M27x2 (Metric o-ring boss)

ISO 11926-1 - 1 5/16 - 12 (Inch O-ringboss)
ISO 6162, Ø19mm, (Split flange boss,
M10x1.5)
ISO 6149-1 - M33x2 (Metric O-ringboss)

Case drain ports L1, L2

ISO 11926-1, 1 1/16 -12 (Inch O-ring boss)
ISO 6149-1, M27x2 (Metric O-ring boss)

Suction ports S

ISO 11926-1 - 1 1/16-12 (Inch O-ringboss)
ISO 6149-1 - M27x2 (Metric O-ringboss)

Other ports

ISO 11926-1, (Inch O-ring boss)
ISO 6149 -1, (Metric O-ring boss)

Customer interface threads

Metric fasteners© Danfoss | June 2024

ISO 11926-1 - 1 5/16-12 (Inch O-ringboss)
ISO 6149-1 - M33x2 (Metric O-ringboss)

BC178386485160en-000603 | 9

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Technical specifications
MP1 operating parameters
Features
Input speed

System pressure

Units
Minimum1

28/32

min-1 (rpm)

38/45

500

500

Rated

3400

3300

Maximum

4000

3900

350 [5000]

350 [5000]

Maximum pressure

Maximum working pressure

bar [psi]

380 [5429]

380 [5429]

Minimum low loop (above case)

10 [143]

10 [143]

Charge pressure (minimum)

bar [psi]

16 [232]

16 [232]

Charge pump inlet
pressurebar (absolute) [in Hg vacuum]

0.8 [6]

0.8 [6]

Minimum (cold start)

0.2 [24]0.2 [24]

Maximum

2.0

2.0

3 [43]

3 [43]

5 [71]

5 [71]

Case pressure

Minimum (continuous)

Rated

bar [psi]

Maximum
1 No load condition. Refer to System Design Parameters/Charge Pump for details.

MP1 fluid specifications
Features
Viscosity

Temperature range3

Filtration (recommended
minimum)Intermittent1

Units

28/32/38/45

mm2/sec. [ SUS]

5 [42]

Minimum

7 [49]

Recommended range

12 - 80 [66 - 370]

Maximum (cold start)2

1600 [7500]

Minimum (cold start)°C [°F]-40 [-40]

Recommended range

60 - 85 [140 - 185]

Maximum continuous

104 [220]

Maximum intermittent

115 [240]

Cleanliness per ISO 4406

22/18/13

Efficiency (charge pressure filtration)

β-ratio

Efficiency (suction filtration)
Recommended inlet screen mesh size

β15-20=75(β10≥10)β35-45=75(β10≥2)µm

100 - 125

1 Intermittent=Short term t <1 min per incident and not exceeding 2 % of duty cycle based load-life.
2 Cold start = Short term t < 3 min, p < 50 bar [725 psi], n < 1000 min-1 (rpm)3 At the hottest point, normally case drain port.

10 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
MP1 high pressure relief valve (HPRV) and charge check
All MP1 pumps are equipped with a combination high pressure relief and charge check valve. The highpressure relief function is a dissipative (with heat generation) pressure control valve for the purpose oflimiting excessive system pressures. The charge check function acts to replenish the low-pressure side of
the working loop with charge oil. Each side of the transmission loop has a dedicated HPRV valve that is
non-adjustable with a factory set pressure. When system pressure exceeds the factory setting of thevalve, oil is passed from the high pressure system loop, into the charge gallery, and into the low pressure
system loop via the charge check.
The pump order code allows for different pressure settings to be used at each system port. The systempressure order code for pumps with only HPRV is a reflection of the HPRV setting.
HPRV´s are factory set at a low flow condition. Any application or operating condition which leads toelevated HPRV flow will cause a pressure rise with flow above a valve setting. Consult factory for
application review. Excessive operation of the HPRV will generate heat in the closed loop and may cause
damage to the internal components of the pump.
Low Pressure

High PressureP400353

Bypass function
The bypass function allows a machine or load to be moved without rotating the pump shaft or prime
mover. The single pump HPRV valve also provides a loop bypass function when each of the two HPRV hex
plugs are mechanically backed out three full turns.
Engaging the bypass function mechanically connects both A & B sides of the working loop to thecommon charge gallery.
Possible damage to hydromotor(s).
Excessive speeds and extended load/vehicle movement must be avoided. The load or vehicle should be
moved not more than 20% of maximum speed and for a duration not exceeding 3 minutes. When thebypass function is no longer needed, care should be taken to re-seat the HPRV hex plugs to the normal
operating position.

© Danfoss | June 2024

BC178386485160en-000603 | 11

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
MP1 charge pressure relief valve (CPRV) function
An internal charge pressure relief valve (CPRV) regulates charge pressure within the hydraulic circuit. The
CPRV is a direct acting poppet valve that regulates charge pressure at a designated level above casepressure.
The charge pressure relief valve setting is specified within the model code of the pump. MP1 pumps withcharge pump have the CPRV set at 1800 rpm while MP1 pumps without charge pump have the CPRV set
with 18.9 l/min [5.0 US gal/min] of external supply flow. The charge pressure rise rate, with flow, isapproximately 1 bar/10 liter [5.4 psi/US gal].

Case Drain

Charge PressureP400341

12 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Loop flushing valve
MP1 pumps are available with an optional integral loop flushing. A loop flushing valve will remove heatand contaminants from the main loop at a rate faster than otherwise possible.
The MP1 loop flushing design is a simple spring centered shuttle spool with an orifice plug. The shuttle
shifts at approximately 3.9 bar [55.7 psi]. The flushing flow is a function of the low loop system pressure(charge) and the size of the plug.

Shuttle Spool

Orifice Plug

Working Loop (High Pressure)

Working Loop (Low Pressure)P400342

Loop flushing performance
Oil Temp = 50°C (~30 mm 2/S)

45

Charge pressure [d bar]

40
35
30
25

Ø1.6 (standard)Ø1.9 (optional)

20
15
10
5
0

0

2

4

6

8

Flow [lpm]

10

12

14
P400352

When a pump is used with an external loop flushing shuttle valve, ensure that the charge setting of thepump matches the setting of the loop flushing shuttle valve. Contact your Danfoss representative for theavailability of additional charge relief settings.

© Danfoss | June 2024

BC178386485160en-000603 | 13

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Electrical displacement control (EDC)
EDC principle
An EDC is a displacement (flow) control. Pump swashplate position is proportional to the input commandand therefore vehicle or load speed (excluding influence of efficiency), is dependent only on the prime
mover speed or motor displacement.
The Electrical Displacement Control (EDC) consists of a pair of proportional solenoids on each side of athree-position, four-way porting spool. The proportional solenoid applies a force input to the spool,which ports hydraulic pressure to either side of a double acting servo piston. Differential pressure acrossthe servo piston rotates the swashplate, changing the pump‘s displacement from full displacement in
one direction to full displacement in the opposite direction. Under some circumstances, such as
contamination, the control spool could stick and cause the pump to stay at some displacement.
A 170 μm screen is located in the supply line immediately before the control porting spool.
EDC control

P003 191

EDC schematic
M14
C1

C2

F00B

F00A
Feedback from
Swash plate

TP

P003 478E

EDC operation
EDC’s are current driven controls requiring a Pulse Width Modulated (PWM) signal. Pulse widthmodulation allows more precise control of current to the solenoids. The PWM signal causes the solenoid
pin to push against the porting spool, which pressurizes one end of the servo piston, while draining theother. Pressure differential across the servo piston moves the swashplate.
A swashplate feedback link, opposing control links, and a linear spring provide swashplate position force
feedback to the solenoid. The control system reaches equilibrium when the position of the swashplate
spring feedback force exactly balances the input command solenoid force from the operator. As
hydraulic pressures in the operating loop change with load, the control assembly and servo/swashplatesystem work constantly to maintain the commanded position of the swashplate.
14 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
The EDC incorporates a positive neutral deadband as a result of the control spool porting, preloads fromthe servo piston assembly, and the linear control spring. Once the neutral threshold current is reached,
the swashplate is positioned directly proportional to the control current. To minimize the effect of thecontrol neutral deadband, we recommend the transmission controller or operator input device
incorporate a jump up current to offset a portion of the neutral deadband.
The neutral position of the control spool does provide a positive preload pressure to each end of theservo piston assembly.
When the control input signal is either lost or removed, or if there is a loss of charge pressure, the springloaded servo piston will automatically return the pump to the neutral position.
Control signal requirements, EDC MP1
Pump displacement vs. control current

Displacement

100 %

-b

-a

"0"

a

Current mA

b

100 %

EDC control current
Voltage

12 VDC

Minimum current to stroke pump

24 VDCa*

640 mA

330 mAb

1640 mA

820 mA

Pin connections

any order* Factory test current, for vehicle movement or application actuation expect higher or lower value.

EDC solenoid data
Description

12 V

24 V

Maximum current

1800 mA

920 mA@ 20 °C [68 °F]

3.66 Ω

14.20 Ω

@ 80 °C [176 °F]

4.52 Ω

17.52 Ω

33 mH

140 mH

Nominal coil resistanceInductance
PWM signal frequency
IP RatingRange

70 – 200 Hz

Recommended*

100 HzIEC 60 529

IP 67

DIN 40 050, part 9

IP 69K with mating connector

Connector colorBlack* PWM signal required for optimum control performance.

© Danfoss | June 2024

BC178386485160en-000603 | 15

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Pump output flow direction vs. control signal
Shaft rotation

CW

Coil energized*

CCW

C1

C2

C1

C2

Port A

out

in

in

out

Port B

in

out

out

in

Servo port pressurized

M4

M5

M4

M5

* For coil location see Installation drawings.

Control response
MP1 controls are available with optional control passage orifices to assist in matching the rate of swashplate response to the application requirements (e.g. in the event of electrical failure).
The time required for the pump output flow to change from zero to full flow (acceleration) or full flow tozero (deceleration) is a net function of spool porting, orifices, and charge pressure.
A swash-plate response times table is available for each frame size. Testing should be conducted to verify
the proper orifice selection for the desired response. Typical response times at the following conditions:Δ p = 250 bar [3626 psi]
Charge pressure = 20 bar [290 psi]
Viscosity and temperature = 30 mm²/s [141 SUS] and 50 °C [122 °F]
Speed = 1800 min-1 (rpm)

MP1 EDC response time
Stroking direction

0.8 mm [0.03 in]orifice

1.0 mm [0.04 in]orifice

1.3 mm [0.05 in]orificeNo orifice

28/32

28/32

28/32

28/32

38/45

38/45

38/45

38/45

Neutral to full flow

1.3 s

2.1 s

0.9 s

1.3 s

0.6 s

0.9 s

0.4 s

0.6 s

Full flow to neutral

1.0 s

1.5 s

0.7 s

0.9 s

0.4 s

0.6 s

0.2 s

0.3 s

Manual override (MOR)
Initial actuation of the o-ring seal MOR plunger will require a force of 45 N. Additional actuations typicallyrequire less force to engage the MOR plunger. Proportional control of the pump via the MOR is notintended. The MOR plunger has a 4 mm diameter and must be manually depressed to be engaged.
Depressing the plunger mechanically moves the control spool which allows the pump to go on stroke.
Unintended MOR operation can cause the pump to go into stroke.
The vehicle or device must always be in a safe condition (example: vehicle lifted off the ground) whenusing the MOR function. The MOR should be engaged anticipating a full stroke response from the pump.
Refer to control flow table for the relationship of solenoid to direction of flow.

16 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
MOR and schematic

P003 204© Danfoss | June 2024

BC178386485160en-000603 | 17

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Hydraulic displacement control (HDC)
HDC principle
An HDC is a Hydraulic Displacement Control. Pump swashplate position is proportional to the input
command and therefore vehicle speed or load speed (excluding influence of efficiency), is dependent
only on the prime mover speed or motor displacement.
The HDC control uses a hydraulic input signal to operate a porting spool, which ports hydraulic pressure
to either side of a double acting servo piston. The hydraulic signal applies a force input to the spool
which ports hydraulic pressure to either side of a double acting servo piston. Differential pressure acrossthe servo piston rotates the swashplate, changing the pump’s displacement from full displacement in
one direction to full displacement in the opposite direction. Under some circumstances, such as
contamination, the porting spool could stick and cause the pump to stay at some displacement.
A serviceable 175 μm screen is located in the supply line immediately before the control porting spool.
HDC control

P400520

HDC schematic
M14

X1

F00B

Feedback from
Swashplate

X2

F00A

T

P
P400519

HDC operation
HDC’s are hydraulically driven control which ports hydraulic pressure to either side of a porting spool,which pressurizes one end of the servo piston, while draining the other end to case. Pressure differential
across the servo piston moves the swashplate.
A swashplate feedback link, opposing control linkage, and a linear spring provide swashplate position
force feedback to the hydraulic pressure. As hydraulic pressures in the operating loop change with load,
the control assembly and servo/swashplate system work constantly to maintain the commanded positionof the swashplate.

18 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
The HDC incorporates a positive neutral dead band as a result of the control spool porting, preloads fromthe servo piston assembly, and the linear control spring. Once the neutral threshold point is reached, theswashplate is positioned directly proportional to the control pressure.
When the control input is either lost or removed, or if there is a loss of charge pressure, the spring loaded
servo piston will automatically return the pump to the neutral position.
Pump displacement vs signal pressure
Displacement

100 %

-b

-a

"0"

Signal pressure

a

100 %

b

P102 031E

Hydraulic signal pressure range
OptionType

T1Standard

T2

Optiona*b*Max. pressure

4.2 bar16.2 bar

30 bar3 bar

11.6 bar

30 bar* Factory test current, for vehicle movement or application actuation expect a higher or lower value.

Pump output flow direction vs. control pressure
Shaft rotation HDC

Clockwise (CW) seen from shaft

Counter Clockwise (CCW) seen from shaft

Port energized

X1

X2

X1

X2

Port A

Out (high)In (low)

In (low)

Out (high)Port B

In (low)

Out (high)Out (high)In (low)

Servo port highpressure

M4

M5

M4

M5

For appropriate performance of HDC characteristic, keep the drain pressure of pilot valve to be equal orslightly higher than pump case pressure.
Control response
MP1 controls are available with optional control passage orifices to assist in matching the rate of swashplate response to the application requirements (e.g. in the event of electrical failure).
The time required for the pump output flow to change from zero to full flow (acceleration) or full flow tozero (deceleration) is a net function of spool porting, orifices, and charge pressure.
A swash-plate response times table is available for each frame size. Testing should be conducted to verify
the proper orifice selection for the desired response. Typical response times at the following conditions:Δ p = 250 bar [3626 psi]
Charge pressure = 20 bar [290 psi]
Viscosity and temperature = 30 mm²/s [141 SUS] and 50 °C [122 °F]
Speed = 1800 min-1 (rpm)© Danfoss | June 2024

BC178386485160en-000603 | 19

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Response time, HDC

20 | © Danfoss | June 2024

Stroking
direction

0.8 mm [0.03 in] orifice 1.0 mm [0.04 in] orifice 1.3 mm [0.05 in] orifice No orifice
28/32

38/45

28/32

38/45

28/32

38/45

28/32

38/45

Neutral tofull flow

1.3 s

2.1 s

0.9 s

1.3 s

0.6 s

0.9 s

0.3 s

0.6 s

Full flow to 1.0 s
neutral

1.5 s

0.7 s

0.9 s

0.4 s

0.6 s

0.2 s

0.3 s

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Swashplate angle sensor for EDC controls
The angle sensor detects the swash plate position with an accuracy dependent upon the calibration
effort done for the application and direction of rotation from the neutral position. At minimum the sensor
can be used for forward, neutral and reverse (FNR) detection.
The sensor works on the hall-effect technology. The implemented technology is based on ameasurement of the magnetic field direction in parallel to the chip surface. This field direction isconverted to a voltage signal at the output.
Enhanced calibration of the non-linear behavior leads to more exact calculation of the pump swashplateangle. The 4-pin DEUTSCH connector is part of the sensor housing. The swashplate angle sensor isavailable for all EDC controls for 12 V and 24 V.
Swashplate angle vs. output of supply voltage

Sensor output, % of supply voltage

100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
-18°

-13°

-8°

-3°

0°

2°

7°

12°

17°

Swashplate angle

W Warning
Strong magnetic fields in the proximity of the sensor can influence the sensor signal and must be
avoided.
Contact your Danfoss representative in case the angle sensor will be used for safety functions.
Swash plate angle sensor parameters (EDC)© Danfoss | June 2024

Parameter

Minimum

TypicalMaximum

Supply voltage range

4.5 VDC

5 VDC

5.5 VDC

Supply protection––

18 VDC

Pump neutral output (% of supply voltage)

–

50%

–

Working range (swash plate angle)

–18°

–

18°

Required supply current

–

–

30 mA

Output current signal

–

9 mA

11 mA

Working temperature–40 °C

80 °C

115 °CElectrical Protection

StandardClass

IP Rating

IEC 60 529

IP 67

DIN 40 050, part 9

IP 69K with mating connector

EMC Immunity

ISO 11452-2

100 V/m

BC178386485160en-000603 | 21

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Calibration of the sensor output within the software is mandatory. Vehicle neutral thresholds in thesoftware (±0.5°) are vehicle dependent and must consider different conditions, example: systemtemperature, system pressure and/or shaft speed.
For safety function: If the sensor fails (invalid signal <10% or >90% of supply voltage), it must be surethat the ECU will go into a diagnostic mode and shift into limited mode in order for the driver to take thefull control or the mechanical breaks should be activated. Strong magnetic fields in the proximity of thesensor can influence the sensor signal and must be avoided.
Swash plate angle sensor connector
Connector DEUTSCH, 4-pin

Pin assignment:

4

1

1. Ground (GND)
2. Not connected
3. Output signal 1 (SIG 1)
4. Supply (V+)

32

Connector order numbers
Description

Quantity

Order number

Mating connector DEUTSCH DTM06-4S-E004

111105824

Wedge lock WM-4S

1

Socket contact 0462-201-2031

3

Mating connector kit

1

not available
11212713

Interface with ECU (EDC)
Interface with ECU diagram

Supply100 nF
VCC

ECU

SignalOUT
100 nF

20 kΩ

GND

GND

Manual displacement control (MDC)
MDC principle
An MDC is a Manual proportional Displacement Control (MDC). The MDC consists of a handle on top of arotary input shaft. The shaft provides an eccentric connection to a feedback link. This link is connected on
its one end with a porting spool. On its other end the link is connected the pumps swashplate.
This design provides a travel feedback without spring. When turning the shaft the spool moves thus
providing hydraulic pressure to either side of a double acting servo piston of the pump.
Differential pressure across the servo piston rotates the swash plate, changing the pump’s displacement.
Simultaneously the swashplate movement is fed back to the control spool providing proportionality
between shaft rotation on the control and swashplate rotation.
22 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
The MDC changes the pump displacement between no flow and full flow into opposite directions. Under
some circumstances, such as contamination, the control spool could stick and cause the pump to stay atsome displacement.
A 170 μm screen is located in the supply line immediately before the control porting spool.
The MDC is sealed by means of a static O-ring between the actuation system and the control block. Its
shaft is sealed by means of a special O-ring which is applied for low friction. The special O-ring is
protected from dust, water and aggressive liquids or gases by means of a special lip seal.
Manual Displacement Control

P301 749

Pump displacement vs. control lever rotation

Displacement

100 %

"A"

-d -b

-a

-c

"0"

d

Lever rotation
a

100 %

bc

"B"

P301 752

MDC schematic diagram
M14

M5

M4

M3
P005 701

Where:
Deadband on B side – a = 3° ±1°
Maximum pump stroke – b = 30° +2/-1°© Danfoss | June 2024

BC178386485160en-000603 | 23

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Required customer end stop – c = 36° ±3°Internal end stop – d = 40°
MDC torque
Torque required to move handle to maximum displacement

1.4 N•m [12.39 lbf•in ]Torque required to hold handle at given displacement

0.6 N•m [5.31 lbf•in]Maximum allowable input torque

20 N•m [177 lbf•in]

MDC operation
The MDC provides a mechanical dead-band required to overcome the tolerances in the mechanicalactuation. The MDC contains an internal end stop to prevent turning the handle into any inappropriate
position.
The MDC provides a permanent restoring moment appropriate for turning the MDC input shaft back toneutral position only. This is required to take the backlash out of the mechanical connections between
the Bowden cable and the control.
High case pressure may cause excessive wear and the NSS to indicate that the control is not in neutral
position. In addition, if the case pressure exceeds 5 bar there is a risk of an insufficient restoring moment.
The MDC is designed for a maximum case pressure of 5 bar and a rated case pressure of 3 bar.

•••

Customers must install some support to limit the setting range of their Bowden cable to avoid anoverload of the MDC.
Customers can apply their own handle design but they must care about a robust clamping
connection between their handle and the control shaft and avoid overload of the shaft.
Customers can connect two MDC’s on a tandem unit in such a way that the actuation force will betransferred from the pilot control to the second control. The kinematic of the linkages must ensurethat either control shaft is protected from torque overload.

C Caution
Using the internal spring force on the input shaft is not an appropriate way to return the customer
connection linkage to neutral, or to force a Bowden cable or a joystick back to neutral position. It is notapplicable for any limitation of the Bowden cable stroke, except the applied torque to the shaft will neverexceed 20 N•m.
MDC shaft rotation

CCW

CW

Pump shaft rotation*

Clockwise (CW)MDC shaft rotation

CW

CCW

Port Ain (low)out (high)out (high)in (low)

Port Bout (high)in (low)in (low)out (high)Servo port high pressure

M5

M4

M5

M4

Counter-clockwise (CCW)CW

CCW* As seen from shaft side.

24 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Control response
MP1 controls are available with optional control passage orifices to assist in matching the rate of swashplate response to the application requirements (e.g. in the event of electrical failure).
The time required for the pump output flow to change from zero to full flow (acceleration) or full flow tozero (deceleration) is a net function of spool porting, orifices, and charge pressure.
A swash-plate response times table is available for each frame size. Testing should be conducted to verify
the proper orifice selection for the desired response. Typical response times at the following conditions:Δ p = 250 bar [3626 psi]
Charge pressure = 20 bar [290 psi]
Viscosity and temperature = 30 mm²/s [141 SUS] and 50 °C [122 °F]
Speed = 1800 min-1 (rpm)MP1 MDC response time
Code

Orifice description (mm)P

A

Stroking direction (sec)
B

Tank (A+B)

Neutral to full flow

Full flow to neutral

28/32

38/45

28/32

38/45

C1

–

0.8

0.8

–

1.3

1.8

0.9

1.2

C2

–

1.3

1.3

–

0.5

0.7

0.4

0.5

C3

–

–

–

–

0.3

0.3

0.3

0.3

C4

–

1.0

1.0

–

0.8

1.1

0.6

0.8

C6

–

–

–

1.0

0.5

1.0

0.5

0.7

C7

–

–

–

1.3

0.4

0.7

0.5

0.5

C8

0.8

–

–

0.6

1.5

2.6

1.4

1.9

C9

1.0

–

–

0.6

1.3

2.4

1.1

1.8

D1

1.0

–

–

0.8

0.9

1.6

0.8

1.1

D2

1.3

–

–

0.8

0.8

1.5

0.7

1.1

D3

1.3

–

–

1.0

0.6

1.1

0.6

0.8

D4

1.3

1.3

1.3

1.0

0.8

1.3

0.7

0.9

D5

0.6

0.8

0.8

0.6

3.2

4.0

2.0

2.9

E2

1.0

0.8

0.8

0.8

2.1

2.9

1.2

1.7

Neutral start switch (NSS)The Neutral Start Switch (NSS) contains an electrical switch that provides a signal of whether the control
is in neutral. The signal in neutral is Normally Closed (NC).

© Danfoss | June 2024

BC178386485160en-000603 | 25

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Neutral start switch schematic
M14

M5

M4

M3
P005 702

Neutral start switch data
Max. continuous current with switching

8.4 A

Max. continuous current without switching

20 A

Max. voltage

36 VDCElectrical protection class

IP67 / IP69K with mating connector

Case gauge port M14
The drain port should be used when the control is mounted on the unit’s bottom side to flush residual
contamination out of the control.
MDC w/h drain port shown
Case gauge port M14

P400344

26 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
MDC schematic diagram
M14

M5

M4

M3
P005 701

Lever
MDC controls are available with optional lever/handle. Align with Settings: Y module in the model code.
Standard orientation 90° from input shaft

P301 749

Forward-neutral-reverse electic control (FNR)
FNR principle
The 3-position FNR control uses an electric input signal to switch the pump to a full stroke position.
Under some circumstances, such as contamination, the control spool could stick and cause the pump tostay at some displacement.
A 170 μm screen is located in the supply line immediately before the control porting spool.

© Danfoss | June 2024

BC178386485160en-000603 | 27

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Forward-Neutral-Reverse electric control (FNR)

P003 193

FNR hydraulic schematic
M14
C1

C2

F00B

F00A

T

P
P003 189

Pump displacement vs. electrical signal

Displacement

100 %

“0“

Voltage VDC

100 %P003 190E

28 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Control current
Voltage

Min. current to stroke pump

Pin connections

12 V

750 mAany order

24 V

380 mADEUTSCH connector, 2-pin

12P003 480

Connector ordering data
Description

Quantity

Ordering data

Mating connector

1

DEUTSCH DT06-2S

Wedge lock1

DEUTSCH W2S

Socket contact (16 and 18 AWG)

2

DEUTSCH 0462-201-16141

Danfoss mating connector kit

1

K29657

Solenoid data
Voltage

12 V

24 V

Minimum supply voltage

9.5 VDC

19 VDC

Maximum supply voltage (continuous)

14.6 VDC

29 VDC

Maximum current

1050 mA

500 mA

Nominal coil resistance @ 20 °C [70 °F]

8.4 Ω

34.5 Ω

PWM Range

70-200 Hz

PWM Frequency (preferred)*

100 HzIP Rating (IEC 60 529) + DIN 40 050, part 9

IP 67 / IP 69K (part 9 with mating connector)

Bi-directional diode cut off voltage

28 VDC

53 VDC* PWM signal required for optimum control performance.

Pump output flow direction vs. control signal
Shaft rotation

CW

Coil energized*

CCW

C1

C2

C1

C2

Port A

in

out

out

in

Port B

out

in

in

out

Servo port pressurized

M5

M4

M5

M4

* For coil location see Installation Drawings.

Control response
MP1 controls are available with optional control passage orifices to assist in matching the rate of swashplate response to the application requirements (e.g. in the event of electrical failure).
The time required for the pump output flow to change from zero to full flow (acceleration) or full flow tozero (deceleration) is a net function of spool porting, orifices, and charge pressure.
© Danfoss | June 2024

BC178386485160en-000603 | 29

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
A swash-plate response times table is available for each frame size. Testing should be conducted to verify
the proper orifice selection for the desired response. Typical response times at the following conditions:Δ p = 250 bar [3626 psi]
Charge pressure = 20 bar [290 psi]
Viscosity and temperature = 30 mm²/s [141 SUS] and 50 °C [122 °F]
Speed = 1800 min-1 (rpm)Response time, FNR
Stroking
direction

0.8 mm [0.03 in] orifice 1.0 mm [0.04 in] orifice 1.3 mm [0.05 in] orifice No orifice
28/32

38/45

28/32

38/45

28/32

38/45

28/32

38/45

Neutral tofull flow

2.1 s

2.6 s

1.1 s

1.6 s

0.8 s

1.1 s

0.7 s

0.7 s

Full flow to 1.1 s
neutral

1.8 s

0.9 s

1.0 s

0.6 s

0.7 s

0.3 s

0.3 s

Non feedback proportional electric control (NFPE)The Non Feedback Proportional Electric (NFPE) control is an electrical automotive control in which an
electrical input signal activates one of two proportional solenoids that port charge pressure to either sideof the pump servo cylinder. The NFPE control has no mechanical feedback mechanism.
A serviceable 170 μm screen is located in the supply line immediately before the control porting spool.
Under some circumstances, such as contamination, the control spool could stick and cause the pump tostay at some displacement.
NFPE control

NFPE schematic
M14
C1

C2

F00B

F00A

T

P
P003 188

P003 192

The pump displacement is proportional to the solenoid signal current, but it also depends upon pump
input speed and system pressure. This characteristic also provides a power limiting function by reducing
the pump swashplate angle as system pressure increases. A typical response characteristic is shown in
the accompanying graph. Under some circumstances, such as contamination, the control spool could
stick and cause the pump to stay at some displacement.

30 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
NFPE pump displacement to input signal
100 %

c

′p

Signal Current
mA(DC)

′p

=0

bar

= 30
0 ba

r

NFPE control

a

b

a

b

c

Displacement

bar
=0
′p

′p

= 30
0 ba

r

"0"

P003 187E

100 %Control signal requirements
Control current
Voltagea*bc

Pin connections

12 V

600 mA

1080 mA

1360 mA

any order

24 V

300 mA

540 mA

680 mA* Factory test current, for vehicle movement or application actuation expect higher or lower value.

DEUTSCH connector, 2-pin

12P003 480

Connector ordering data
Description

Quantity

Ordering data

Mating connector

1

DEUTSCH DT06-2S

Wedge lock1

DEUTSCH W2S

Socket contact (16 and 18 AWG)

2

DEUTSCH 0462-201-16141

Danfoss mating connector kit

1

K29657

Description

12 V

24 V

Maximum current

1800 mA

920 mA@ 20 °C [68 °F]

3.66 Ω

14.20 Ω

@ 80 °C [176 °F]

4.52 Ω

17.52 Ω

33 mH

140 mH

Nominal coil resistanceInductance
PWM signal frequency
IP RatingRange

70 – 200 Hz

Recommended*

100 HzIEC 60 529

IP 67

DIN 40 050, part 9
Connector color

IP 69K with mating connectorBlack* PWM signal required for optimum control performance.

© Danfoss | June 2024

BC178386485160en-000603 | 31

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Pump output flow direction vs. control signal
Shaft rotation

CW

Coil energized*

CCW

C1

C2

C1

C2

Port A

in

out

out

in

Port B

out

in

in

out

Servo port pressurized

M5

M4

M5

M4

* For coil location see Installation drawings.

Control response
MP1 controls are available with optional control passage orifices to assist in matching the rate ofswashplate response to the application requirements (e.g. in the event of electrical failure). The timerequired for the pump output flow to change from zero to full flow (acceleration) or full flow to zero(deceleration) is a net function of spool porting, orifices, and charge pressure. A swashplate response
table is available for each frame indicating available swashplate response times. Testing should be
conducted to verify the proper orifice selection for the desired response.
Typical response times at the following conditions:∆p

250 bar [3626 psi]

Viscosity and temperature

30 mm2/s [141 SUS] and 50°C [122 °F]

Charge pressure

24 bar [348 psi]

Speed

1800 min-1 (rpm)Response time
Stroking
direction

0.8 mm [0.03] orifice

1.0 mm [0.04] orifice

1.3 mm [0.05] orifice

28/32

38/45

28/45

38/45

28/45

38/45

Neutral to full
flow

1.5 s

2.2 s

0.9 s

1.4 s

0.6 s

0.8 s

Full flow toneutral

0.9 s

1.1 s

0.6 s

0.7 s

0.4 s

0.5 s

Non-feedback, proportional hydraulic control (NFPH)
The non-feedback proportional hydraulic (NFPH) control is a hydraulic proportional control in which an
input pressure signal directly controls the pump servo piston to achieve pump displacement.
MP1 pumps with NFPH control have a special servo cylinder capable of providing proportional control
with a hydraulic input.
Swashplate position is proportional to the differential signal pressure at ports X1 and X2, butdisplacement is also dependent on pump speed and system pressure. This characteristic of non-feedback
controls provides a natural power limiting function by reducing the pump swashplate angle as systempressure increases. The accompanying graph shows typical operating characteristics.
The system may require tuning through the pump orifice combinations, control pressure supply line
sizing, actuation device output pressure and flow adjustments to achieve proper vehicle performance
characteristics.

32 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Non-feedback proportional hydraulic control schematic
X1 X2

L2

M5

M4

Pump flow direction with NFPH control
Input Shaft Rotation

CW

CCW

Port A flow

Out

In

In

Out

Port B flow

In

Out

Out

In

High servo gauge port

M4

M5

M4

M5

NFPH pump displacement to Input signal
100 %Input Signal Pressure
(bar)
a
c
b

∆p

∆p

=0

= 30

bar

0 ba

r

NFPH control

"0"
b

c

Displacement

bar
=0
∆p

∆p

= 30

0 ba

r

a

100 %

NFPH input signal pressure (bar)Frame size

a

b

c

28/32

5.5

13.7

17

38/45

5

12.75

16

The values provided in the table above are approximations at 1800 RPM and system delta pressures as
indicated in the graph provided. The values are dependent on input speed and delta pressure operating
conditions.
Control response
MP1 controls are available with optional control passage orifices to assist in matching the rate ofswashplate response to the application requirements (e.g. in the event of electrical failure). The timerequired for the pump output flow to change from zero to full flow (acceleration) or full flow to zero(deceleration) is a net function of spool porting, orifices, and charge pressure. A swashplate response© Danfoss | June 2024

BC178386485160en-000603 | 33

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
table is available for each frame indicating available swashplate response times. Testing should be
conducted to verify the proper orifice selection for the desired response.
Typical response times at the following conditions:∆p

250 bar [3626 psi]

Viscosity and temperature

30 mm2/s [141 SUS] and 50°C [122 °F]

Charge pressure

24 bar [348 psi]

Speed

1800 min-1 (rpm)Response time
Stroking
direction

0.8 mm [0.03] orifice

1.0 mm [0.04] orifice

1.3 mm [0.05] orifice

28/32

38/45

28/45

38/45

28/45

38/45

Neutral to full
flow

1.5 s

2.2 s

0.9 s

1.4 s

0.6 s

0.8 s

Full flow toneutral

0.9 s

1.1 s

0.6 s

0.7 s

0.4 s

0.5 s

Automotive control (AC)The Automotive control (AC) is an electric NFPE control with an integrated micro-controller, installed on
the pump.
The integrated micro-controller enhanced control performance with a flexible, configurable control
scheme for an entire single path propel transmission. It can be used in combination with fixed andvariable displacement hydraulic motors. With the pre-installed application software and easilychangeable control parameters, it is possible to tailor the vehicle’s driving behavior to the individual
requirements of the customer.

CC1
WARRANTY VOID IF REMOVEDCAN PPC PSC PPU

CC3

CC2
P003 544

The H1 automotive control is divided into 2 systems:
AC-1
AC-2

•
•

AC-2 is an extension of AC-1 that features an integrated pump swash plate angle sensor and software
enabled functions such as swash plate control.

34 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Mode types
The application software provides 3 different hydrostatic propel methods, defined as mode types, which
can be used individually.
Automotive Loaddependent

Torque controlled driving behavior. Setpoint for the drive curve is the enginerpm.

Non-Automotive
Load independent

Speed controlled driving mode. Setpoint for the drive curve is a joystick ordrive pedal signal, independent of the engine rpm. The best performance willachieved with an AC-2 Swash Plate Sensor.

Creep-Automotive
Load dependent

Torque controlled driving behavior (like Automotive). Setpoint for the drive
curve is the engine rpm. The setpoint can be reduced by the creep
potentiometer if a high engine rpm in combination with low vehicle speed isneeded.

Basic functions

•
•
•
•
•
•
•
•
•

Four selectable system modes, selectable via switch
Individual settings for forward and reverse driving direction (4 x 2 curves)
Independent pump and hydraulic motor profiling and ramping for each mode
Electric drive pedal connection
Electronic inching function without separate control valve
Electric creep mode potentiometer
Configurable System Mode and Direction change
Load independent pump displacement control with integrated Swash Plate Angle Sensor (AC-2)
Hydraulic motor displacement control including brake pressure defeat function

Performance functions

•
•
•
•
•
•
•

ECO fuel saving mode with automatic reduction of the engine speed during transport (Cruise control)
Vehicle constant speed drive control
Vehicle speed limitation
Dynamic brake light, automatic park brake, reverse buzzer and status LED outputs
Vehicle speed controlled output function
Temperature compensation for predictable performance
Advanced CAN J1939 interface for the information exchange with the vehicle control system

Protection and safety functions

•
•
•
•
•
•

© Danfoss | June 2024

Safety controlled vehicle start protection with engine speed check, battery check and FNR must be inneutral, etc.
Operator presence detection
Hydraulic system overheat and low-temperature protection
Hydraulic motor over speed protection
Park brake test mode for roller applications to fulfill SAE J1472/EN500-4
SIL2 compliant

BC178386485160en-000603 | 35

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Engine control and protection

•
•
•
•
•
•

CAN J1939 engine interface
Engine speed control via drive pedal with safety controlled monitoring function
Engine antistall protection
Engine over speed protection during inching
Engine speed dependent retarder control
Engine cold start protection

Installation features•••

Factory calibration for hysteresis compensation
Starting current adjustment in the factory
Pre-installed application software and parameter files

For more information, see Integrated Automotive Control (AC) for MP1 and H1P Single Pumps 28-250
Technical Information, BC152986482596.

36 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Control-cut-off valve (CCO valve)
The pump offers an optional control cut off valve integrated into the control. This valve will block chargepressure to the control, allowing the servo springs to de-stroke the pump regardless of the pump´sprimary control input. There is also a hydraulic logic port, X7, which can be used to control other machinefunctions, such as spring applied pressure release brakes. The pressure at X7 is controlled by the control
cut off solenoid. The X7 port would remain plugged if not needed.
In the normal (de-energized) state of the solenoid charge flow is prevented from reaching the controls. At
the same time the control passages and the X7 logic port are connected and drained to the pump case.
The pump will remain in neutral, or return to neutral, independent of the control input signal. Return toneutral time will be dependent on oil viscosity, pump speed, swashplate angle, and system pressure.
When the solenoid is energized, charge flow and pressure is allowed to reach the pump control. The X7
logic port will also be connected to charge pressure and flow.
The solenoid control is intended to be independent of the primary pump control making the control cut
off an override control feature. It is however recommended that the control logic of the CCO valve bemaintained such that the primary pump control signal is also disabled whenever the CCO valve is deenergized. Other control logic conditions may also be considered.
All EDC and MDC controls are available with a CCO valve.
The response time of the unit depends on the control type and the control orifices used.
The CCO-valve is available with 12 V or 24 V solenoid.
EDC with CCO
ControlHydraulic logic Port X7

P400346

Schematic
M14

C1

X7

C2

P400349© Danfoss | June 2024

BC178386485160en-000603 | 37

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
X7

Operation
MDC with CCO
Control

Schematic
M14

X7

P005 703

1

2

CCO solenoid data
Nominal supply voltage
Supply voltage

24 V

Maximum

14.6 V

29 V

Minimum

9.5 V

19 V

Bi-directional diode cut off voltage

28 V

53 V

Nominal coil resistance at 20 °C

10.7 Ω

41.7 ΩMaximum

850 mA430 mA

Minimum

580 mA

300 mARange

50 – 200 Hz

Preferred

100 HzSupply current

PWM frequency

Electrical protection class38 | © Danfoss | June 2024

12 V

IP67 / IP69K with mating connector

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
CCO solenoids are design for battery voltage application within the voltage range in the table above, inconsideration of a wide range of environmental temperature common for known hydraulic applications.
Closed loop PWM current supply can be also applied and is helpful in case that the voltage range is
exceeded, or ambient temperature could rise in an unusual manner.
Brake gauge port with MDC

C Caution
It is not recommended to use brake port for any external flow consumption to avoid malfunction of CCO
function.

Displacement limiter
All pumps are designed with optional mechanical displacement (stroke) limiters factory set to max.
displacement.
The maximum displacement of the pump can be set independently for forward and reverse using thetwo adjustment screws to mechanically limit the travel of the servo piston. Adjustment procedures arefound in the Service Manual. Adjustments under operating conditions may cause leakage. The
adjustment screw can be completely removed from the threaded bore if backed out to far.
Displacement limiter
Servo piston

Displacement limiter

Servo cylinder

P400347

Displacement change (approximate)© Danfoss | June 2024

Parameter

28

32

38

45

1 Turn ofdisplacement limiter screw

2.9 cm3[0.18 in3]

3.3 cm3

3.56 cm3

4.22 cm3[0.26 in3]

Internal wrench size

4 mmExternal wrench size

13 mm

Torque forexternal hex seal lock nut

23 N•m [204 lbf•in][0.20 in3]

[0.22 in3]

BC178386485160en-000603 | 39

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Speed sensor
The speed sensor is designed for rugged outdoor, mobile or heavy industrial speed sensing applications.
The detection of the speed is contactless and does not need any calibration or adjustments.
For more information, see Speed and Temperature Sensor, Technical Information, BC152886482203.
Temperature Range
Parameter

Minimum

Maximum

Operation temperature range-40 °C

104 °C

115°C intermittent = short term; t < 1min per incident and not exceeding 2 % of duty cycle based loadlife.
Output pulses
The expected number of output pulses per revolution is shown below.
The number of output (speed) pulses
MP1P size

28/32

38/45

Pulses (per rev)

9

11

Mating connectors
There are available two types of mating connectors Assembly Bag DEUTSCH DTM06-6S, Black and Grey.
Ordering number
11033865

11033863

Assembly Bag, DEUTSCH DTM06-6S-E004; black, (24-20
AWG) 0.21 -0.52 mm²Assembly Bag, DEUTSCH DTM06-6S, gray, (24-20 AWG)
0.21 -0.52 mm²

Speed sensor 4.5 – 8 V
1. Speed signal 2
2. NC
3. Speed signal 1
4. Supply
5. Ground
6. Temperature

Speed sensor connector, 6-pin
4 56
3 2 1
P006035

Technical data

40 | © Danfoss | June 2024

Parameter

Min.

Nom.

Max.

Note

Supply voltage

4.5 VDC

5 VDC

8 VDC

Regulated supply voltage.
Reverse polarity protected.

Supply protection––

30 VDC

Shuts off above 9 V.

Max. required supply current

–

–

25 mA

At supply voltage

Max. output current

–

–

50 mA

Operation mode

NPN & PNP

Temperature signal-40°C = 2.318V–

100°C = 0.675V

Output low

5%

8.5 %

12 %

Push-Pull amplifier

Ratiometric output voltage
Low state > 0 V to provide wire
fault detection

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operation
Technical data (continued)
Parameter

Min.

Nom.

Max.

Note

Output high88 %91.5 %

95 %Detectable frequency range

1 Hz

–

10 000 Hz

Ordering number

149055

Color of connector

Black

Temperature Signal
For calculation of the case fluid temperature and the output signal voltage, see the formulas below:
VO – Measured output voltage (V)Vo= (-3.88 • 10-6 • T2) + (-1.15 • 10-2 • T) + 1.8639
T – Temperature (°C)
T = –1481.96 + √ 2.1962 · 10 6 +(1.8639 – Vº)
3.88 · 10 -6

Output signal voltage vs. Temperature
Temperature range-55 °C**-40 °C-30 °C

0 °C+30 °C*+80 °C+100 °C+130 °C**

2.485 V2.318 V

2.205 V1.864 V1.515 V

0.919 V

0.675 V

0.303 V

* Accuracy: ±1. 5 to ± 4 °C** Accuracy: ±2.5 to ± 5 °C

Response time in fluid
T90 definition
T90 definition
90

60
50

90 % of ′ Temp

70
′ TempTemperature (°C)

8040Real temperature
Temperature
Signal

30
20
10
0
-100

T90

0

100

200

300

400
500
Time (S)

600

700

800

900

1000
P003531E

Response time in fluid (T90) = 360 s© Danfoss | June 2024

BC178386485160en-000603 | 41

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operating parameters
Input speed
Minimum speed is the lowest input speed recommended during engine idle condition. Operating below
minimum speed limits pump’s ability to maintain adequate flow for lubrication and power transmission.
Rated speed is the highest input speed recommended at full power condition. Operating at or below
this speed should yield satisfactory product life.
Maximum speed is the highest operating speed permitted. Exceeding maximum speed reduces productlife and can cause loss of hydrostatic power and braking capacity. Never exceed the maximum speed
limit under any operating conditions.
Operating conditions between Rated speed and Maximum speed should be restricted to less than fullpower and to limited periods of time. For most drive systems, maximum unit speed occurs during
downhill braking or negative power conditions.
During hydraulic braking and downhill conditions, the prime mover must be capable of providing
sufficient braking torque in order to avoid pump over speed. This is especially important to consider forturbocharged and Tier 4 engines.

W Warning
Unintended vehicle or machine movement hazard.
Exceeding maximum speed may cause a loss of hydrostatic drive line power and braking capacity. You
must provide a braking system, redundant to the hydrostatic transmission, sufficient to stop and hold thevehicle or machine in the event of hydrostatic drive power loss.

System Pressure
System pressure is the differential pressure between system ports A and B. It is the dominant operating
variable affecting hydraulic unit life. High system pressure, which results from high load, reduces
expected life. Hydraulic unit life depends on the speed and normal operating, or weighted average,pressure that can only be determined from a duty cycle analysis.
Application pressure is the high pressure relief setting normally defined within the order code of thepump. This is the applied system pressure at which the driveline generates the maximum calculated pullor torque in the application.
Maximum working pressure is the highest recommended Application pressure. Maximum working
pressure is not intended to be a continuous pressure. Propel systems with Application pressures at, or
below, this pressure should yield satisfactory unit life given proper component sizing.
Maximum pressure is the highest allowable Application pressure under any circumstance. Applicationpressures above Maximum Working Pressure will only be considered with duty cycle analysis and factory
approval. Pressure spikes are normal and must be considered when reviewing maximum working
pressure.
All pressure limits are differential pressures referenced to low loop (charge) pressure. Subtract low looppressure from gauge readings to compute the differential.
Minimum low loop pressure (above case pressure) is the lowest pressure allowed to maintain a safe
working condition in the low side of the loop.

42 | © Danfoss | June 2024

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Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operating parameters
Charge pressure
An internal charge relief valve regulates charge pressure. Charge pressure maintains a minimum pressurein the low side of the transmission loop.
The charge pressure setting listed in the order code is the set pressure of the charge relief valve with thepump in neutral, operating at 1800 min-1 [rpm], and with a fluid viscosity of 32 mm2/s [150 SUS]. Pumps
configured with no charge pump (external charge supply) are set with a charge flow of 18.9 l/min [5.0 US
gal/min] and a fluid viscosity of 32 mm2/s [150 SUS].
The charge pressure setting is referenced to case pressure.
Charge pump inlet pressure
At normal operating temperature charge inlet pressure must not fall below rated charge inlet pressure(vacuum).
Minimum charge inlet pressure is only allowed at cold start conditions. In some applications it isrecommended to warm up the fluid (e.g. in the tank) before starting the engine and then run the engine
at limited speed until the fluid warms up.
Maximum charge pump inlet pressure may be applied continuously.
Case pressure
Under normal operating conditions, the rated case pressure must not be exceeded. During cold start casepressure must be kept below maximum intermittent case pressure. Size drain plumbing accordingly.

C Caution
Possible component damage or leakage
Operation with case pressure in excess of stated limits may damage seals, gaskets, and/or housings,
causing external leakage. Performance may also be affected since charge and system pressure are
additive to case pressure.

Temperature
The high temperature limits apply at the hottest point in the transmission, which is normally the motor
case drain. The system should generally be run at or below the rated temperature.
The maximum intermittent temperature is based on material properties and should never be
exceeded.
Cold oil will not affect the durability of the transmission components, but it may affect the ability of oil toflow and transmit power; therefore temperatures should remain 16 °C [30 °F] above the pour point of thehydraulic fluid.
The minimum temperature relates to the physical properties of component materials. Size heatexchangers to keep the fluid within these limits. Danfoss recommends testing to verify that thesetemperature limits are not exceeded.
Ensure fluid temperature and viscosity limits are concurrently satisfied.

© Danfoss | June 2024

BC178386485160en-000603 | 43

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Operating parameters
Viscosity
Viscosity For maximum efficiency and bearing life, ensure the fluid viscosity remains in therecommended range.
The minimum viscosity should be encountered only during brief occasions of maximum ambient
temperature and severe duty cycle operation.
The maximum viscosity should be encountered only at cold start.

44 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters

Filtration system
To prevent premature wear, ensure that only clean fluid enters the hydrostatic transmission circuit. A
filter capable of controlling the fluid cleanliness to ISO 4406, class 22/18/13 (SAE J1165) or better, undernormal operating conditions, is recommended.These cleanliness levels cannot be applied for hydraulicfluid residing in the component housing/case or any other cavity after transport.
Filtration strategies include suction or pressure filtration. The selection of a filter depends on a number offactors including the contaminant ingression rate, the generation of contaminants in the system, therequired fluid cleanliness, and the desired maintenance interval. Filters are selected to meet the above
requirements using rating parameters of efficiency and capacity.
Filter efficiency can be measured with a Beta ratio (βX). For simple suction-filtered closed circuit
transmissions and open circuit transmissions with return line filtration, a filter with a β-ratio within therange of β35-45 = 75 (β10 ≥ 2) or better has been found to be satisfactory. For some open circuit systems,
and closed circuits with cylinders being supplied from the same reservoir, a higher filter efficiency isrecommended. This also applies to systems with gears or clutches using a common reservoir. For thesesystems, a charge pressure or return filtration system with a filter β-ratio in the range of β15-20 = 75 (β10 ≥10) or better is typically required.
Because each system is unique, only a thorough testing and evaluation program can fully validate thefiltration system. Please see Design Guidelines for Hydraulic Fluid Cleanliness Technical Information,
BC152886482150 for more information.
Cleanliness level and βx-ratio1
Filtration(recommended
minimum)

Cleanliness per ISO 4406
Efficiency (charge pressure
filtration)
Efficiency (suction and return line
filtration)
Recommended inlet screen meshsize

22/18/13
β15-20 = 75 (β10 ≥ 10)
β-ratio
β35-45 = 75 (β10 ≥ 2)µm

100 – 125

1 Filter β -ratio is a measure of filter efficiency defined by ISO 4572. It is defined as the ratio of the number of particles
x

greater than a given diameter (“x” in microns) upstream of the filter to the number of these particles downstream of
the filter.

Filtration
Suction filtration
A suction circuit uses an internal charge pump. The filter is placed between the reservoir and the charge
pump inlet. Do not exceed the inlet vacuum limits during cold start conditions.

© Danfoss | June 2024

BC178386485160en-000603 | 45

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters
Suction filtration

P400032

Charge pressure filtration
In a pressure filtration system the pressure filter is remotely mounted in the circuit, downstream of thecharge supply. Pressure filtration is possible with, and without, an internal charge pump. Filters used incharge pressure filtration circuits should be rated to at least 35 bar [508 psi] pressure. Danfoss
recommends locating a 100 – 125 micron screen in the reservoir or in the charge inlet when using chargepressure filtration.
A filter bypass valve is necessary to prevent damage to the hydrostatic system. In the event of highpressure drop associated with a blocked filter or cold start-up conditions, fluid may bypass the filter
temporarily. Avoid working with an open bypass for an extended period. A visual or electrical bypass
indicator is preferred. Proper filter maintenance is mandatory.
Charge pressure filtration

Reservoir

Strainer
Filterwith bypass

To Low Pressure
side of loop

Potential
workfunction
circuit

Chargepump

Charge relief valve
To pump case
P40003146 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters
Independent braking system

W Warning
Unintended vehicle or machine movement hazard.
The loss of hydrostatic drive line power, in any mode of operation (forward, neutral, or reverse) may cause
the system to lose hydrostatic braking capacity. You must provide a braking system, redundant to thehydrostatic transmission, sufficient to stop and hold the vehicle or machine in the event of hydrostatic
drive power loss.

Fluid selection
Ratings and performance data published in this Technical Information and Service Manuals are based on
operating with mineral oil based hydraulic fluids containing set of different additives. These fluids
possess good thermal stability, high load-carrying capacity and wear protection in hydraulic systems.
More information about Fluids and Lubricants you can find in our Technical Information “Hydraulic Fluids
and Lubricants” (BC00000093)
Any warranty applicable for failures related to components of Danfoss Power Solutions does not apply
for any fluid related damages, unless such warranty has been expressly and specifically granted.

C Caution
It is not permissible to mix lubricants, different additive packages may cause negative interactions. If
lubricant mixing cannot be avoided, contact your fluid manufacturer for recommendations.
Reservoir
The hydrostatic system reservoir should accommodate maximum volume changes during all system
operating modes and promote de-aeration of the fluid as it passes through the tank.
A suggested minimum total reservoir volume is 5/8 of the maximum charge pump flow per minute with aminimum fluid volume equal to 1/2 of the maximum charge pump flow per minute. This allows 30
seconds fluid dwell for removing entrained air at the maximum return flow. This is usually adequate toallow for a closed reservoir (no breather) in most applications.
Locate the reservoir outlet (charge pump inlet) above the bottom of the reservoir to take advantage ofgravity separation and prevent large foreign particles from entering the charge inlet line. A 100-125 µm
screen over the outlet port is recommended.
Position the reservoir inlet (fluid return) to discharge below the normal fluid level, toward the interior of
the tank. A baffle (or baffles) will further promote de-aeration and reduce surging of the fluid.
Case drain
The pump housing must remain full of oil at all times. The MP1 pump is equipped with two case drain
ports to provide flexibility for hose routing and pump installation. Connect a line from one of the casedrain ports to the reservoir. Case drain fluid is typically the hottest fluid in the system.
Charge pump
Charge flow is required on MP1 pumps. The charge pump provides flow to make up for system leakage,
maintain a positive pressure in the main circuit, and provide flow for cooling and filtration.
Many factors influence the charge flow requirements and the resulting charge pump size selection. These
factors include system pressure, pump speed, pump swashplate angle, type of fluid, temperature, size ofheat exchanger, length and size of hydraulic lines, auxiliary flow requirements, hydrostatic motor type,etc. When initially sizing and selecting hydrostatic units for an application, it is frequently not possible tohave all the information necessary to accurately evaluate all aspects of charge pump size selection.
© Danfoss | June 2024

BC178386485160en-000603 | 47

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters
Unusual application conditions may require a more detailed review of charge pump sizing. Chargepressure must be maintained at a specified level under all operating conditions to prevent damage to thetransmission. Danfoss recommends testing under actual operating conditions to verify this.
Charge pump sizing/selection
In most applications a general guideline is that the charge pump displacement should be at least 10 % of
the total displacement of all components in the system. Unusual application conditions may require amore detailed review of charge flow requirements. Please refer to Selection of Drive line Components,
BC157786484430 for a detailed procedure.
System features and conditions which may invalidate the 10 % guideline include (but are not limited to):• Continuous operation at low input speeds {< 1500 min-1 (rpm)}

•
•
•
•
•

High shock loading and/or long loop lines
High input shaft speeds
LSHT motors with large displacement and/or multiple LSHT motors
High flushing flow requirements
Automotive style operation where input speeds fluctuate or operate below 800 min-1 (rpm)Contact your Danfoss representative for application assistance if your application includes any of these
conditions.

48 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters
Charge pump output flow
Charge pump flow and power curves, 9/12 cm3Charge pressure: 20 bar [290 psi]
Viscosity: 11 mm2/s [63 SUS]
Temperature: 80 °C [176 °F]

Charge pump flow

[l/min]40.0

Charge pump power requirements

[kW]
3.0

35.0

2.5

30.0
2.0

25.0
20.0

1.5

15.0

1.0

10.0

0.5

5.0

0.0

0.0
0

500

1000

1500
9 cm3

2000

2500
12 cm3

3000

3500
4000
Speed [min-1]

0

500

1000

1500
9 cm3

2000

2500
12 cm3

3000

3500
4000
Speed [min-1]
P400354

Bearing life and external shaft loading
Bearing life is a function of speed, system pressure, charge pressure, and swashplate angle, plus any
external side or thrust loads. Other life factors include oil type and viscosity. The influence of swashplateangle includes displacement as well as direction. External loads are found in applications where thepump is driven with side/thrust load (belt or gear) as well as in installations with misalignment andimproper concentricity between the pump and drive coupling. All external side loads will act to reduce
the normal bearing life of a pump.
In vehicle propel drives with no external shaft loads and where the system pressure and swashplate angle
are changing direction and magnitude regularly, the normal B10 bearing life (90% survival) will exceed
the hydraulic load-life of the unit.
In non propel drives such as vibratory drives, conveyor drives, or fan drives, the operating speed andpressure are often nearly constant and the swashplate angle is predominantly at maximum. These drives
have a distinctive duty cycle compared to a propulsion drive. In these types of applications a bearing life
review is recommended.
MP1 pumps are designed with bearings that can accept some external radial. When external loads arepresent, the allowable radial shaft loads are a function of the load position relative to the mounting
flange, the load orientation relative to the internal loads, and the operating pressures of the hydraulicunit. In applications where external shaft loads can not be avoided, the impact on bearing life can be
minimized by proper orientation of the load. Optimum pump orientation is a consideration of the net
loading on the shaft from the external load, the pump rotating group, and the charge pump load.

© Danfoss | June 2024

BC178386485160en-000603 | 49

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters•

In applications where the pump is operated such that nearly equal amounts of forward vs reverse
swashplate operation is experienced; bearing life can be optimized by orientating the external sideload to the 0 or 180 deg position (90 deg to rotating group load Fb). See drawing.

•

In applications where the pump is operated such that the swashplate is predominantly (>75%) on
one side of neutral (e.g. vibratory, conveyor, typical propel); bearing life can be optimized byorientating the external side load generally opposite of the internal rotating group load, Fb. The
direction of the internal loading is a function of rotation and system port, which has flow out.

•

Avoid axial thrust loads in either direction.

The maximum allowable radial loads (Re), based on the maximum external moment (Me) and the
distance (L) from the mounting flange to the load, may be determined from the tables below and thecross section drawing.
The maximum allowable radial load is calculated as: Re = Me / L
Contact your Danfoss representative for an evaluation of unit bearing life if continuously applied externalradial loads are 25% or more of the maximum allowable, or if thrust loads are known to exist. Use tapered
output shafts or clamp-type couplings where radial shaft side loads are present.
Shaft loading parameters
Re

Maximum external radial load

Me

Maximum external moment

L

Distance from mounting flange to point of load

Fb

Internal rotating group loadTe

Thrust external load

Fcp

Force of charge pump

External radial shaft load

L
Re

F cp

Fb

90 R e180 Re50 | © Danfoss | June 2024

P400320

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters
Hydraulic unit life
Hydraulic unit life is defined as the fatigue life expectancy of the hydraulic components. It is a function of
speed and system pressure; however, system pressure is the dominant variable. High pressure, which
results from high load, reduces expected hydraulic unit life.
System component selection is based on determination of the application maximum loads and speeds.
Testing is recommended to secure duty cycle data in which to predict hydraulic unit life. Contact yourDanfoss representative for assistance in unit life determination. If duty cycle data is not available, normal
input power and maximum pump displacement can be used to determine an application pressure inwhich to predict life.
MP1 pumps will meet most application hydraulic unit life expectancies if applied within the parametersspecified in this manual and chosen considering the guidelines within Danfoss publication Selection ofDriveline Components BC157786484430. For more detailed information on hydraulic unit life, see
Danfoss publication Pressure and Speed Limits BC152886484313.
Mounting flange loads
Shock load moment is the result of an instantaneous jolt to the system. Continuous load moments are
generated by the typical vibratory movement of the application. Avoid excessive loading of themounting flange such as adding tandem mounted auxiliary pumps and/or subjecting pumps to highshock loads. Design pump applications to stay within the allowable shock load moment and allowablecontinuous load moment.
Use the following formulas to estimate overhung load moment for multiple pump mountings:
MS = GS (W1L1 + W2L2 + ... +WnLn)
MC = GC (W1L1 + W2L2 + ... +WnLn)
Refer to the Installation Drawings section to find pump length (L). Refer to the table Technical
Specifications in the Specifications section, to find pump weight (W). An exact measure of W will dependon the pump’s features.
Overhung loading parameters
Ms

Shock load moment

Mc

Continuous load moment

Gs

Maximum shock acceleration (Gs)GcContinuous (vibratory) acceleration (Gs)

Wn

Weight of nth pump

Ln

Distance from mounting flange to center of gravity of nth pump

The tables below show allowable overhung load moment values. If system parameters exceed thesevalues add additional pump support.
Allowable overhung parameters© Danfoss | June 2024

Frame size

Continuous load moment (Mc) 107 cyclesN•m [in·lbf]

Shock load moment (Ms) 103 cyclesN•m [in·lbf]

28/32

1100 [9736]

2000 [17702]

38/45

1500 [13276]

2800 [24782]

BC178386485160en-000603 | 51

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters
Shaft loading parameters
CG
Pump 1

Mounting flange

CG
Pump 2L1
L2P400332

This illustration shows two single pumps in tandem.
Estimated maximum and continuous acceleration factors for some typical applications are shown.
Applications which experience extreme resonant vibrations may require additional pump support.
Typical continuous (vibratory) values can vary significantly due to changes in engine and pumpconfiguration and mounting methods.
G-factors for sample applications
Application

Continuous (vibratory) acceleration (Gc)

Maximum (shock) acceleration (Gs)

Trencher(rubber tires)

3

8Asphalt paver

2

6Windrower

2

5

Aerial lift

1.5

4

Turf care vehicle

1.5

4

Vibratory roller

610* Applications which experience extreme resonant vibrations require addition pump support.

52 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters
Shaft torques
Shaft selection
Base shaft selection on a review of the maximum torque required by the application and the maximum
torque available from the prime mover. Application duty cycle and continuous torque rating of the prime
mover are the main variable to consider when selecting a shaft.
Shaft torque and splines lubrication
The rated torque is a measure of tooth wear and is the torque level at which a normal spline life of 1 x
107 shaft revolutions can be expected. The rated torque presumes a regularly maintained minimum levelof lubrication via a moly-disulfide grease in order to reduce the coefficient of friction and to restrict thepresence of oxygen at the spline interface. It is also assumed that the mating spline has a minimum
hardness of Rc 55 and full spline depth. The rated torque is proportional to the minimum active spline
length.
However, a spline running in oil-flooded environment provides superior oxygen restriction in addition tocontaminant flushing. The rated torque of a flooded spline can increase to that of the maximum
published rating. A flooded spline would be indicative of a pump driven by a pump drive or plugged into
an auxiliary pad of a pump.
Maximum torque ratings are based on torsional fatigue strength considering 1 x 105 full load reversing
cycles.
Maintaining a spline engagement at least equal to the pitch diameter will also maximize spline life. Spline
engagements of less than ¾ pitch diameter are subject to high contact stress and spline fretting.
Shaft torque for tapered shafts
The rated torque is based on the contact pressure between the shaft and hub surfaces with poor contact
areas. With increased quality of the contact areas, the contact pressure between shaft and hub isincreased, allowing higher torque to be transmitted.
A key is intended as an installation aid only. Any torque carried by the key as a result of poor contact areaor mis-alignment will limit the torque carrying capability of the shaft significantly.
Maximum torque rating is based on an ideal contact area of 100% and the retaining nut properly
torqued. This allows for the highest contact pressure between the shaft and the mating hub.

© Danfoss | June 2024

BC178386485160en-000603 | 53

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters
Shaft availability and torque ratings
Alignment between the mating spline’s Pitch Diameters is another critical feature in determining theoperating life of a splined drive connection. Plug-in, or rigid spline drive installations can impose severeradial loads on the shafts.
The radial load is a function of the transmitted torque and shaft eccentricity. Increased spline clearance
will not totally alleviate this condition; BUT, increased spline clearance will prevent mechanicalinterference due to misalignment or radial eccentricity between the pitch diameters of the mating
splines. Spline life can be maximized if an intermediate coupling is introduced between the bearing
supported splined shafts.
Multiple pump installations must consider the loads from the entire pump stack and all torques are
additive. Charge pumps loads must also be included.
Through torque diagram

Me1 for the first pump

Me input torqueMe1 for the second pumpMe3 for the next pumpP400348

Attention
Torque required by auxiliary pumps is additive. Ensure requirements do not exceed shaft torque ratings.
Understanding and minimizing system noise
Noise is transmitted in fluid power systems in two ways: as fluid borne noise, and structure borne noise.
Fluid-borne noise (pressure ripple or pulsation) is created as pumping elements discharge oil into thepump outlet. It is affected by the compressibility of the oil, and the pump’s ability to transition pumping
elements from high to low pressure. Pulsations travel through the hydraulic lines at the speed of sounduntil there is a change (such as an elbow) in the line. Amplitude varies with overall line length andposition.
Structure borne noise is transmitted wherever the pump casing connects to the rest of the system. The
way system components respond to excitation depends on their size, form, material, and mounting.
System lines and pump mounting can amplify pump noise.
Follow these suggestions to help minimize noise in your application:• Use flexible hoses.

••

54 | © Danfoss | June 2024

Limit system line length.
If possible, optimize system line position to minimize noise.

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters•••© Danfoss | June 2024

If you must use steel plumbing, clamp the lines.
If you add additional support, use rubber mounts.
Test for resonance in the operating range; if possible avoid them.

BC178386485160en-000603 | 55

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
System design parameters
Sizing equations
The following equations are helpful when sizing hydraulic pumps. Generally, the sizing process is
initiated by an evaluation of the machine system to determine the required motor speed and torque toperform the necessary work function.

Based on SI units

Based on US units

Flow

=

Vg • n • η v
1000(l/min)=TorqueInput torque M =Vg • ′p
20 • π • η m(N•m)

Input torque M =

Power

•n•π
Input power P = M= 600 • η
30 000(kW)M•n•π
Input power P = 198= 1714 • η000

Q • ′pt

Vg • n • η v
231(US gal/min)Vg • ′p2 • π • ηm(lbf•in)Q • ′p(hp)
t

Variables
SI units [US units]
Vg= Displacement per revolution cm3/rev [in3/rev]

pO= Outlet pressure bar [psi]pi= Inlet pressure bar [psi]∆p= pO - pi (system pressure) bar [psi]n= Speed min-1 (rpm)ηv= Volumetric efficiency

ηm= Mechanical efficiency

ηt= Overall efficiency (ηv • ηm)

First, the motor is sized to transmit the maximum required torque. The pump is then selected as a flow
source to achieve the maximum motor speed. Refer to Selection of Drive Line Components,
BC157786484430, for a more complete description of hydrostatic drive line sizing.

56 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Model code
Model code (A - B - C)
Prod
MP1 P

A

B

C

D

F

N N N

H

J

T

K

E

M

N

F

Z

L

V

G

W

X

Y

N N

A - displacement and rotation
Code

Description

28R

28 cm3, clockwise (right hand)

28L

28 cm3, counterclockwise (left hand)

32R

32 cm3, clockwise (right hand)

32L

32 cm3, counterclockwise (left hand)

38R

38 cm3, clockwise (right hand)

38L

38cm3, counterclockwise (left hand)

45R

45 cm3, clockwise (right hand)

45L

45 cm3, counterclockwise (left hand)B - product version and unit
Code

Description

AS

Product Version "A", Inch, Customer port sealing according to ISO 11926-1

AMProduct Version "A", Metric , Customer port sealing according to ISO 6149-1

C - automotive control and inching© Danfoss | June 2024

Code

Description

NNN

None

BC178386485160en-000603 | 57

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Model code
Model code (D)
Prod
MP1 P

A

B

C

D

F

N N N

H

J

T

K

E

M

N

F

Z

L

V

G

W

X

Y

N N

D - controls
Code

Voltage

Options

Port

Connect
or

SA2

12V

—

Inch

DEUTSCH

SA3

24V

—

Inch

DEUTSCH

SA4

12V

Manual override

Inch

DEUTSCH

SA5

24V

Manual override

Inch

DEUTSCH

SE7

12V

Control cut-off

Inch

DEUTSCH

SE8

24V

Control cut-off

Inch

DEUTSCH

SG8

12V

Manual override, control cut-off

Inch

DEUTSCH

SH1

Control type

EDC
Electric displacement control

24V

Manual Override, Control Cut-Off

Inch

DEUTSCH

MA4

12V

Manual override

MetricDEUTSCH

MA5

24V

Manual override

MetricDEUTSCH

MG8

12V

Manual override, control Cut-Off

MetricDEUTSCH

MH1

24V

Manual Override, Control Cut-Off

MetricDEUTSCH

SH2

12V

Angle Sensor

Inch

DEUTSCH

SH71)

24V

Angle Sensor, Manual Override

Inch

DEUTSCH

SM1-

Standard

Inch

-

SM2

-

Neutral Start Switch

Inch

DEUTSCH

MM1-

Standard

Metric-MM2-

Neutral Start Switch

MetricDEUTSCH

SM3

12V

Control Cut-Off

Inch

DEUTSCH

SM4

24V

Control Cut-Off

Inch

DEUTSCH

12V

Control cut-off, neutral startswitchInch

DEUTSCH

24V

Control cut-off, neutral startswitchInch

DEUTSCH

MM3

12V

Control cut-off

MetricDEUTSCH

MM4

24V

Control cut-off

MetricDEUTSCH

MM5

12V

Control cut-off, neutral startswitchMetricDEUTSCH

MM6

24V

Control cut-off, neutral startswitchMetricDEUTSCH

SM5
SM6

MDC
Manual displacement control

SA9

12V

Manual override

Inch

DEUTSCH

SB1

24V

Manual override

Inch

DEUTSCHDEUTSCH

MA9

FNR
Forward-neutral-reverse

12V

Manual override

MetricMB1

24V

Manual override

MetricDEUTSCH

SN1

12V

Manual override

Inch

DEUTSCH

24V

Manual override

Inch

DEUTSCH

12V

Manual override

MetricDEUTSCH

24V

DEUTSCH

SN2
MN1

NFPE
Non-feedback proportional
electric

MN2

Manual override

Metric

-

-

Inch

-

MNN

NFPH
Non-feedback proportional
hydraulic--

Metric-AJ1

AC-1 automotive control

12 V

Manual override-

DEUTSCH

SNN

58 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Model codeD - controls (continued)
Code

Control type

Voltage

Options

Port

Connect
or

AJ3

AC-2 automotive control

12 V

Angle sensor, manual override-

DEUTSCH

12 V

Manual override w/out PPU
wiring-DEUTSCH

12 V

Angle sensor, manual override,
w/out PPU wiring-

DEUTSCH

AU1

AC-1

AU3

AC-2

1) 28/32 only

Code

Control type

Control input pressure

ST1

HDCHydraulicdisplacement control

Port

4.2 - 16.2 bar

Inch

4.2 - 16.2 bar

MetricST2

3.0 - 11.6 bar

Inch

MT2

3.0 - 11.6 bar

MetricMT1

Align each with options B: Product Version, E: Displacement limitation, F: Orifices, and W : Special
hardware features

Model code (F)
Prod
MP1 P

A

B

C

D

F

N N N

H

J

T

K

E

M

N

F

Z

L

V

G

W

X

Y

N N

F – orifices
Code

Orifice
Tank (A+B)

C3© Danfoss | June 2024

Controls: (X marks compatible use)P

A/B

No orifice

EDC, FNR

MDC

X

X

NFPE, AC

NFPH

C1

0.8 mm

X

X

X

X

C2

1.3 mm

X

X

X

X

C4

1.0 mm

X

X

X

X

C6

1.0 mmX

C7

1.3 mmX

C8

0.6 mm

0.8 mmX

C9

0.6 mm

1.0 mmX

D1

0.8 mm

1.0 mmX

D2

0.8 mm

1.3 mmX

D3

1.0 mm

1.3 mmX

D4

1.0 mm

1.3 mm

1.3 mmX

D5

0.6 mm

0.6 mm

0.8 mmX

E2

0.8 mm

1.0 mm

0.8 mmX

BC178386485160en-000603 | 59

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Model code
Model code (H - J - T)
Prod
MP1 P

A

B

C

D

F

H

N N N

J

T

K

E

M

N

F

Z

L

V

G

W

X

Y

N N

H - mounting flange
Code

Description

F

ISO 3019-1, flange 101-2 (SAE B)

J - input shaft
Code

Description

28

32

38

45

G4

ISO 3019-1, outer dia. 22 mm(SAE B, 13 teeth splined shaft 16/32 pitch)

X

X

X

X

F6

ISO 3019-1, outer dia. 22 mm(SAE B, 13 teeth splined shaft 16/32 pitch -SPCL bearing (highcapacity)

X

X

X

X

G5

ISO 3019-1, outer dia. 23 mm(SAE B 15 teeth splined shaft 16/32 pitch)

X

X

X

X

F5

ISO 3019-1, outer dia. 23 mm(SAE B 15 teeth splined shaft 16/32 pitch -SPCL bearing (highcapacity)

X

X

X

X

F2

Conical keyed shaft similar to ISO 3019-1 code 25-3, taper*

X

X

A8

Round straight keyed Ø25.4 mm*

X

X

A7

Round straight keyed Ø22.23 mm*

X

X

A9

Round straight keyed Ø22.23 mm in-SPCL Bearing (High Capacity)*

X

X

G1

ISO 3019-1, outer dia. 31.58 mm(SAE B, 14 teeth splined shaft 12/24 pitch)

X

X

G6

ISO 3019-1, outer dia. 31.24 mm(SAE B 19 teeth splined shaft 16/32 pitch)

X

X

G7

ISO 3019-1, outer dia. 31.24 mm(SAE B 19 teeth splined shaft 16/32 pitch - SPCL bearing (highcapacity)

X

X

F1

ISO 3019-1, outer dia. 31.58 mm(SAE B 14 teeth splined shaft 12/24 pitch -SPCL bearing (highcapacity)

X

X

F3

Conical keyed shaft similar to ISO 3019-1 code 25-3, taper - SPCL
bearing (high capacity)

X

X

A6

Round straight keyed Ø25.4mm - SPCL bearing (high capacity)XX* (key not supplied with shaft)T - filtration

60 | © Danfoss | June 2024

Code

Description

Note

E

External charge flow filtration

Align with K: charge pump and auxiliary pad(no charge pump options)R

Remote full charge flow filtration

S

Suction filtration

Align with K: charge pump and auxiliary Pad(9 cc or 12 cc charge pump options)

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Model code
Model code (K)
Prod
MP1 P

A

B

C

D

F

N N N

H

J

T

K

E

M

N

F

Z

L

V

G

W

X

Y

N N

K - charge pump and auxiliary pad
Code

Description

A16

9 cm3/rev charge pump, SAE A 9 tooth (w/shipping cover), inch

28

B16

9 cm3/rev charge pump, SAE A 9 tooth (w/shipping cover), metricA19

9 cm3/rev charge pump, SAE A 11 tooth (w/shipping cover), inch

B19

9 cm3/rev charge pump, SAE A 11 tooth (w/shipping cover), metricA22

9 cm3/rev charge pump, SAE B 13 tooth (w/shipping cover), inch

B22

9 cm3/rev charge pump, SAE B 13 tooth (w/shipping cover), metricA25

9 cm3/rev charge pump, SAE B-B 15 tooth (w/shipping cover), inch

B25

9 cm3/rev charge pump, SAE B-B 15 tooth (w/shipping cover), metricANN

9 cm3/rev charge pump, none, SAE cover, inch

BNN

9 cm3/rev charge pump, none, SAE cover, metric

C16

12 cm3/rev charge pump, SAE A 9 tooth (w/shipping cover), inch

D16

12 cm3/rev charge pump, SAE A 9 tooth (w/shipping cover), metric

C19

12 cm3/rev charge pump, SAE A 11 tooth (w/shipping cover), inch

D19

12 cm3/rev charge pump, SAE A 11 tooth (w/shipping cover), metric

C22

12 cm3/rev charge pump, SAE B 13 tooth (w/shipping cover), inch

D22

12 cm3/rev charge pump, SAE B 13 tooth (w/shipping cover), metric

C25

12 cm3/rev charge pump, SAE B-B 15 tooth (w/shipping cover), inch

D25

12 cm3/rev charge pump, SAE B-B 15 tooth (w/shipping cover), metric

CNN

12 cm3/rev charge pump, none, SAE cover, inch

DNN

12 cm3/rev charge pump, none, SAE cover, metric

E16

No charge pump, SAE A 9 tooth (w/shipping cover), inch

F16

No charge pump, SAE A 9 tooth (w/shipping cover), metricE19

No charge pump, SAE A 11 tooth (w/shipping cover), inch

F19

No charge pump, SAE A 11 tooth (w/shipping cover), metric

E22

No charge pump, SAE B 13 tooth (w/shipping cover), inch

F22

No charge pump, SAE B 13 tooth (w/shipping cover), metric

E25

No charge pump, SAE B-B 15 tooth (w/shipping cover), inch

F25

No charge pump, SAE B-B 15 tooth (w/shipping cover), metricENN

No charge pump, none, SAE cover, inchFNN

No charge pump, none, SAE cover, metric

32

38

45

Align with option B (product version and unit)"Inch": option B="AS", inch O-ring boss port.
"Metric": option B="AM", metric O-ring boss port.

© Danfoss | June 2024

BC178386485160en-000603 | 61

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Model code
Model code (E - M - N - Z - L)
Prod
MP1 P

A

B

C

D

N N N

F

H

J

T

K

E

M

N

F

Z

L

V

G

W

X

Y

N N

E - displacement limiter
Code

DescriptionN

No limiters

B

Adjustable externallyC

No limiters, required for FNR, NFPE, NFPH (align with option D: control)D

Adjustable externally, required for FNR, NFPE, NFPH (align with option D: control)

Align with Y: settings if applicableM - high pressure relief setting side "A" & N - high pressure relief setting side "B"
Code

Pressure setting

140

140 bar [2030 psi]

175

175 bar [2538 psi]

190

190 bar [2755 psi]

210

210 bar [3045 psi]

230

230 bar [3336 psi]

250

250 bar [3630 psi]

260

260 bar [3770 psi]

280

280 bar [4061 psi]

300

300 bar [4350 psi]

325

325 bar [4713 psi]

345

345 bar [5000 psi]

Please contact Danfoss Power Solutions for pressures not shown or for applied pressures above max.
working pressure (see MP1 operating parameters on page 10).
Z - POR setting
Code

Description

NN

No pressure override

L - loop flushing
Code

Description

28

32

38

45

N

No loop flushing valve

X

X

X

X

B

Loop flushing; 1.6 mm orifice; 6 l/min

X

X

X

X

Align with G: system port type

62 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Model code
Model code (V - G - W)
Prod
MP1 P

A

C

B

D

N N N

F

H

J

T

K

E

M

N

F

Z

L

V

G

W

X

Y

N N

V – charge pressure relief setting
Code

Description

20

20 bar [290 psi]

22

22 bar [319 psi]

24

24 bar [348 psi]

26

26 bar [377 psi]

28

28 bar [406 psi]

Not to be used for NFPE or NFPH controls.
NFPE is 24 bar or higher; NFPH is 26 bar or higher

G - system port type
Code

Description

28

32

38

45

A1

Inch O-ring boss per ISO 11926-1

X

X

X

X

A3

Inch O-ring boss per ISO 11926-1 with integral loop flush
valve

X

X

X

X

A4

Inch O-ring boss per ISO 11926-1 with speed sensor

X

X

X

X

A5

Inch O-ring boss per ISO 11926-1 with integral loop flush
and speed sensor

X

X

X

X

B1

Split flange per ISO 6162-2, (all other O-ring boss, inch
per ISO 11926-1)

X

X

B3

Split flange per ISO 6162-2, (all other O-ring boss, inch
per ISO 11926-1) with integral loop flush valve

X

X

B4

Split flange per ISO 6162-2, (all other O-ring boss, inch
per ISO 11926-1) with speed sensor

X

X

B5

Split flange per ISO 6162-2, (all other O-ring boss, inch
per ISO 11926-1) with speed sensor and loop flush

X

X

C1

Metric O-ring boss per ISO 6149-1

X

X

X

X

C3

Metric O-ring boss per ISO 6149-1 with integral loop flush X
valve

X

X

X

C4

Metric O-ring boss per ISO 6149-1 with speed sensor

X

X

X

X

C5

Metric O-ring boss per ISO 6149-1 with speed sensor andloop flush

X

X

X

X

D1

Split flange per ISO 6162-2, (all other O-ring boss, metricper ISO 6149-1)

X

X

D3

Split flange per ISO 6162-2, (all other O-ring boss, metricper ISO 6149-1) with integral loop flush valve

X

X

D4

Split flange per ISO 6162-2, (all other O-ring boss, metricper ISO 6149-1) with speed sensor

X

X

D5

Split flange per ISO 6162-2, (all other O-ring boss, metricper ISO 6149-1) with speed sensor and loop flush

X

X

Align with B: product version and unit, and L: loop flushingW - special hardware features© Danfoss | June 2024

Code

Description

RAC

Standard valve plate, CW, 28 cm3

LAC

Standard valve plate, CCW, 28 cm3

RADStandard valve plate, CW, 32 cm3

LAD

Standard valve plate, CCW, 32 cm3

BC178386485160en-000603 | 63

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Model codeW - special hardware features (continued)
Code

Description

RAE

Standard valve plate, CW, 38 cm3

LAEStandard valve plate, CCW, 38 cm3

RAF

Standard valve plate, CW, 45 cm3

LAF

Standard valve plate, CCW, 45 cm3

RBC

NFPE/NFPH/AC valve plate, CW, 28cm3

LBC

NFPE/NFPH/AC valve plate, CCW, 28cm3

RBD

NFPE/NFPH/AC valve plate, CW, 32cm3

LBD

NFPE/NFPH/AC valve plate, CCW, 32cm3

RBE

NFPE/NFPH/AC valve plate, CW, 38cm3

LBE

NFPE/NFPH/AC valve plate, CCW, 38cm3

RBF

NFPE/NFPH/AC valve plate, CW, 45cm3

LBF

NFPE/NFPH/AC valve plate, CCW, 45cm3

Align with A: displacement and rotation : and D: controls

64 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Model code
Model code (X - Y)
Prod
MP1 P

A

B

C

D

F

N N N

H

J

T

K

E

M

F

N

Z

L

V

G

W

X

Y

N N

X - paint and name tag
Code

Description

NNNBlack paint, standard name tag

Y - settings© Danfoss | June 2024

Code

Description

NNNN

None

E095

Displacement limitation side A 95%, side B 95%

E090

Displacement limitation side A 90%, side B 90%

E085

Displacement limitation side A 85%, side B 85%

E080

Displacement limitation side A 80%, side B 80%

M00A

MDC control handle, standard orientation

M095

Displacement limitation side A 95%, side B 95%, MDC handle, standard orientation

M090

Displacement limitation side A 90%, side B 90%, MDC handle, standard orientation

M085

Displacement limitation side A 85%, side B 85%, MDC handle, standard orientation

M080

Displacement limitation side A 80%, side B 80%, MDC handle, standard orientation

AF1F

Standard propel functionality

AF2E

Standard propel functionality + ECO mode

AF1E

Standard propel functionality + ECO mode + Kubota engine protocol

AF2J

Standard propel functionality + ECO mode + cruise control + Kubota engine protocol

AF3J

Standard propel functionality + ECO mode + cruise control

AF4J

Standard propel functionality + ECO mode + cruise control

BC178386485160en-000603 | 65

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings

28/32 ports

F

M14

AM3
E
L2

M3

S MA

M5

AM3

M4

MB

A

B

L1

P400318

Port description
Port

Description

A/B

SystemAM3

Alternative charge gauge

E/F

Filtration inlet/outlet

L1/L2

Case drain

MA/MB

System gauge

M3

Charge gauge

M4/M5

Servo gauge

M14

Case gauge port

S

Charge pump inlet

66 | © Danfoss | June 2024

Code

Size

Inch

ISO 11926-1

1 1/16-12

MetricISO 6149-1

M27x2

Inch

ISO 11926-1

9/16-18

MetricISO 6149-1

M14x1.5

Inch

ISO 11926-1

9/16-18

MetricISO 6149-1

M14x1.5

Inch

ISO 11926-1

1 1/16-12

MetricISO 6149-1

M27x2

Inch

ISO 11926-1

9/16-18

MetricISO 6149-1

M14x1.5

Inch

ISO 11926-1

9/16-18

MetricISO 6149-1

M14x1.5

Inch

ISO 11926-1

7/16-20

MetricISO 6149-1

M12x1.5

Inch

ISO 11926-1

7/16-20

MetricISO 6149-1

M12x1.5

Inch

ISO 11926-1

1 1/16-12

MetricISO 6149-1

M27x2

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
38/45 ports

F

M14

B

A

AM3
E
L2

M5

AM3

M4
M3
B

MB

MA

S

A

L1

P108934

Port description
Port

Description

Code

A/B

SystemInch

ISO 11926-1

1 5/16-12

MetricISO 6149-1

M33x2

Split flange port

ISO 6162-2

DN19 M10x1.5

Inch

ISO 11926-1

9/16-18

MetricISO 6149-1

M14x1.5

Inch

ISO 11926-1

9/16-18

MetricISO 6149-1

M14x1.5

Inch

ISO 11926-1

1 1/16-12

MetricISO 6149-1

M27x2

AM3

Alternative charge gauge

E/F

Filtration inlet/outlet

L1/L2

Case drain

MA/MB

System gauge

M3

Charge gauge

M4/M5

Servo gauge

M14

Case gauge port

S

Charge Pump Inlet© Danfoss | June 2024

Size

Inch

ISO 11926-1

3/4-16

MetricISO 6149-1

M18x1.5

Inch

ISO 11926-1

9/16-18

MetricISO 6149-1

M14x1.5

Inch

ISO 11926-1

9/16-18

MetricISO 6149-1

M14x1.5

Inch

ISO 11926-1

7/16-20

MetricISO 6149-1

M12x1.5

Inch

ISO 11926-1

1 5/16-12

MetricISO 6149-1

M33x2

BC178386485160en-000603 | 67

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
28/32 dimensions
103 ± 1.5

2x 142.9 ± 1.2

4.3 +0- 0 .3.1

x.

24( 26 )

Ø1

Ma

r

he

s
wa

87.4 ± 1.5

41.2 ± 0.8

54.5 ± 0.8

2x168.3 ± 2.5

Approximate
center of gravity

20.8 ± 0.5

Approximate
center of gravity

103 ± 1.5

/
Ø
ad
he
2x
w nce
e
r
a
Sc earcl

60.6 ± 0.8(1)( 108 )
146.5 ± 1.2

2x 73 ± 0.4

Mounting flange
Flange 101-2
Per ISO 3019-1 (SAE J744 B)

Ø 101.6 0- 0.05

R 0.8 max

Paint free
9.7 0
- 0.5

68 | © Danfoss | June 2024

P400312

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45

34 ± 0.8
61.2 ± 0.8

76.3 ± 0.8

Case drain

87.5 ± 0.8

Case drain

Installation drawings

166.5 ± 1.2

78.2 ± 0.8

2x 120.5 ± 1.2

2x 116 ± 0.8

67 ± 0.854 ± 0.8

60 ± 0.8

24 ± 0.5

55.6 ± 0.8

2x 142.3 ± 1.2

78.2 ± 0.8

2x 64.2 ± 0.8

142.6 ± 1.2
166.5 ± 1.2

96 ± 0.8

2x 87 ± 0.8

Charge pump Inlet

System ports
A&B

206 ± 2.5

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 69

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
28/32 dimensions with speed sensor

ø 40 max clearance dia
for suction fitting

2x ø 14.3

87.4 ± 1.5

36 ± 0.8

2x ø 24 max
Screw head/washer
clearance

+ 0.3
– 0.1

2x 73 ± 0.4
70 ± 0.8

Speed sensor connector
DEUTSCH DTM04-6P

88 ± 0.8
112.5 ± 1.5

Please contact Danfoss representative for specific installation drawings.
Speed sensor connector
3 4
2 5
1 6

70 | © Danfoss | June 2024

Pin

Assignment

1

Speed signal 1

2

NC

3

Speed signal 2

4

Supply5Ground6

Temperature

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
38/45 dimensions
Split flange type
194 ± 1.2
2x 162.6 ± 2.5

103 ± 1.5

113.2 ± 1.5(116)

Approximate

4.3 +0- 0 .3.1x.

Ma

Approximate

24

r

he

as
/w
ad
he e
2
rew ncSc earaclxØ

169.8 ± 2.5

Ø190.7 ± 1.5

12 ± 12x

21 ± 1(27)54 ± 1.582 ± 1.2

center ofgravitycenter of gravity(2)104 ± 1.5

2x 73 ± 0.4

160.4 ± 2.5

4x 2

0.25

4x 1

1.9 ±

0°)

Paint free2x (2Ø 101.6 0-0.05

Mounting flange
Flange 101-2
per ISO 3019-1 (SAE J744 B)

5.4 ±

0.25

0
9.7 -0.5
P108935© Danfoss | June 2024

BC178386485160en-000603 | 71

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45

62 ± 0.8

Case drain

62 ± 0.8

72.2 ± 1.5
62.5 ± 1.5

Case drain

Installation drawings

191 ± 1.2

2x 117 ± 1.2

81.5 ± 1.5

81.5 ± 1.5

153 ± 2.5
181 ± 2.560 ± 1.5

24 ± 112 ± 1

2x 117.5 ± 1.5

2x 64.2 ± 0.8

84 ± 1.5

2x 143.8 ± 1.2

46 ± 1.2

104 ± 1.5

2x 88.7 ± 1.5

Charge pump Inlet

System ports
A&B

230.7 ± 2.5

P108957

72 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
O-ring boss type2x 162.6 ± 2.5
103 ± 1.5

(116)

X

113.2 ± 1.5

Approximate

Ø1

4.3 +
0
- 0 .3.1x.

Ma

Approximate

24

r

he

as
/w
ad
he e
2
rew ncSc earaclxØ

90.7 ± 1.5

21 ± 154 ± 1.5(27)

12 ± 12x169.8 ± 2.5

center ofgravitycenter of gravity(2)104 ± 1.5

2x 73 ± 0.4

160.4 ± 2.5

View X
81.5 ± 1.5

81.5 ± 1.5

2x 64.2 ± 0.8

Ø 101.6 0-0.05

2x 117.5 ± 1.5

Mounting flange
Flange 101-2
per ISO 3019-1 (SAE J744 B)

Paint free0
9.7 -0.5
104 ± 1.5

2x 88.2 ± 1.5

Charge pump Inlet

System ports
A&B
P400351

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 73

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
38/45 dimensions with speed sensor

23 ± 0.5+ 0.3
2x Ø 14.3 – 0.1

Speed sensor connector
DEUTSCH DTM04-6P

2x 73 ± 0.25

87.6 ± 0.8

2x 98.1 ± 0.8
2x 118.5 ± 2.5

Please contact Danfoss representative for specific installation drawings.
Speed sensor connector
3 4
2 5
1 6

74 | © Danfoss | June 2024

Pin

Assignment

1

Speed signal 1

2

NC

3

Speed signal 2

4

Supply5Ground6

Temperature

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Input shafts: option G4, F6 (SAE B, 13 teeth)
Option G4, F6, ISO 3019-1, Outer dia 22 mm“A”

Ø19 ± 0.13

Ø62

Spline data
Number of teeth: 13
Pitch fraction:
16/32
Pressure angle: 30°
Pitch dia:Ø20.6375
Type of fit:
Fillet root sidePer:
28/32: ANSI B92.1-1970 Class 5
38/45: ANSI B92.1-1970 Class 6e

AD

Paint free

Ø22.16± 0.06

AD

34.25
Mounting flange
Flange 101-2
Per ISO 3019-1 (SAE B)

6.85 ± 1

Mating couplingmust not protrude
beyond this point

P400321

Min. active spline length1)

28/32

38/45

A

16.17 ± 0.5

16.17 ± 0.15

1) Minimum active spline length for the specified torque ratings.

Specifications
OptionG4, F6

Spline13 teeth, 16/32 pitch

Maximum torque rating

226 N•m

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 75

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Input shafts: option G1, F1 (SAE B, 14 teeth)
Option G1, F1, ISO 3019-1, Outer dia 31.58 mm (38/45 only)

25.72 ± 0.12

ADAD

Ø 31.58 ± 0.09

30.6 ± 0.15

Major ØSpline data
Number of teeth: 14
Pitch fraction:
12/24
Pressure angle: 30°
Pitch dia:Ø29.633
Type of fit:
Fillet root sidePer:
ANSI B92.1B Class 6e

Paint freeMating couplingmust not protrude
beyond this point

6.85 ± 1
Mounting flange

49.1

Flange 101-2
Per ISO 3019-1 (SAE B)

Specifications
OptionG1, F1

Spline14 teeth, 12/24 pitch

Min. active spline length1)30.6 ± 0.15

Maximum torque rating

592 N•m [437 lbf•ft]1) Minimum active spline length for the specified torque ratings.

Please contact Danfoss representative for specific installation drawings.

76 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Input shafts: option G5, F5 (SAE B, 15 teeth)
Option G5, F5, ISO 3019-1, outer dia 23 mm
“A”

Ø62

Spline data
Number of teeth: 15
Pitch fraction:
16/32
Pressure angle: 30°
Pitch dia:Ø23.813Type of fit:
Fillet root sidePer:
28/32: ANSI B92.1-1970 Class 5
38/45: ANSI B92.1-1970 Class 6e

Ø25.34± 0.06

Ø22 ± 0.13

AD

Paint free
39.25
Mounting flange
Flange 101-2
Per ISO 3019-1 (SAE B)

6.85 ± 1

Mating couplingmust not protrude
beyond this point

P400322

Min. active spline length1)

28/32

38/45

A

23.4 ± 0.5

22.0 ± 0.15

1) Minimum active spline length for the specified torque ratings.

Specifications
OptionG5, F5

Spline15 teeth, 16/32 pitch

Maximum torque rating

362 N•m

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 77

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Input shafts: option A7, A9 (SAE B, straight key shaft)+ 0.050

Ø22.2

25.4 ± 0.8+ 0.030

Option A7, A9, ISO 3019-1, outer dia 22 mm (28/32 only)

A-A

Ø62

6.35

A

AD

A

18.58 ± 0.1
1.5 ± 0.38 x 45°

34.25
Mounting flange
Flange 101-2
Per ISO 3019-1 (SAE B)

6.85 ± 1

Mating couplingmust not protrude
beyond this point

P400323

Specifications
OptionA7, A9Maximum torque rating

226 N•m

Please contact Danfoss representative for specific installation drawings.

78 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Input shafts: option G6, G7 (SAE B, 19 teeth)
Option G6, G7, ISO 3019-1, outer dia 31.24 mm (38/45 only)

Ø72.3

Spline data
Number of teeth: 19
Pitch fraction:
16/32
Pressure angle: 30°
Pitch dia:Ø30.163
Type of fit:
Fillet root sidePer:
ANSI B92.1-1970 Class 5

AD27.7 ± 0.12

33.8 ± 0.5

Paint free

Ø 31.24 ± 0.09

AD

63.5 ± 1.5
6.85 ± 1
Mounting flange

Mating couplingmust not protrude
beyond this point
P400334

Flange 101-2
Per ISO 3019-1 (SAE B)

Specifications
OptionG6, G7

Spline19 teeth, 16/32 pitch

Min. active spline length1)

33.8 ± 0.5

Maximum torque rating

734 N•m1) Minimum active spline length for the specified torque ratings.

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 79

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Input shafts: option A6, A8 (SAE B, straight key shaft)Option A8, A6, ISO 3019-1, outer dia 1 inch (38/45 only)Ø 25.37 ± 0.025

78 ± 1.555 ± 0.8

A
Ø72.3

A-A

AD
0
6.4 -0.2

A

0
21.82 -0.2

Paint free

Mounting flange
Flange 101-2
Per ISO 3019-1 (SAE B)

6.85 ± 1

Mating couplingmust not protrude
beyond this point

P400335

Specifications
OptionA6, A8Maximum torque rating

362 N•m

Please contact Danfoss representative for specific installation drawings.

80 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Input shafts: option F2, F3 (SAE B, taper key shaft)Option F2, F3, ISO 3019-1, Code 25-3, Dia 22.2 Taper 1:8, without key, no through-hole in the end of the shaft (38/45 only)

20.1 ± 0.7
8.3 ± 1.2

3/4 - 16 UNF THD

A-A

Ø72.3

A

6.4 ± 0.05

25-3 Taper per ISO 3019-1

ADØ 22.2 Gauge

A

Paint
free

3.2 ± 0.125

26.97 ± 0.25
6.85 ± 1
Mounting flange
Flange 101-2
Per ISO 3019-1 (SAE B)

9.4 ± 0.38
Gauge
43 ± 1.5

Mating couplingmust not protrude
beyond this point

P400336

Specifications
OptionF2, F3

Maximum torque rating

497 N•m

Please contact Danfoss representative for specific installation drawings.
Tapered shaft customer acknowledgement
The Danfoss MP1 tapered shaft has been designed using the industry standard ISO 3019-1, minus thethrough-hole in the end of the shaft. Danfoss recommends a self-locking nut instead of a castle nut andpin. The nut and mating square-cut key are customer supplied.
The specified torque rating of the tapered shaft documented above is based on the cross-sectional
diameter of the shaft, through the keyway, and assumes the proper clamp and fit between shaft andcoupling. Danfoss guarantees the design and manufactured quality of the tapered shaft. The customer is
responsible for the design and manufactured quality of the mating female coupling and key and applied
torque on the nut. Danfoss has made provisions for the key in accordance to the ISO specification withthe understanding that the key is solely to assist in the installation of the mating coupling.

C Caution
Torque must be transmitted by the taper fit between the shaft and it’s mating coupling, not the key.
Torque or loading inadvertently transmitted by the customer supplied key may lead to premature shaft
failure.

© Danfoss | June 2024

BC178386485160en-000603 | 81

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Auxiliary mounting: option A16, B16, C16, D16, E16, F16 (SAE A, 9 teeth)
Option A16, B16, C16, D16, E16, F16, ISO 3019-1, flange 82-2 (SAE A, 9 teeth)“A” ± 2.5

Auxiliary mounting pad
For mating flange 82-2
Per ISO 3019-1 (SAE A)

Paint free

Spline data
Number of teeth: 9
Pitch fraction:
16/32
Pressure angle: 30°
Pitch dia:Ø14.288
Type of fit:
Fillet root sidePer:
ANSI B92.1-1970 Class 7+0.13
Ø88.621 0+0.076
Ø82.601 0

4x M10 x1.5-6H THD
15min THD depth
R0.8 max

Ref Ø82.22 ID x
2.62 cross section
Danfoss part number 9004104-1520

1.956 ± 0.076
8.1 ± 0.25
2x 53.2 ± 0.175
2x 106.4 ± 0.35

“B”
Shaft clearance

Mating shaft shoulder must not
protrude beyond this poit
Mating shaft must not
protrude beyond this poit

“C”
Shaft clearance

P400324

Location

28/32

38/45

A

210

234.5

B

11.8 min shaft clearance

12.0 min shaft clearanceC

39.0 min shaft clearance

50.0 min shaft clearance

Specifications

82 | © Danfoss | June 2024

OptionA16, B16, C16, D16, E16, F16

Spline9 teeth, 16/32 pitch

Maximum torque

107 N•m

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Auxiliary mounting: option A19, B19, C19, D19, E19, F19 (SAE A, 11 teeth)
Option A19, B19, C19, D19, E19, F19, ISO 3019-1, flange 82-2 (SAE A, 11 teeth)“A” ± 2.5

Auxiliary mounting pad
For mating flange 82-2
Per ISO 3019-1 (SAE A)

Spline data
Number of teeth: 11
Pitch fraction:
16/32
Pressure angle: 30°
Pitch dia:Ø17.463
Type of fit:
Fillet root side
ANSI B92.1-1970 Class 7
Per:

Paint free

+0.076
Ø82.601 0+0.13
Ø88.621 0

4x M10 x1.5-6H THD
15min THD depth

R0.8 max

Ref Ø82.22 ID x
2.62 cross section
Danfoss part number 9004104-1520

2x 53.2 ± 0.175
2x 106.4 ± 0.35

1.956 ± 0.076
8.1 ± 0.25

Mating shaft shoulder must not
protrude beyond this poit

“B”
Shaft clearance“C”
Shaft clearance

Mating shaft must not
protrude beyond this poit
P400325

Location

28/32

38/45

A

210

234.5

B

11.8 min shaft clearance

12.0 min shaft clearanceC

39.0 min shaft clearance

50.0 min shaft clearance

Specifications© Danfoss | June 2024

OptionA19, B19, C19, D19, E19, F19

Spline11 teeth, 16/32 pitch

Maximum torque

147 N•m

BC178386485160en-000603 | 83

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Auxiliary mounting: option A22, B22, C22, D22, E22, F22 (SAE B, 13 teeth)
Option A22, B22, C22, D22, E22, F22, ISO 3019-1, flange 101-2 (SAE B, 13 teeth)“A” ± 2.5

Auxiliary mounting pad
For mating flange 101-2
Per ISO 3019-1 (SAE B)

Paint free

4x M12 x1.75-6H THD
21.4 min THD depth+0.076
Ø101.651 0Ø107.823 +0.13
0R0.8 max

Spline data
Number of teeth: 13
Pitch fraction:
16/32
Pressure angle: 30°
Pitch dia:Ø20.638
Type of fit:
Fillet root sidePer:
ANSI B92.1-1970 Class 7

Ref Ø94.92 ID x
2.62 cross section
Danfoss part number 9004104-1540
1.956 ± 0.076
11.4 ± 0.25
2x73 ± 0.175“B”
Shaft clearance

2x 146 ± 0.35

Mating shaft shoulder must not
protrude beyond this poit
Mating shaft must not
protrude beyond this poit

“C”
Shaft clearance

P400326

Location

28/32

38/45

A

213

234.5

B

14.8 min shaft clearance

12.0 min shaft clearanceC

42.0 min shaft clearance

50.0 min shaft clearance

Specifications
OptionA22, B22, C22, D22, E22, F22

Spline13 teeth, 16/32 pitch

Maximum torque

248 N•mBolt length greater than 21.4 mm could result in a leak or damage the unit.

84 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Installation drawings
Auxiliary mounting: option A25, B25, C25, D25, E25, F25 (SAE B-B 15 teeth)
Option A25, B25, C25, D25, E25, F25, ISO 3019-1, flange 101-2 (SAE B-B, 15 teeth) (38/45 only)“A” ± 2.5

Auxiliary mounting pad
For mating flange 101-2
Per ISO 3019-1 (SAE B-B)

Paint free

4x M12 x1.75-6H THD
21.4 min THD depth+0.076
Ø101.651 0Ø107.823 +0.13
0R0.8 max

Spline data
Number of teeth: 15
Pitch fraction:
16/32
Pressure angle: 30°
Pitch dia:Ø23.813Type of fit:
Fillet root sidePer:
ANSI B92.1b-1996 Class 7e

Ref Ø94.92 ID x
2.62 cross section
Danfoss part number 9004104-1540
1.96 ± 0.08
11.4 ± 0.25
2x73 ± 0.175
2x 146 ± 0.35

“B”
Shaft clearance“C”
Shaft clearance

Mating shaft shoulder must not
protrude beyond this poit
Mating shaft shoulder must not
protrude beyond this poit
P400337

Location

38/45

A

234.5

B

12.0 min shaft clearanceC

50.0 min shaft clearance

Specifications
OptionA25, B25, C25, D25, E25, F25

Spline15 teeth, 16/32 pitch

Maximum torque347 N•mBolt length greater than 21.4 mm could result in a leak or damage the unit.

© Danfoss | June 2024

BC178386485160en-000603 | 85

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls

Electric displacement control (EDC)
Control Manual Override “C1”
Depressing the plunger mechanicallymoves the control spool. Actucation
allows full stroke pump respose as per coiland rotation dependent control logic.
Case Gauge Port “M14”206±2.5

2x 64.2±0.8

Ø21 max clearance dia for fitting
Control Solenoid
Connector “C1”
Deutsch DT04-2P
Paint free

1

Shaft

Control Solenoid
Connector “C2”
Deutsch DT04-2P
Paint free

Z (2:1)
2x

2“D” ±0.8

Mounting Flange
Control Manual Override “C2”
Depressing the plunger mechanicallymoves the control spool. Actucation
allows full stroke pump respose as per coiland rotation dependent control logic.

“B” ±1.2“A” ±1.2“C” ±2.5

Z

Mounting Flange

Shaft

P400314

Control solenoid connector “C1” & “C2”
Pin

Assignment

1
2

OR

Pin

Assignment

Supply1

GroundGround2

SupplyLocation

28/32

38/45

A

142.3

143.8

B

120.5

117

C

168.3

169.8

D

58.4

54.9

Please contact Danfoss representative for specific installation drawings.

86 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
Electric displacement control with CCO (EDC+CCO)
Control Manual Override “C1 ”
Depressing the plunger mechanicallymoves the control spool. Actuation
allows full stroke pump response as per coil androtation dependent control logic.

1

Z (2:1)
2x

Control Solenoid
Connector “C1”
Deutsch DT04-2P
Paint free“J ” ± 0.5

206 ± 2.5
39.5 ± 0.8 2x 64.2± 0.8

Case Gauge Port “M14”Ø21 max clearance dia for fitting

Shaft
2

Control Cut-Off
Connector “C4”
Deutsch DT04-2PC
Paint free1

Y (2:1)

Hydraulic logic Port” X7 “Control Solenoid
Connector “C2”
Deutsch DT04-2P
Paint free“D”± 0.8

2

Mounting flange“H”± 0.8

Control Manual Override “C2”

Depressing the plunger mechanicallymoves the control spool. Actuation
allows full stroke pump response as
per coil and rotation dependent
control logic.

Z“B”± 1.2“F”± 1.2“G”± 2.5“A” ± 1.2

“E” ± 1.2

“C” ± 2.5

Y

Mounting flange

Shaft
P400331

Control solenoid connector “C1” & “C2” & "C4"
Pin

Assignment

Pin

Assignment

1

SupplyOR

1

Ground2

Ground2

SupplyLocation

28/32

38/45

A

142.3

143.8

B

120.5

117

C

169.6

171.4

D

58.4

54.9

E

152.3

153.8

F

139.8

136.3

G

181.4

178

H

110.2

J

106.7
6.5

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 87

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
EDC with ASNSR
Case Gauge Port “M14”Ø21 max clearance dia for fitting

2x 64.2 ±0.8206.2 ±0.8

Control solenoid
connector “C1”

1

DEUTSCH DT04-2P
Paint free

X

2

3

4

14.5 ±1

Shaft

X
Control solenoid
connector “C2”
DEUTSCH DT04-2P
Paint free

Mounting flange
Angle sensor connector
DEUTSCH DTM04-4P
Paint free

F ±0.81

2

A ±1.5C ±1.2

D ±2.5Y
E ±2.5Y

B ±1.2

Mounting flange

Shaft

Control solenoid connector “C1” & “C2”
Pin

Assignment

1
2

OR

Pin

Assignment

Supply1

GroundGround2

SupplyAngle sensor connector pinout
Pin

Assignment

1

Ground (GND)2

Not connected3

Output signal 1 (SIG 1)

4

Supply (V+)

Dimensions

88 | © Danfoss | June 2024

Reference

28/32

38/45

A

32.7

29.2

B

120.5

117

C

142.3

143.8

D

169.6

171.4

E

193.3

194.8

F

58.4

54.9

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
Hydraulic displacement control (HDC)
Hydraulic Signal Port “X1”
Inch = ISO 11926-1 9/16-18
Metric = ISO 6149-1 M14x1.5

2x 87.4 ± 0.8
Hydraulic Port
“X1” & “X2”

174.8 ± 2.5

Case Gauge Port “M14”Ø21 max clearance dia for fitting

Shaft“D” ± 0.8

Mounting flange“C” ± 2.5

“A” ± 1.2

Hydraulic Signal Port “ X2 ”
Inch = ISO 11926-1 9/16-18
Metric = ISO 6149-1 M14x1.5“B” ± 0.8

Mounting flange

Shaft

P400518

Legend© Danfoss | June 2024

Dimension

28/32

38/45

A

142.3

143.8

B

92.4

88.9

C

168.3

169.8

D

58.4

54.9

BC178386485160en-000603 | 89

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
Manual displacement control (MDC)

Case gauge port “M14“

7.5±1°-0.02
3x11 -0.08

2x24±0.82x22±0.5

4x M6x1-6H Thd
9 min full thd. depth
paint free

Shaft

Mounting flange“C” ±0.8
Control Handle Shaft“D” ±0.8

Shaft“A” ±1.2“B” ±2.5+1
9.8 0“E” ±0.8“F” ±0.8

P400315

Location

28/32

38/45

A

166.8

168.3

B

209.7

211.2

C

31.9

28.4

D

49.7

46.2

E

54.9

51.4

F

82.3

78.8

Please contact Danfoss representative for specific installation drawings.

90 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
MP1 MDC with neutral start switch option: M2

Case gauge port “M14”

7.5±1°-0.02
3x11 -0.08

4x M6x1-6H thd.
9 min. full thd. depth
paint free
2x22±0.52x24±0.5

Control handle shaft

Shaft

C ±0.8

Mounting flange

D ±0.8E ±0.8F ±0.8A ±1.2

B ±2.5

9.8 +10

Neutral Start Switch connector
DEUTSCH DT04-2P
paint free

Shaft

Neutral start switch connector
Pin

Assignment

Alternate

Pin

Assignment

1

SupplyOR

1

Ground2

Ground2

SupplyDimension

28/32

38/45

A

166.8

168.3

B

209.7

211.2

C

31.9

28.4

D

49.7

46.2

E

54.9

51.4

F

82.3

78.8

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 91

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
MP1 MDC with CCO, options: M3, M4

Brake gauge port X7
ISO 11926-1 -7/16-20

Case gauge port “M14”

7.5±1°-0.02

3x11 -0.08

2x22±0.52x24±0.5

Control handle shaft

4x M6x1-6H thd.
9 min. full thd. depth
paint free

72.15±0.8

Shaft

C ±0.8

Mounting flange

D ±0.8E ±0.8F ±1.298.8 ±1.5

A ±1.2

B ±2.5

9.8 +10Control Cut Off connector C4
DEUTSCH DT04-2P
paint freeControl Cut Off connector C4
DEUTSCH DT04-2P
paint free
Shaft

Control cut off connector (C4)
Pin

Assignment

Alternate1

SupplyOR

2

GroundPin

Assignment

1

Ground2

SupplyDimension

28/32

38/45

A

166.8

168.3

B

209.7

211.2

C

31.9

28.4

D

49.7

46.2

E

54.9

51.4

F

82.3

78.8

Please contact Danfoss representative for specific installation drawings.

92 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
MP1 MDC with NSS and CCO options: M5, M6

Brake gauge port “X7”
ISO 11926-1 -7/16-20
Case gauge port “M14”

7.5±1°-0.02
3x11 -0.08

4x M6x1-6H thd.
9 min. full thd. depth
paint free
2x22±0.52x24±0.5

Control handle shaft

72.15 ±0.8

Shaft

C ±0.8D ±0.8
Mounting flange

E ±0.8
Neutral Start Switch connector
DEUTSCH DT04-2P
paint free

F ±1.2Control Cut Off connector “C4”
DEUTSCH DT04-2P
paint free

A ±1.2
B ±2.5

9.6 +1098.8 ±1.5

Control Cut Off connector “C4”
DEUTSCH DT04-2P
paint free
Shaft

Neutral start switch, control cut off connectors
Pin

Assignment

Alternate

Pin

Assignment

1

SupplyOR

1

Ground2

Ground2

SupplyDimension

28/32

38/45

A

166.8

168.3

B

209.7

211.2

C

31.9

28.4

D

49.7

46.2

E

54.9

51.4

F

82.3

78.8

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 93

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
Forward-neutral-reverse (FNR)
Control Manual Override “C1”
Depressing the plunger mechanicallymoves the control spool. Actucation
allows full stroke pump respose as per coiland rotation dependent control logic.

206±2.5

2x 64.2±0.8

Case Gauge Port “M14”Control Solenoid
Connector “C1”
Deutsch DT04-2P
Paint free

Z (2:1)
2x

1

Shaft

Control Solenoid
Connector “C2”
Deutsch DT04-2P
Paint free2

“D” ±0.8

Mounting Flange
Control Manual Override “C2”
Depressing the plunger mechanicallymoves the control spool. Actucation
allows full stroke pump respose as per coiland rotation dependent control logic.

“B” ±1.2“A” ±1.2“C” ±2.5

Z

Mounting Flange

Shaft
P400316

Control solenoid connector “C1” & “C2”
Pin

Assignment

Pin

Assignment

1

SupplyOR

1

Ground2

Ground2

SupplyDimension

28/32

38/45

A

142.3

143.8

B

120.5

117

C

168.3

169.8

D

58.4

54.9

Please contact Danfoss representative for specific installation drawings.

94 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
Non-feedback proportional electric (NFPE)
Control manual override “C1”
Depressing the plunger mechanicallymoves the control spool. Actuation
allows full stroke pump response as
per coil and rotation dependent
control logic

206 ±2.5

2x 64.2 ±0.8

Case gauge port “M14”Control solenoid
connector “C1”
Deutsch DT04-2P
paint free

Shaft CL

Control solenoid
connector “C1”
Deutsch DT04-2P
paint free

D ±0.8
Mounting flange
Control manual override “C2”
Depressing the plunger mechanicallymoves the control spool. Actuation
allows full stroke pump response as
per coil and rotation dependent
control logic

C ±2.5

A ±1.2Z

B ±1.2
Mounting flange

Shaft CL

Control solenoid connector “C1” & “C2”
Pin

Assignment

Pin

Assignment

1

SupplyOR

1

Ground2

Ground2

SupplyDimension

28/32

38/45

A

142.3

143.8

B

120.5

117

C

168.3

169.8

D

58.4

54.9

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 95

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
MP1 Non-feedback proportional hydraulic (NFPH)
Servo pressure supply port X1
Inch: 9/16-18
Metric: M14x1.5
Section A-A

Shaft

Shaft

2x 30 ± 0.8

2x A ± 1.2

C ± 2.5

Servo pressure supply port X2
Inch: 9/16-18
Metric: M14x1.5

2x B ± 1.2
Mounting flange
Shaft

96 | © Danfoss | June 2024

Dimension

28/32

38/45

A

145.3

146.8

B

96.4

92.9

C

168.3

169.8

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
Automotive control (AC)C1

V
220 ±2.5CC1110 ±1.5
61.2 ±0.8

209 max61.2 ±0.8

CAN30.2 ±0.8

CC2

CC2

CCC3
CAN

CC2

C2
CCC3

V

1

2

1

Plug removing can cause contamination issues

2

PPU wire harness is factory installed to speed sensor

Connectors description
Port

Description

C1 and C2

1. Control manual override C1
2. Control Manual Override C2

CC1

Port A control connector DEUTSCH DTM04-12P; paint free

CC2

Port B control connector DEUTSCH DTM04-12P; paint freeCC3

Control connector DEUTSCH DT06-2S; paint free; For using connector, the plug may be removed.

CAN

Control connector DEUTSCH DTM04-3P; paint free; For using connector, the plug may be removed.

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 97

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Controls
AC connectors dimensions
C1

CAN

2x 61.2 ±0.830.2 ±0.8
9.6 ±0.8

CC1

PPC

CC2

CC3

PPC

CAN
CC2

206 ±2.5

C274.5 ±0.1

CC3

PPU

PPU wire harness is factory installed to speed sensor.
CC3

CAN

PPC

Connector DEUTSCH, 2-pin

Connector DEUTSCH, 3-pin

Connector DEUTSCH, 6-pin

12

1. Digital output A1 (+)
2. Digital output A2 (-)

1

2

3

1. CAN High
2. CAN Low
3. CAN Shield

Connector DEUTSCH, 12-pin

98 | © Danfoss | June 2024

1

2

3

4

12

11

10

9

5

6

8

7

CC1
1. Battery (-)
2. Battery (+)
3. Sensor (+)
4. Sensor (-)
5. Motor rpm input (frequency)
6. Forward input (digital)
7. Reverse input (digital)
8. Sensor (+)
9. Sensor (-)
10. Drive pedal input (analog –nominal)
11. Drive pedal input (analog – red)
12. Neural input (digital)

6

1

5

2

4
3
1. Sensor A (+)
2. Analog input A
3. Sensor A (-)
4. Sensor B (-)
5. Analog input B
6. Sensor B (+)
CC2
1. Inch input (analog – red)
2. Mode switch B input (digital –nominal)
3. Motor prop/PCOR driver
4. Motor direction input (analog)
5. Sensor (+)
6. Sensor (-)
7. Inch input (analog – nominal)
8. Motor BPD driver
9. Digital output B2 (-)
10. Digital output B1 (+)
11. Mode switch A input (digital)
12. Mode switch B input (digital – red)BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Filtration

Suction filtration: option S
28/32“F” (plugged)

Charge gauge port “M3”Charge inlet port “S”
Inch : 1 1/16-12
Metric : M27x2“E” (plugged)

P400328

Please contact Danfoss representative for specific installation drawings.
38/45“F” (plugged)

Charge inlet port “S”
Inch : 1 5/16-12
Metric : M33x2“E” (plugged)
P400338

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 99

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Filtration
Remote full flow charge pressure filtration: option R
28/32

Charge filtration port “F”(to filter)

C-C/D-D

Charge gauge port “M3”

Inch: 9/16-18
Metric: M14x1.5

108.5 ± 0.4

Charge inlet port “S”
D

C

Shaft

D

Inch : 1 1/16-12
Metric : M27x2

C
Charge filtration port “E”(from filter)
Inch: 9/16-18
Metric: M14x1.5

Please contact Danfoss representative for specific installation drawings.
38/45
Charge filtration port “ F”
(to filter)
Inch: 9/16-18
Metric: M14x1.5

C-C/D-DD

D

122.6 ± 0.4

Charge inlet port “S”

Shaft

Inch: 1 5/16-12
Metric: M33x2

C

C
Charge filtration port “E”(from filter)
Inch: 9/16-18
Metric: M14x1.5

P400339

Please contact Danfoss representative for specific installation drawings.

100 | © Danfoss | June 2024

BC178386485160en-000603

Technical Information
MP1 Axial Piston Pumps Size 28/32, 38/45
Filtration
External full flow charge pressure filtration: option E
28/32“F” (plugged)

C-C

Charge gauge port “M3”108.5 ± 0.4“S” (plugged)

C

Shaft

C
External charge
inlet port “ E ”
Inch : 9/16-18
Metric : M14x1.5

P400330

Please contact Danfoss representative for specific installation drawings.
38/45“F” (plugged)

C-C

122.6 ± 0.4“S” (plugged)

Shaft

C

C
External charge
inlet port “E”
Inch : 9/16-18
Metric : M14x1.5

P400340

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC178386485160en-000603 | 101

Products we offer:

•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•

Cartridge valves
DCV directional control
valvesElectric converters
Electric machines

Danfoss Power Solutions is a global manufacturer and supplier of high-quality hydraulic andelectric components. We specialize in providing state-of-the-art technology and solutions
that excel in the harsh operating conditions of the mobile off-highway market as well as themarine sector. Building on our extensive applications expertise, we work closely with you toensure exceptional performance for a broad range of applications. We help you and othercustomers around the world speed up system development, reduce costs and bring vehicles
and vessels to market faster.

Gear motors

Danfoss Power Solutions – your strongest partner in mobile hydraulics and mobile
electrification.

Gear pumps

Go to www.danfoss.com for further product information.

Hydraulic integrated
circuits (HICs)
Hydrostatic motors

We offer you expert worldwide support for ensuring the best possible solutions foroutstanding performance. And with an extensive network of Global Service Partners, we also
provide you with comprehensive global service for all of our components.

Electric motors

Hydrostatic pumps
Orbital motors
PLUS+1® controllers
PLUS+1® displays
PLUS+1® joysticks andpedals
PLUS+1® operator
interfaces
PLUS+1® sensors
PLUS+1® software
PLUS+1® software services,support and training
Position controls andsensors
PVG proportional valves
Steering components andsystems
Telematics

Local address:

Hydro-Gear
www.hydro-gear.com
Daikin-Sauer-Danfoss
www.daikin-sauer-danfoss.com

Danfoss
Power Solutions (US) Company
2800 East 13th Street
Ames, IA 50010, USA
Phone: +1 515 239 6000

Danfoss
Power Solutions GmbH & Co. OHG
Krokamp 35
D-24539 Neumünster, Germany
Phone: +49 4321 871 0

Danfoss
Power Solutions ApS
Nordborgvej 81
DK-6430 Nordborg, Denmark
Phone: +45 7488 2222

Danfoss
Power Solutions Trading(Shanghai) Co., Ltd.
Building #22, No. 1000 Jin Hai Rd
Jin Qiao, Pudong New District
Shanghai, China 201206
Phone: +86 21 2080 6201

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

© Danfoss | June 2024

BC178386485160en-000603