Technical Information

MP1 Axial Piston Motors
Size 20/24, 28/32

www.danfoss.com

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32

Revision history

2 | © Danfoss | June 2024

Table of revisions
Date

ChangedRev

June 2024

Typo

0207

September 2023

Added New Porting Options for 28/32

0206

June 2023

Various Modifications

0205

March 2023

Fixed Notaion of Port and Drain on 28/32 Mounting Flange SAE-B and Cartridge
Style

0204

March 2023

Additional Text onto Tapered Shaft Customer Acknowledgement0203

October 2022

Minor Revision0202

October 2022

Added Size 28/32

0201

July 2022

Additional Notes for Summing System Pressure Conditions

0114

December 2021

Additional Notes for Speed Sensor

0113

June 2021

Fixed Available Sensors

0112

April 2021

Corrected Document Number and Typo

0111

February 2021

Updated Paint Free Coverage0110

December 2020

Updated Speed Limit in Operating Parameters

0109

November 2020

Updated Speed and Temperature Sensor

0108

December 2019 - April 2020 Minor Revisionxxx

November 2019

0101

First Edition

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Contents
General Description
Overview..............................................................................................................................................................................................5
Features................................................................................................................................................................................................5
System Diagram................................................................................................................................................................................6
Schematic Diagram..........................................................................................................................................................................7
Technical Specification
Design Specifications......................................................................................................................................................................8
Technical Data................................................................................................................................................................................... 8
Operating Parameters.....................................................................................................................................................................9
Fluid Specifications..........................................................................................................................................................................9
Operation
Loop Flushing Valve......................................................................................................................................................................10Anti-Cavitation and Shock Valve.............................................................................................................................................. 12
Speed and Temperature Sensor............................................................................................................................................... 13
Available Sensors......................................................................................................................................................................13
Temperature Range................................................................................................................................................................. 14
Protection Characteristics......................................................................................................................................................14
Mating Connectors...................................................................................................................................................................14
Speed Sensor 4.5 - 8 V.............................................................................................................................................................14
Speed Sensor 7 - 32 V..............................................................................................................................................................15
Sensor Position.......................................................................................................................................................................... 16
Output Pulses.............................................................................................................................................................................16
Operating Parameters
Overview........................................................................................................................................................................................... 17
Speed Ratings..................................................................................................................................................................................17
System Pressure..............................................................................................................................................................................17
Case Pressure...................................................................................................................................................................................18
Temperature.................................................................................................................................................................................... 18
Viscosity.............................................................................................................................................................................................18
System Design and Parameters
Installation........................................................................................................................................................................................ 19
Filtration............................................................................................................................................................................................ 19
Reservoir............................................................................................................................................................................................19
Overpressure Protection (Only for open circuit system)................................................................................................. 20
Summing System Pressure Conditions.................................................................................................................................. 20
Loop Flushing..................................................................................................................................................................................20
Case Pressure / Open Circuit Operation................................................................................................................................ 20
Redundant Braking System Requirement.............................................................................................................................20
Fluid Selection.................................................................................................................................................................................20
Case Drain.........................................................................................................................................................................................21
Bearing Loads and Life.................................................................................................................................................................21
Shaft Torque.....................................................................................................................................................................................21
Shaft Loads....................................................................................................................................................................................... 22
Duty Cycle and Bearing Life....................................................................................................................................................... 23
Hydraulic Equations Helpful for Motor Selection...............................................................................................................23
Determination of Nominal Motor Size................................................................................................................................... 24
Variables.......................................................................................................................................................................................24
Master Model CodeModel Code (B-C-D).......................................................................................................................................................................25
Model Code (E)................................................................................................................................................................................26
Model Code (K)................................................................................................................................................................................28
Model Code (L-M-N)......................................................................................................................................................................29
Features and Options
Shaft Options...................................................................................................................................................................................30
Installation Drawings© Danfoss | June 2024

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Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Contents
Output Shafts: Option A (SAE A, B, 13 teeth)....................................................................................................................... 31
Output Shafts: Option C (SAE A, B, 15 teeth)........................................................................................................................32
Output Shafts: Option L (SAE B, 17 teeth)............................................................................................................................. 33
Output Shafts: Option E, F (SAE A, B, Straight Key Shaft: Long).................................................................................... 34
Output Shafts: Option J, K (SAE A, B, Straight Key Shaft: Middle).................................................................................35
Output Shafts: Option G, H (SAE A, B, Taper Key Shaft)....................................................................................................36
Output Shafts: Option A (Cartridge, 13 teeth).....................................................................................................................37
Output Shafts: Option C (Cartridge, 15 teeth)..................................................................................................................... 38
Output Shafts: Option L (Cartridge, 17 teeth)......................................................................................................................39
Output Shafts: Option E, F (Cartridge, Key Shaft : Long)..................................................................................................40
Output Shafts: Option J, K (Cartridge, Key Shaft : Middle).............................................................................................. 41
Output Shafts: Option G, H, (Cartridge, Taper Key Shaft)................................................................................................ 42
Motor Rotation................................................................................................................................................................................43
MP1M20/24: Mounting Flange SAE-A.................................................................................................................................... 44
MP1M20/24: Mounting Flange SAE-B.................................................................................................................................... 46
MP1M20/24: Mounting Flange Cartridge Style...................................................................................................................48
MP1M28/32: Mounting Flange SAE-B.................................................................................................................................... 50
MP1M28/32: Mounting Flange Cartridge Style...................................................................................................................52
Gauge Port "A", "B" (20/24 only)............................................................................................................................................... 54
MP1M28/32: Axial System Port Style...................................................................................................................................... 55
MP1M28/32: Split Flange System Port Style........................................................................................................................ 56

4 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
General Description

Overview
The MP1 motor is a fixed displacement axial piston motor and is intended for closed and open circuit
medium power applications. These motors are designed primarily to be combined with other products inclosed and open circuit systems to transfer and control hydraulic power. The MP1 motor consists of four
rotating groups (displacements) and three housing (mounting) configurations. An SAE-A two bolt, SAE-B
two-bolt and a cartridge style (for space optimized gear box mounting) configuration are available.
The motor is ideally configured for installations requiring compact packaging and optimized plumbing
such as wheel ends. The standard porting configuration is twin radial O-ring boss system ports.
Features

•
•
•
•
•
•
•

Four displacements allow the optimum selection of hydraulic motor for the lowest possible installed
cost.
SAE-A & B, two bolt, and cartridge style mounting configurations available.
Metric and inch O-ring boss system port interfaces.
Optional axial O-ring boss system ports and radial split flange ports available to MP1M28/32.
Short and compact; fits into existing installation with improved porting.
Proven reliability and performance.
Worldwide sales and service.

Expanded Functionality

•
•
•
•
•

© Danfoss | June 2024

Open circuit fan drive application.
PLUS+1® Compliant speed sensor option.
Integrated flushing valve option available.
Anti-cavitation valve option available.
Shock valve option available.

BC290322888218en-000207 | 5

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
General Description
System Diagram
Pictorial system diagram

Heat exchanger
bypassReservoir

FilterHeat
exchanger

Variable
Displacement
Pump

MP1
Axial piston
Motor

Charge pressure
relief valve

Chargepump

Loop flushing valve

High pressure
relief/check valves

Suction flow

Working Loop (Low Pressure) and Charge Pressure

Case flow

Working Loop (High Pressure)P400619

The system diagram above shows the MP1 motor in a simple closed-loop hydrostatic propel application.
The motor is driven by a variable displacement pump. The motor shows an integral loop flushing optionthat will remove heat and contaminants from the system loop.

6 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
General Description
Schematic Diagram
Closed Circuit
L2

N

A

B
L1
P400620

For a close loop system, the system ports (A and B) connect to the high pressure work lines. The motor
receives pressurized fluid in its inlet port and discharges de-energized fluid through the outlet port.
Either port can act as inlet or outlet; flow is bidirectional. The motor has two case drains (L1 and L2). The
motor may include loop flushing. Loop flushing provides additional cooling and filtration capacity.
Open Circuit
L2

N

A

CCW

B
L1
P400648

An open circuit configuration is also possible for the motor and such a system is shown above. A shock
valve and an anti-cavitation valve is provided to protect the unit from sudden pressure surges as well as
cavitation. The flow path of pressurized fluid is from port A through port B. In this configuration, thedirection of rotation of the motor is counter clockwise as seen from shaft side. Similarly, if the anticavitation and shock valve is oriented in the reverse position, the direction of rotation will be clockwise.
Thus, pressurized fluid flow path is from port B through port A.

© Danfoss | June 2024

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Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Technical Specification

Design Specifications
Features

MP1 Motors

DesignAxial piston motor with fixed displacement design.

Direction of output rotation (as seen from shaft side)

Clockwise or counterclockwise

Recommended installation position

Motor installation position is discretionary, The housing must always be filled withhydraulic fluid. Consult Danfoss for non-conformance to these guidelines.

Technical Data
FeatureUnit

Model configuration
Displacement

MP1M20

MP1M24

MP1M28

MP1M3228.0 [1.71]

31.8 [1.94]

Fixed displacement motor
cm3/rev [in3/rev]

20.0 [1.22]

24.0 [1.46]

Mass moment of inertiakg•m2 [slug•ft2]
of rotating components

0.0010 [0.0007]

0.0016 [0.0011]

Mass (Weight) dry

5.6 [12]8.0 [17.6]

ISO 3019-1 flange 82-2 (SAE-A), 2 bolt
ISO 3019-1 flange 101-2 (SAE-B), 2 bolt
Cartridge mounting style

ISO 3019-1 flange 101-2 (SAE-B), 2 bolt
Cartridge mounting style

Spline 13T 16/32
Spline 15T 16/32
Spline 17T 24/48

Spline 13T 16/32
Spline 15T 16/32

kg [lb]Mounting flange

Output shaft options

Straight keyed 22.2 dia.
Tapered 22.2 dia. 1:8
ISO 11926-1, 7/8-14 (SAE O-ring boss)
System port configuration A, B

Case drain ports L1, L2

8 | © Danfoss | June 2024

ISO 11926-1, 1-1/16-12 (SAE O-ring boss)

ISO 6149-1, M22x1.5 (Metric O-ring boss)

ISO 6149-1, M27x2 (Metric O-ring boss)-

ISO 6162-2, Split flange port, DN19 M10x1.5

ISO 11926-1, 3/4-16 (SAE O-ring boss)
ISO 6149-1, M18x1.5 (Metric O-ring boss)

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Technical Specification
Operating Parameters
Parameter

Unit
Closed Circuit 1)

Speed limit

Maximummin-1(rpm)

RatedOpen Circuit
System pressure

Rated

Maximum

Maximum working pressure2)
Rated

Case pressure

4200

3900

4700

4400

3400

3100

3800

3500

380 [5429]
2 [29]

bar [psi]

Maximum

28/32

350 [5000]

bar [psi]

Maximum pressure

20/24

6 [87]

1) At the limit speed, system minimum low pressure is 18 bar.
2) Applied pressures above maximum working pressure requires Danfoss application approval.

Motor speed limit in relation to output (low) pressure

Output speed n/nmax

1.00
0.95

0.90

0.85

0.80

0

2

4

6

8

10

12

14

16

18

Outlet pressure [bar]P400718

Fluid Specifications
Features

Units
Intermittent1

Viscosity

Temperature range3

Minimum
Recommended range

20/24/28/32
5 [42]

mm2/sec. [SUS]

7 [49]
12 - 80 [66 - 370]

Maximum (cold start)2

1600 [7500]

Minimum (cold start)-40 [-40]

Recommended range
Maximum continuous°C [°F]

Maximum intermittent
Cleanliness per ISO 4406

60 - 85 [140 - 185]
104 [220]
115 [240]
22/18/13 (as per ISO 4406)

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.

© Danfoss | June 2024

BC290322888218en-000207 | 9Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Operation

Loop Flushing Valve
Closed circuit systems may require loop flushing to meet temperature and cleanliness requirements. MP1
motors are available with an optional integral loop flushing. A loop flushing valve will remove heat andcontaminants from the main loop at a rate faster than otherwise possible.
The hydraulic circuit of an MP1 motor with loop flushing option is shown below. The MP1 motor loop
flushing design is a simple spring centered shuttle spool with an orifice notch.
L2

N

A

Plug

SpringNotch

Spring guide

Spool

B
L1
P400637

A loop flush shuttle spool is used to separate system A and system B pressures. System delta pressure willcause the shuttle spool to shift, allowing the low side system pressure to flow to the orifice towards thecase. The shuttle shifts at approximately 4 bar [57 psi]. The flushing flow is a function of the low loop
system pressure and the size of the notch.
Loop flush flow options of 1.5 & 3.6 l/min [0.4 & 1.0 gal/min] are available for the 20/24cc frame size. Loopflush flow options of 5.2 and 8.0 l/min [1.4 & 2.1 gal/min] are available for the 28/32cc frame size. These
options are adequate for most applications.
When a MP1 pump is used with an external loop flushing shuttle valve, ensure that the charge setting of
the pump matches the setting of the loop flushing shuttle valve. Contact your Danfoss representative forthe availability of additional charge relief settings.
Loop flush characteristic curves(Size 20/24) 1.5 L and 3.6 L@15 bar, oil temp=50°C
5
1.5L - 50°C

Flow [L/min]

4

3.6L - 50°C

3

2

1

0

10 | © Danfoss | June 2024

0

5

10
15
System pressure _ low side [dbar]

20

25
P400656

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Operation(Size 28/32) 5.2 L and 8.0 L@15 bar, oil temp=50°C
10
5.2 L - 50°C

Flow [L/min]

8

8.0 L - 50°C

6

4

2

0

© Danfoss | June 2024

0

5

10
15
System pressure _ low side [dbar]

20

25
P400783

BC290322888218en-000207 | 11

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Operation
Anti-Cavitation and Shock ValveThe MP1M fixed motors are available with an anti-cavitation valve option. The key application for thisoption is open circuit fan drives.
The anti cavitation valve function as a check valve within the same cavity which is integrated into theendcap. The check valve function provides protection against cavitation that can occur upon
introduction of an overrunning load or due to loss of input flow. In such case, the system delta pressure
becomes negative and the check valve opens connecting the motor inlet and outlet, effectively shortcircuiting the motor. The shock valve function is intended to be used for system overpressure protection
events of limited duration only. It is not intended for continuous system pressure limitation.
The shock valve is available with 280 bar [4061 psi] or 345 bar [5004 psi] setting.
For this option the high pressure port needs to be defined upfront to get the correct motor rotation.
Reversing the motor is not possible with this option.
Flow direction
Motor shaft rotation (asseen from shaft side)

Port APort B

System Port type, Loop
Flushing & Anticavitation*

Clockwise (CW)

Out

In

MD1/MD2/SD1/SD2

Counterclockwise (CCW)

In

Out

MC1/MC2/SC1/SC2* See Master Model Code on page 25

Anti cavitation and shock valve, Port B High Pressure, Clockwise rotation
L2

N

A

CW

B

Shock valve

Anti-cavitation valve

L1
P400636

Anti-cavitationand shock valve

P400658

12 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Operation
Anti cavitation and shock valve, Port A High Pressure, Counter Clockwise rotation
L2

N

A

CCW

B
L1
P400635

Anti-cavitationand shock valve

P400660

Speed and Temperature Sensor
MP1 motors are available with an optional speed and temperature sensor. This hall-effect pulse pick-up islocated in the motor housing. The sensor accepts supply voltage and outputs a digital pulse signal in
response to the speed of the cylinder block. The output changes its high/low state as the target teeth
pass by the sensor's face. The digital (on-off-on-off) pulse train is fed to a controller, which interprets its
rate of change as a speed. A logic circuit decodes the two signals to provide an additional direction
indication (high or low) depending on direction).
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. There are
two optional sensors available.
Available Sensors
Description© Danfoss | June 2024

Order number
14905511232698

Supply voltage

4.5 – 8 V

7 – 32 V

Speed signals

Two, 90° Phase shiftTwo, 90° Phase shift

Direction signal

One

One

Temperature signal

One

One

PLUS+1 Compliance

Yes

No

BC290322888218en-000207 | 13

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Operation
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.
Protection Characteristics
Parameter

Data

Protection Code (IP class)according IEC 60529 and DIN 40050

IP 67 (without connector installed)
IP 69k (with connector installed)

EMC Emission

EN 61000-6-3

EMC Immunity (EMI)

100 V/m incl. 1 kHz AM 80 %; ISO 11452-5 and -2

ESD

EN 61000-4-2
Air discharge: 15 kV
Contact discharge: 8 kV

Vibration

30 G (294 m/s2)

Shock

50 G (490 m/s2)

Case maximum pressure

5 bar [72.5 psi]

Mating Connectors
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
Pinout:1. Speed signal 2
2. Direction signal
3. Speed signal 1
4. Supply
5. Ground
6. Temperature

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

Technical data

14 | © 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.

Pulses per revolution

NPN & PNP

Max. required supply current

–

–

25 mA

At supply voltage

Max. output current

–

–

50 mA

Operation mode

NPN & PNP

Temperature signal-40°C = 2.318V

Push-Pull amplifier–

100°C = 0.675V

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Operation
Technical data (continued)
Parameter

Min.

Nom.

Max.

Note

Output low speed signal

5%

8.5 %

12 %

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

Output high speed signal

88 %91.5 %

95 %Detectable frequency range

1 Hz

–

10 000 Hz

Ordering number

149055

Color of connector

Black

Speed Sensor 7 - 32 V
Speed Sensor 7 – 32 VDC technical data and information about connector.
Pinout:1. Speed signal 2
2. Direction signal
3. Speed signal 1
4. Supply
5. Ground
6. Temperature signal

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

Technical data
Parameter

Min.

Max.

Supply voltage range

7 VDC

32 VDC

Supply protection–

36 VDC

Max. required supply current

–

30 mA

Max. output current

–

50 mA

Operation mode

NPN open collector

Output low signal range

2%

10 %

Output high signal range

55 %

85 %

Detectable frequency range

1 Hz

10 000 Hz

Speed sensor order number

11232698

Color of connector

YellowNote

36 VDC over voltage protection-36 VDC permanent reverse
polarity protection

Internal 2k7 pull-up resistor to
supplyMax. output voltage 24 VDC

For more information, see Speed and Temperature Sensor, Technical Information, BC152886482203.

© Danfoss | June 2024

BC290322888218en-000207 | 15

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Operation
Sensor Position
Sensor position in SAE and Cartridge housing.
SAE & Cartridge housing

Speed sensor
protection
Speed sensor

Grooves on
cylinder blockP400649

Sensor target
Nine arc grooves on cylinder block as target of sensor for detection of direction (CW/CCW) and rotation.
Output Pulses
The expected number of output pulses per revolution is shown below.
The number of pulses (per rev)9

Due to the number of target groove (9) for pulse pick up, the output signal resolution is lower than otherproducts (e.g.71 target teeth for H1B-60) in extra low speed.
For more technical information, please contact your Danfoss representative.

16 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Operating Parameters

Overview
This section defines the operating parameters and limitations with regard to output speeds andpressures.
Speed Ratings
Smooth operation and output torque ripple determine the acceptable low speed operating condition.
Generally Danfoss axial piston motors will operate smoothly down to 150 rpm. In some instances, it ispossible to operate smoothly at less than 150 rpm, but performance must be verified for the specificapplication. We do not recommend that any axial piston motor be sized to operate continuously at
speeds less than 100 rpm.
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.

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.

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.

© Danfoss | June 2024

BC290322888218en-000207 | 17

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Operating Parameters
Case Pressure
Under normal operating conditions, the rated case pressure must not be exceeded. During cold start,case pressure 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, and/or housings, causing
external leakage. Performance may also be affected since charge and system pressures are referenced tocase pressure.
Case pressure limits
Maximum (continuous)

2 bar [29 psi] maximum pressure

Intermittent (cold start)

6 bar [87 psi] maximum 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 published rated temperature.
The maximum intermittent temperature is based on material properties and should never be
exceeded.
Cold oil will generally not affect the durability of the transmission components, but it may affect theability of oil to flow and transmit power.
The minimum temperature relates to the physical properties of component materials.
Size heat exchangers too keep the fluid within these limits. Danfoss recommends testing to verify thatthese temperature limits are not exceeded.
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.
Ensure fluid temperature and viscosity limits are concurrently satisfied.

18 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
System Design and Parameters

Installation
MP1 motors may be installed in any position. The motor housing must always remain full of hydraulicfluid.
Fill the motor housing and system lines with clean fluid during installation. Connect the case drain line tothe uppermost drain port (L1 or L2) to keep the housing full during operation.
To allow unrestricted flow to the reservoir, use a dedicated drain line. Connect it below the minimum
reservoir fluid level and as far away from the reservoir outlet as possible. Use plumbing adequate tomaintain case pressure within prescribed limits (see Case Pressure on page 18). To prevent premature
wear, ensure that only clean fluid enters the hydrostatic transmission circuit. A filter capable ofcontrolling the fluid cleanliness to ISO 4406, class 22/18/13 (SAE J1165) or better, under normal operating
conditions, is recommended. These cleanliness levels cannot be applied for hydraulic fluid residing in thecomponent housing/case or any other cavity upon delivery from the factory.
Filtration
To prevent damage to the MP1 motor, including premature wear, fluid entering the motor must be freeof contaminants. MP1 motors require system filtration capable of maintaining fluid cleanliness at ISO
4406-1999 class 22/18/13 or better.
Consider these factors when selecting a system filter:
Cleanliness specifications

•
•
•
•

Contaminant ingression rates
Flow capacity
Desired maintenance interval

Typically, a filter with a beta ratio of β10 = 1.5 to 2.0 is adequate. However, open circuit systems supplied
from a common reservoir may have considerably higher requirements. Because each system is unique,only a thorough testing and evaluation program can fully validate the filtration system. For more
information, see Danfoss publication Design Guidelines for Hydraulic Fluid Cleanliness,
BC152886482150.
Filter βx-ratio is a measure of filter efficiency defined by ISO 4572. It is defined as the ratio of the numberof particles greater than a given diameter (“x” in microns) upstream of the filter to the number of theseparticles downstream of the filter.

Reservoir
The reservoir provides clean fluid, dissipates heat, and removes entrained air from the hydraulic fluid. It
allows for fluid volume changes associated with fluid expansion and cylinder differential volumes.
Minimum reservoir capacity depends on the volume needed to perform these functions. Typically, acapacity of one half the charge pump flow (per minute) is satisfactory for a closed circuit system reservoir.
Open circuit systems sharing a common reservoir will require greater fluid capacity.
Locate the reservoir outlet (suction line) near the bottom, allowing clearance for settling foreign particles.
Place the reservoir inlet (return lines) below the lowest expected fluid level, as far away from the outlet as
possible.

© Danfoss | June 2024

BC290322888218en-000207 | 19

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
System Design and Parameters
Overpressure Protection (Only for open circuit system)
MP1 motors have shock valves intended to be used for system over-pressure limitation. However, it is notintended for continuous system pressure limitation. Therefore, relief valves or pressure limiters are
required to maintain system pressure within prescribed limits. Relief valves are adequate to protect
against transient or unusually rapid load application, but excessive or continuous flow through themadds heat to the system and can damage the fluid. In applications operating at or near pressure, use apressure compensating variable pump. The shock valve function is intended to be used for system
overpressure protection events of limited duration only. It is not intended for continuous system pressure
limitation. The shock valve is available with 280 bar or 345 bar setting.
Summing System Pressure Conditions
The sum of system pressure, i.e., system high pressure loop + system low pressure loop must be less than
500 bar for 20cc/24cc/28cc and 450 bar for 32cc. Especially in the application where the motors are inseries, make sure that the sum pressure of port A and B for each motor does not exceed this value.
In case of designing the series circuit with MP1 motors, please ask Danfoss PAE before applying them inthe system.
Loop Flushing
Closed circuit systems may require loop flushing to meet temperature and cleanliness requirements. A
loop flushing valve removes hot fluid from the low pressure side of the system loop for additional coolingand filtering. Ensure the charge pump provides adequate flow for loop flushing and the loop flushingvalve does not cause charge pressure to drop below recommended limits.
Case Pressure / Open Circuit Operation
MP1 motors can be operated with zero pressure in the low side of the system loop. The case pressuremust not be higher than 2 bar over the low side loop system pressure. With zero backpressure, themaximum allowed case pressure is 2 bar [29 psi]. Case drain lines must be plumbed accordingly to insure
this 2 bar case pressure differential is not exceeded under any circumstances.
Redundant Braking System Requirement

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 are based on operating with hydraulic fluids containing oxidation, rustand foam inhibitors. These fluids must possess good thermal and hydrolytic stability to prevent wear,
erosion, and corrosion of motor components.

C Caution
Never mix hydraulic fluids of different types.

20 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
System Design and Parameters
Case Drain
A case drain line must be connected to the case outlets of each motor to return the internal leakage oil tothe system reservoir. When filling the case before start up, use the highest case drain outlet to promotecomplete filling of the case. The case drain fluid is typically the hottest fluid in the system. It is highly
recommended to route the case drain flow through a heat exchanger before it is returned to thereservoir.
In some applications, it may be required to provide additional cross-flushing of the motor. If the motor isused mainly in a high speed application, higher cooling requirements may be needed for the rotating kit
and tapered roller bearings. Use the lowest case drain port as the inlet port and the highest case drain
port as the outlet port. This will ensure that the case is full of oil at all times.
Apply unit case pressure ratings to case drain routing and design.
Bearing Loads and Life
Bearing life is a function of speed, system pressure and any external side or thrust loads. External sideloads are found in some applications such as a helical gear without its own support bearings, installed
directly on to the motor shaft. All external side loads will act to reduce the normal bearing life of the
motor. Other life factors include oil type and viscosity.
When external side loads are present, 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 operatingpressures of the hydraulic unit. In applications where external shaft loads cannot be avoided, the impact
on bearing life can be minimized by proper orientation of the load. Optimal motor orientation is aconsideration of the net loading on the shaft from the external load and the motor rotating kit.
Contact Danfoss for a bearing life review if external side loads and thrust loads are present.
Shaft Torque
Available shafts are capable to transmit the maximum torque capability at maximum working pressure.
Lubrication or similar treatment of splined motor shaft is recommended for proper torque transmission.
For more information, see Lubrication of Splined Shafts, Data Sheet, AI152986482538.

© Danfoss | June 2024

BC290322888218en-000207 | 21

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
System Design and Parameters
Shaft Loads
MP1 motors have bearings capable of accepting some external radial and thrust loads. The external radial
shaft load limits are a function of the load position, orientation, and the operating conditions of the
motor.
Shaft external load limits
Frame

20/24

Mounting configuration

SAE

Cartridge

28/32
SAE

Cartridge

41

153

363

1354

Maximum allowable external moment (Me)

N•M

31

104

lbf•in274

920

Maximum allowable thrust load (T)

N

1000

1500

lbf

225

337

All external shaft loads have an effect on bearing life. In motor applications where external shaft loads
cannot be avoided, the impact on bearing life can be minimized by orienting the load to the 180 degree
position (see Direction of external shaft load, next page).
Radial load formula
Me = Re•L
L = Distance from mounting flange to point of load
Me = Maximum external moment
Re = Maximum radial side load
Shaft load orientation

L

0° Re
Re

Tin

Mounting Flange

Tout

90° Re270° Re

180° ReP400657

22 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
System Design and Parameters
Duty Cycle and Bearing LifeAll shaft loads affect bearing life. We recommend tapered shafts or clamp-type couplings for applications
with radial shaft loads.
Knowing the operating conditions of your application is the best way to ensure proper motor selection.
With accurate duty cycle information, your Danfoss representative can assist in calculating expected
motor life.
Hydraulic Equations Helpful for Motor Selection
Use the following equations to compute output power, torque, speed, and input flow. Selecting the rightmotor starts with an evaluation of system requirements such as speed and torque. Select a motor thatwill transmit the required torque, then select a pump that will meet the flow and pressure requirementsof the motor.

© Danfoss | June 2024

BC290322888218en-000207 | 23

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
System Design and Parameters
Determination of Nominal Motor Size
The following equations are used to compute the input flow, output torque, output power and speed.
Generally, sizing the right motor starts with an evaluation of the machine requirements such as speed
and torque. Select a motor that will transmit the required torque, then select a pump that will meet theflow and pressure requirements of the motor.
Unit:

Metric System:
Vg • nQe =Output torqueMe =Output power

Pe =

Speed

n=

1000 • η v
Vg • ∆p • η m
20 • πQe • ∆p • η t
600
Qe • 1000 • η v
VgInch SystemVg • n

l/min

Qe =

Nm

Me =

kW

Pe =

min-1

n=

231 • η v
Vg • ∆p • η m
2•πVg • n • ∆ p • η t
396 000
Qe • 231 • η v
Vg

[gpm]

[lbf•in]

[hp]

(rpm)

Variables

SI units [US units]
Qe = Input flow l/min (US gal/min)
Me = Output torque N•m (lbf•in)
pe = Output power kW (hp)n = Speed min-1 (rpm)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]ηv = Volumetric efficiency
ηmh = Mechanical-hydraulic efficiency
ηt = Motor total efficiency (ηv • ηmf)

24 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Master Model CodeModel Code (B-C-D)
Prod B
MP1 M

C

D

E

K

L

M

N

B - Configuration
Code

Description

F

Mounting Flange: SAE Flange

C

Mounting Flange: CARTRIDGE Flange

C - Displacement
Code

Description

020N

20 cm3/rev [1.22 in3/rev]

024N

24 cm3/rev [1.46 in3/rev]

028N

28 cm3/rev [1.71 in3/rev]

032N

31.8 cm3/rev [1.94 in3/rev]

D - Output Shaft© Danfoss | June 2024

Code

DescriptionA

13 tooth 16/32 pitch per ANSI B92.1-1970 class 5 without dust sealC

15 tooth 16/32 pitch per ANSI B92.1-1970 class 5 without dust sealE

Round straight keyed 22.2 mm (long) without dust sealF

Round straight keyed 22.2 mm (long) with dust seal

G

Tapered 22.2 mm without dust seal

H

Tapered 22.2 mm with dust sealJ

Round straight keyed 22.2 mm (middle) without dust sealK

Round straight keyed 22.2 mm (middle) with dust sealL

17 tooth 24/48 pitch per ANSI B92.1 class 6 without dust seal

20

24

28

32

BC290322888218en-000207 | 25

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Master Model CodeModel Code (E)Prod B
MP1 M

C

D

E

K

L

M

N

E - System Port Type, Loop Flushing & Anti-Cavitation

26 | © Danfoss | June 2024

Code

Description

SA1

Radial System Ports, O-ring boss (Inch), Defeated Loop Flushing Valve

20

SB1

Radial System Ports, O-ring boss (Inch), Loop Flushing (1.5 lpm @ 15 bar)

SB2

Radial System Ports, O-ring boss (Inch), Loop Flushing (3.6 lpm @ 15 bar)

SB3

Radial System Ports, O-ring boss (Inch), Loop Flushing (5.2 lpm @ 15 bar)

SB4

Radial System Ports, O-ring boss (Inch), Loop Flushing (8.0 lpm @ 15 bar)

SC1

Radial System Ports, O-ring boss (Inch), Anti-cavitation, Port A, 280 bar shock valve

SC2

Radial System Ports, O-ring boss (Inch), Anti-cavitation, Port A, 345 bar shock valve

SD1

Radial System Ports, O-ring boss (Inch), Anti-cavitation, Port B, 280 bar shock valve

SD2

Radial System Ports, O-ring boss (Inch), Anti-cavitation, Port B, 345 bar shock valve

SE1

Radial System Ports, O-ring boss (Inch), Gauge Ports, None

SF1

Axial System Ports, O-ring boss (Inch), Defeated Loop Flushing Valve

SG3

Axial System Ports, O-ring boss (Inch), Loop Flushing (5.2 lpm @ 15 bar)

SG4

Axial System Ports, O-ring boss (Inch), Loop Flushing (8.0 lpm @ 15 bar)

SH1

Axial System Ports, O-ring boss (Inch), Anti-cavitation, Port A, 280 bar shock valve

SH2

Axial System Ports, O-ring boss (Inch), Anti-cavitation, Port A, 345 bar shock valve

SJ1

Axial System Ports, O-ring boss (Inch), Anti-cavitation, Port B, 280 bar shock valve

SJ2

Axial System Ports, O-ring boss (Inch), Anti-cavitation, Port B, 345 bar shock valve

MA1

Radial System Ports, O-ring boss (Metric), Defeated Loop Flushing Valve

MB1

Radial System Ports, O-ring boss (Metric), Loop Flushing (1.5 lpm @ 15 bar)

MB2

Radial System Ports, O-ring boss (Metric), Loop Flushing (3.6 lpm @ 15 bar)

MB3

Radial System Ports, O-ring boss (Metric), Loop Flushing (5.2 lpm @ 15 bar)

MB4

Radial System Ports, O-ring boss (Metric), Loop Flushing (8.0 lpm @ 15 bar)

MC1

Radial System Ports, O-ring boss (Metric), Anti-cavitation, Port A, 280 bar shock valve

MC2

Radial System Ports, O-ring boss (Metric), Anti-cavitation, Port A, 345 bar shock valve

MD1

Radial System Ports, O-ring boss (Metric), Anti-cavitation, Port B, 280 bar shock valve

MD2

Radial System Ports, O-ring boss (Metric), Anti-cavitation, Port B, 345 bar shock valve

MF1

Axial System Ports, O-ring boss (Metric), Defeated Loop Flushing Valve

MG3

Axial System Ports, O-ring boss (Metric), Loop Flushing (5.2 lpm @ 15 bar)

MG4

Axial System Ports, O-ring boss (Metric), Loop Flushing (8.0 lpm @ 15 bar)

MH1

Axial System Ports, O-ring boss (Metric), Anti-cavitation, Port A, 280 bar shock valve

MH2

Axial System Ports, O-ring boss (Metric), Anti-cavitation, Port A, 345 bar shock valve

MJ1

Axial System Ports, O-ring boss (Metric), Anti-cavitation, Port B, 280 bar shock valve

MJ2

Axial System Ports, O-ring boss (Metric), Anti-cavitation, Port B, 345 bar shock valve

24

28

32

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Master Model CodeE - System Port Type, Loop Flushing & Anti-Cavitation (continued)
Code© Danfoss | June 2024

Description

FA1

Radial Split flange System Ports, Defeated Loop Flushing Valve

FB3

Radial Split flange System Ports, Loop Flushing (5.2 lpm @ 15 bar)

20

FB4

Radial Split flange System Ports, Loop Flushing (8.0 lpm @ 15 bar)

FC1

Radial Split flange System Ports, Anti-cavitation, Port A, 280 bar shock valve

FC2

Radial Split flange System Ports, Anti-cavitation, Port A, 345 bar shock valve

FD1

Radial Split flange System Ports, Anti-cavitation, Port B, 280 bar shock valve

FD2

Radial Split flange System Ports, Anti-cavitation, Port B, 345 bar shock valve

24

28

32

BC290322888218en-000207 | 27

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Master Model CodeModel Code (K)Prod B
MP1 M

C

D

E

K

L

M

N

K - Mounting Flange & Case Drain, Speed Sensing

28 | © Danfoss | June 2024

Code

DescriptionAN

SAE 'A' Flange (Inch), Speed Sensor NoneAA

SAE 'A' Flange (Inch), with Speed Sensor (4.5-8V)

AB

SAE 'A' Flange (Inch), with Speed Sensor (4.5-8V), guard

AC

SAE 'A' Flange (Inch), with Speed Sensor (7-32V)AD

SAE 'A' Flange (Inch), with Speed Sensor (7-32V), guardBN

SAE 'B' Flange (Inch), Speed Sensor NoneBA

SAE 'B' Flange (Inch), with Speed Sensor (4.5-8V)BB

SAE 'B' Flange (Inch), with Speed Sensor (4.5-8V), guardBC

SAE 'B' Flange (Inch), with Speed Sensor (7-32V)BD

SAE 'B' Flange (Inch), with Speed Sensor (7-32V), guard

CN

Cartridge Flange (Inch), Speed Sensor NoneCA

Cartridge Flange (Inch), with Speed Sensor (4.5-8V)

CB

Cartridge Flange (Inch), with Speed Sensor (4.5-8V), guard

CC

Cartridge Flange (Inch), with Speed Sensor (7-32V)

CD

Cartridge Flange (Inch), with Speed Sensor (7-32V), guard

DN

SAE 'A' Flange (Metric), Speed Sensor NoneDA

SAE 'A' Flange (Metric), with Speed Sensor (4.5-8V)

DB

SAE 'A' Flange (Metric), with Speed Sensor (4.5-8V), guardDC

SAE 'A' Flange (Metric), with Speed Sensor (7-32V)DD

SAE 'A' Flange (Metric), with Speed Sensor (7-32V), guardEN

SAE 'B' Flange (Metric), Speed Sensor None

EA

SAE 'B' Flange (Metric), with Speed Sensor (4.5-8V)EB

SAE 'B' Flange (Metric), with Speed Sensor (4.5-8V), guardEC

SAE 'B' Flange (Metric), with Speed Sensor (7-32V)ED

SAE 'B' Flange (Metric), with Speed Sensor (7-32V), guard

FN

Cartridge Flange (Metric), Speed Sensor NoneFA

Cartridge Flange (Metric), with Speed Sensor (4.5-8V)

FB

Cartridge Flange (Metric), with Speed Sensor (4.5-8V), guard

FC

Cartridge Flange (Metric), with Speed Sensor (7-32V)

FD

Cartridge Flange (Metric), with Speed Sensor (7-32V), guard

20

24

28

32

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Master Model CodeModel Code (L-M-N)
Prod B
MP1 M

C

D

E

K

L

M

N

L - Setting
Code

Description

NNN

None

M - Special Hardware Features
Code

Description

20A

Cylinder block Kit, 20cc standard

24A

Cylinder Block Kit, 24cc standard

28A

Cylinder block Kit, 28cc standard

32A

Cylinder block Kit, 31.8cc standard

N - Paint and Nametag© Danfoss | June 2024

Code

Description

NNNBlack Paint and Danfoss Nametag

C08

Paint None and Danfoss Nametag

BC290322888218en-000207 | 29

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Features and Options

Shaft Options
MP1 motors are available with a variety of splined, straight keyed, and tapered shaft ends. Nominal shaft
sizes and torque ratings for some available shafts are shown in the accompanying table.
Torque ratings assume no external radial loading.Continuous torque ratings for splined shafts are basedon spline tooth wear, and assume the mating spline has a minimum hardness of Rc 55 to full spline depth
and coupling has good lubrication.
Maximum torque ratings are based on shaft torsional strength and assume a maximum of 200,000 load
reversals.
Shaft availability and maximum torque ratings
Shaft optionN•m [lbf•in]Spline, 13 tooth, 16/32 pitch

226 [2000]

Spline, 15 tooth, 16/32 pitch

362 [3200]

Spline, 17 tooth, 24/48 pitch

165 [1460]

Tapered, Ø22.2 mm

362 [3200]

Straight keyed, Ø22.2 mm

226 [2000]

Recommended mating splines for MP1 motor splined output shafts should be in accordance with ANSI
B92.1. Refer to the shaft option drawings for detailed specifications of each spline.

30 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings

Output Shafts: Option A (SAE A, B, 13 teeth)
Option A, ISO 3019-1, Outer dia 21.72 mm
Spline data
16.5 ± 0.5
Full spline length

8±1

Paint
free

Ø21.72 ± 0.09

Ø18.7 ± 0.12

ØD13 teeth 16/32 pitch
30° pressure angle
Ø 20.638 pitch dia.
filler root side fit
per ANSI B92.1-1970
Class 5Mating couplingmust not protrude
beyond this point
Mounting flange
Flange 82-2 (SAE-A)
Flange 101-2 (SAE-B)
per ISO 3019-1

33 ± 0.3

P400638

ØD

20/24

28/32

52 +0.030

62 +0.03
0Specifications
OptionA

Spline13 teeth, 16/32 pitch

Torque rating

Maximum

226 N•m (2000 lbf-in)

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 31

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option C (SAE A, B, 15 teeth)
Option C, ISO 3019-1, Outer dia 24.9 mm
Spline data
15 teeth 16/32 pitch
30° pressure angle
Ø 23.813 pitch dia.
filler root side fit
per ANSI B92.1-1970 Class 5

8±1

ØD

Paint
free

38 ± 0.3

0Ø24.9 -0.2

Ø22 ± 0.13

ØD

16.5 ± 0.5
Full spline length

Mating couplingmust not protrude
beyond this point

Mounting flange
Flange 82-2 (SAE-A)
Flange 101-2 (SAE-B)
per ISO 3019-1

20/24

28/32

52 +0.030

62 +0.03
0P400639

Specifications
OptionC

Spline15 teeth, 16/32 pitch

Torque rating

Maximum

362 N•m (3200 lbf-in)

Please contact Danfoss representative for specific installation drawings.

32 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option L (SAE B, 17 teeth)
Option L, ISO 3019-1, Outer dia 19.05 mm
24.6 ± 0.5
Full spline length

5.1 ± 1

Paint
free
35.4 ± 0.30Ø19.05 -0.23

Ø15.5 ± 0.15

Ø52 +0.03
0Spline data
17 teeth 24/48 pitch
30° pressure angle
Ø 17.991 pitch dia.
filler root side fit
per ANSI B92.1-1970 Class 6

Mating couplingmust not protrude
beyond this point

Mounting flange
Flange 82-2 (SAE-A)
Flange 101-2 (SAE-B)
per ISO 3019-1

P400661

20/24
Full spline length24.6 ± 0.5

Specifications
C

Option17 teeth, 24/48 pitch

SplineTorque rating

Maximum

165 N•m (1460 lbf-in)

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 33

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option E, F (SAE A, B, Straight Key Shaft: Long)
Option E, F, ISO 3019-1, Outer dia 22.2 mm

Full RA-A
Ø52 +0.03
0A

6.35 +0.05
041.7 ± 0.8

Paint
free
11.5 ± 1

63 ± 0.3

Ø22.2 +0.03
0A
18.58 ± 0.1

1.5 ± 0.4 x 45°
Mating couplingMust not protrude
beyond this point
Mounting flange
Flange 82-2 (SAE-A)
Flange 101-2 (SAE-B)
per ISO 3019-1

P400641

Specifications
E, F

OptionTorque rating

Maximum

226 N•m (2000 lbf-in)

Please contact Danfoss representative for specific installation drawings.

34 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option J, K (SAE A, B, Straight Key Shaft: Middle)

Ø22.2 +0.03
028.1 ± 0.8
Full R

A-A
ØD

A

6.35 +0.05
0Option J, K, ISO 3019-1, Outer dia 22.2 mm

A
18.58 ± 0.1
Paint free

11.5 ± 1

ØD

49 ± 0.3

1.5 ± 0.4 x 45°
Mating couplingMust not protrude
beyond this point
Mounting flange
Flange 82-2 (SAE-A)
Flange 101-2 (SAE-B)
per ISO 3019-1
P400640

20/24

28/32

52 +0.030

62 +0.03
0Specifications
J, K

OptionTorque rating

Maximum

226 N•m (2000 lbf-in)

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 35

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option G, H (SAE A, B, Taper Key Shaft)
Output Shafts: Option G, H (SAE A, B, Taper Key Shaft)

2x Full R
A-A
ØD

Ø22.2
A

(Gauge)A

6.4 ± 0.05

8.93 ± 0.38
(Gauge)3.2 ± 0.125
3/4 - 16 UNF THD
20 +0.40

4.9 ± 0.2

125 ± 0.5 Taper per 1000

Paint
free
11.5 ± 1
41.2 ± 1

26.97 ± 0.25

Mating couplingmust not protrude
beyond this point
Mounting flange
Flange 82-2 (SAE-A)
Flange 101-2 (SAE-B)
per ISO 3019-1
P400647

ØD

20/24

28/32

52 +0.030

62 +0.03
0Specifications
G, H

OptionTorque rating

Maximum

362 N•m (2000 lbf-in)

Please contact Danfoss representative for specific installation drawings.

36 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option A (Cartridge, 13 teeth)
Option A, ISO 3019-1, Outer dia, 21.72mm
Spline data
13 teeth 16/32 pitch
30° pressure angle
Ø 20.638 pitch dia.
filler root side fit
per ANSI B92.1-1970
Class 5L

33 ± 0.3

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

Ø21.72 ± 0.09

Paint free

Ø18.7 ± 0.12

ØD

16.5 ± 0.5
Full spline length

Mating couplingMust not protrude
beyond this point

P400642

20/24

28/32

ØD

52 +0.030

62 +0.030L68.3±182.6±1

Specifications
OptionA

Spline13 teeth, 16/32 pitch

Torque rating

Maximum

226 N•m (2000 lbf-in)

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 37

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option C (Cartridge, 15 teeth)
Option C, ISO 3019-1, Outer dia 24.9 mm
Spline data
15 teeth 16/32 pitch
30° pressure angle
Ø 23.813 pitch dia.
filler root side fit
per ANSI B92.1-1970
Class 5

16.5 ± 0.5

LØ22 ± 0.13

Paint
free

0
Ø24.9 -0.2

ØDFull spline length

38 ± 0.3

Mating couplingmust not protrude
beyond this point

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

P400643

20/24

28/32

ØD

52 +0.030

62 +0.030L68.3±182.6±1

Specifications
OptionC

Spline15 teeth, 16/32 pitch

Torque rating

Maximum

362 N•m (3200 lbf-in)

Please contact Danfoss representative for specific installation drawings.

38 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option L (Cartridge, 17 teeth)
Option L, ISO 3019-1, Outer dia 19.05 mm
24.6 ± 0.5

Spline data

Full spline length

65 ± 1

Paint
free

0
Ø19.05 -0.23

Ø15.5 ± 0.15

Ø52 +0.03
017 teeth 24/48 pitch
30° pressure angle
Ø 17.991 pitch dia.
filler root side fit
per ANSI B92.1-1970 Class 6

Mating couplingmust not protrude
beyond this point
Mounting flange

35.4 ± 0.3

Flange 101-2 (SAE-B)
per ISO 3019-1
P400662

Specifications
OptionL

Spline17 teeth, 24/48 pitch

Torque rating

Maximum

165 N•m (1460 lbf-in)

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 39

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option E, F (Cartridge, Key Shaft : Long)
Option E, F, ISO 3019-1, Outer dia 22.2 mm
41.7 ± 0.8

A-AØ52 +0.03
0A

6.35 +0.05
0Full R

18.58 ± 0.1
Ø22.2 +0.03
0A

Paint free
71.8 ± 1

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

63 ± 0.3

1.5 ± 0.4 x 45°

Mating couplingMust not protrude
beyond this point
P400644

Specifications
E, F

OptionTorque rating

Maximum

226 N•m (2000 lbf-in)

Please contact Danfoss representative for specific installation drawings.

40 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option J, K (Cartridge, Key Shaft : Middle)
Option J, K, ISO 3019-1, Outer dia 22.2 mm

Full R
A-A

ØD

A

6.35 +0.05
028.1 ± 0.8

18.58 ± 0.1
Ø22.2 +0.03
0A

Paint free

1.5 ± 0.4 x 45°

49 ± 0.3

L

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

Mating couplingMust not protrude
beyond this point

P400645

20/24

28/32

ØD

52 +0.030

62 +0.030L71.8±186.1±1

Specifications
J, K

OptionTorque rating

Maximum

226 N•m (3200 lbf-in)

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 41

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Output Shafts: Option G, H, (Cartridge, Taper Key Shaft)Option G, H, ISO 3019-1, Outer dia 22.2 mm, 125+-0.5 Taper per 1000

8.93 ± 0.38
(Gauge)A-A

A

3.2 ± 0.125
20 +0.4
0

Paint freeLØD

Ø22.2 +0.03
0(Gauge)A

6.4 ± 0.05

2x Full R 3/4 - 16 UNF THD

4.9±0.2

125 ± 0.5 Taper per 1000
26.97 ± 0.25

Mating couplingMust not protrude
beyond this point

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

ØD

20/24

28/32

52 +0.030

62 +0.030L71.8±186.1±1

M

101.5±1117.1±1

P400646

Specifications
G, H

OptionTorque rating

Maximum

362 N•m (3200 lbf-in)

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. Maximum retaining nut tightening torque: 340 N･m (3000 lbf･in) Any torque in excessof this may lead to shaft damage. Danfoss has made provisions for the key in accordance to the ISO
specification with the 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.

42 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Motor Rotation
Rotation by flow direction© Danfoss | June 2024

Port APort B

Motor shaft rotation

Out

In

Clockwise (CW)

In

Out

Counterclockwise (CCW)

BC290322888218en-000207 | 43

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
MP1M20/24: Mounting Flange SAE-A

2x 131 ± 1.2

R0.75 Max

System port “A”

45

°±

5°

30 ±0.50Ø 82.55 - 0.05

30 ±0.5

Port ISO 11926-1 7/8-14
Port ISO 6149-1 M22x1.5

System port “B”

0.8 ± 0.5

Port ISO 11926-1 7/8-14
Port ISO 6149-1 M22x1.5

0
6.4 - 0.5
12 ± 1±
45°

Mounting flange
Flange 82-2
Per ISO 3019-1 (SAE A)

2°

76 ± 241 ± 2

Speed sensor connector

Center of speed
sensor connector

93 ± 1.5

Paint free(Center of speed sensor)

Case drain port “L1”

A

A

(2)

59.5 ±0.8

Speed
sensorApproximate
center of gravith

57 ±1.584 ± 295 ± 2

Port ISO 11926-1 3/4-16
Port ISO 6149-1 M18x1.5

System port
“A” & “B”

Approximate
center of gravith

(2)

(85)
Name plate
Paint free
59 ± 1.559 ± 1.5

Paint free

93 ± 0.8147 ± 1.2
P400629

Please contact Danfoss representative for specific installation drawings.

44 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Ø 95 ± 1.5+ 0.3
2x Ø 11.1 - 0.1

CCW

CW

B

B
53.2 ± 0.3

53.2 ± 0.3

65 ± 1.5

Case drain port “L2”Port ISO 11926-1 3/4-16
Port ISO 6149-1 M18x1.5

93 ± 0.8
65 ± 1.5

B-B

A-A
Shaft CL
±2

°

70

±

0.

8

70

±

0.

8

45°

45°

±2

°

Shaft CL
P400630

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 45

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
MP1M20/24: Mounting Flange SAE-B

2x 131 ± 1.2

R0.75 Max

System port “A”

45

°±

5°

30 ±0.50Ø 101.6 - 0.05

30 ±0.5

Port ISO 11926-1 7/8-14
Port ISO 6149-1 M22x1.5

1.5 ± 0.5

System port “B”
Port ISO 11926-1 7/8-14
Port ISO 6149-1 M22x1.5

09.7 - 0.5
12 ± 1

45°±

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

2°

76 ± 293 ± 1.5

Approximate
center of gravith

Paint free

Approximate
center of gravith

Case drain port “ L1”
Port ISO 11926-1 3/4-16
Port ISO 6149-1 M18x1.5
59.5 ± 0.8

Speed
sensor(Center of speed sensor)

AA

57 ± 1.584 ± 295 ± 2(2)

Speed sensor connector(2)

Center of speed
sensor connector

System port
“A” & “B”

41 ± 2

Paint free(83)

59 ± 1.559 ± 1.593 ± 0.8
Name plate
Paint free

147 ± 1.2

P400631

Please contact Danfoss representative for specific installation drawings.

46 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Ø 120 ± 1.5+ 0.3
2x Ø 14.3 - 0.1

CCW

B

CW

B
73 ± 0.373 ± 0.387 ± 1.5

Case drain port “L2”Port ISO 11926-1 3/4-16
Port ISO 6149-1 M18x1.5

93 ± 0.887 ± 1.5

B-B

A-A
Shaft CL

±2

°

70

±

0.

8

70

±

0.

8

45°

45°

±2

°

Shaft CL
P400632

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 47

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
MP1M20/24: Mounting Flange Cartridge Style

2x 70.7 ± 1.2

R0.75 Max

System port “A”

45

°±

5°

30 ±0.50Ø 101.6 - 0.05

30 ±0.5

Port ISO 11926-1 7/8-14
Port ISO 6149-1 M22x1.5

1.5 ± 0.5
09.7 - 0.5

System port “B”
Port ISO 11926-1 7/8-14
Port ISO 6149-1 M22x1.5

°

2
5° ±

12 ± 166.7 ± 1.2

4

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

90 ± 241 ± 2Center of speed
sensor connector

32.7 ± 1.5

Speed sensor connector(Center of speed sensor)

Paint free

A

A

(2)

59.5 ± 0.8Port ISO 11926-1 3/4-16
Port ISO 6149-1 M18x1.5

57 ± 1.5

107 ± 284 ± 2Speed
sensorApproximate
center of gravith

Case drain port “L1”

System port
“A” & “B”

Approximate
center of gravith(2)

Paint free(27)

59 ± 1.559 ± 1.5

Name plate
Paint free

32.7 ± 0.8
86.7 ± 1.2
P400633

Please contact Danfoss representative for specific installation drawings.

48 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings

Ø 120 ± 1.5+ 0.3
2x Ø 14.3 - 0.1

CCW

CW

B

B
73 ± 0.373 ± 0.387 ± 1.587 ± 1.5

32.7 ± 0.8

Case drain port “L2”Port ISO 11926-1 3/4-16
Port ISO 6149-1 M18x1.5

A-A

B-B
Shaft CL

±2

°

70

±

0.

8

70

±

0.

8

45°

45°

Shaft CL
±2°

P400634

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 49

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
MP1M28/32: Mounting Flange SAE-B

2x 147.6 ± 1.2

System port “A”

R0.75 Max

45

°±

5°

35 ±0.5

Ø101.6 0- 0.0535 ±0.5

Port ISO 11926-1 1-1/16 -12Port ISO 6149-1 M27x2

1.5 ± 0.5
System port “B”

0
9.7 - 0.5

Port ISO 11926-1 1-1/16 -12Port ISO 6149-1 M27x2

12 ± 1°±2

Speed sensor connector

79 ± 245 ± 2

Paint freeCenter of speed
sensor connector
Approximate
center of gravith

67 ± 0.8
System port
“A” & “B”

Case drain port “ L1”
Port ISO 11926 3/4-16
Port ISO 6149-1 M18x1.5

Speed
sensorApproximate
center of gravithA

A

63 ± 1.5

99 ± 288 ± 2(2)

106.1 ± 0.8(Center of speed sensor)

(2)

45°

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

66 ± 1.566 ± 1.5

Name plate
Paint free

71.1 ± 0.8

Paint free(99)
166.6 ± 1.2
P400777

Please contact Danfoss representative for specific installation drawings.

50 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings

Ø 120 ± 1.5+0.3
2x Ø 14.3 -0.1

CCW

CW

B

73 ± 0.373 ± 0.387 ± 1.5

Case drain port “L2”B

87 ± 1.5

106.1 ± 0.8

B-B

Port ISO 11926-1 3/4-16
Port ISO 6149-1 M18x1.5

A-A
2x

Shaft CL
±2

°

75

±

0.

8

75

±

0.

8

45°

45°

±2

°

Shaft CL

P400778

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 51

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
MP1M28/32: Mounting Flange Cartridge Style
2x 73 ± 1.2

R0.75 Max

System port “A”

45

°±

5°

35 ±0.5

Ø134.96 ± 0.025

35 ±0.5

Port ISO 11926-1 1-1/16 -12Port ISO 6149-1 M27x2

System port “B”

1.5 ± 0.5

Port ISO 11926-1 1-1/16 -12Port ISO 6149-1 M27x2

0
14.2- 0.5
12 ± 181 ± 1.2

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

45°

°

±2

31.5 ± 0.8(Center of speed sensor)
Speed sensor connector
45 ± 2Center of speed
sensor connector
Approximate
center of gravith

A

Case drain port “L1”
Port ISO 11926 3/4-16
Port ISO 6149-1 M18x1.5

67 ± 0.8
System port
“A” & “B”

Approximate
center of gravith

Speed
sensorA

63 ± 1.588 ± 2(2)

110 ± 2

Paint free(2)

94 ± 2

Paint free
66 ± 1.566 ± 1.5

Name plate
Paint free(26)
31.5±0.8

92 ± 1.2
P400779

Please contact Danfoss representative for specific installation drawings.

52 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings

Ø148 ± 1.5+0.3
4x Ø14.3 -0.1

CCW

CW

B

77.5 ± 0.3

77.5 ± 0.3

80 ± 0.3

80 ± 0.3

92 ± 1.5

92 ± 1.5

B

Case drain port “L2”31.5 ± 0.8

B-B

Port ISO 11926-1 3/4-16
Port ISO 6149-1 M18x1.5

A-A
20° ± 2°

Shaft CL

75
±
0.8
75 ±
0.8

45°

°

±2

Shaft CL

P400780

Please contact Danfoss representative for specific installation drawings.

© Danfoss | June 2024

BC290322888218en-000207 | 53

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
Gauge Port "A", "B" (20/24 only)

32 ± 0.5(for E-System port style option “SE1” only)A

Mounting flange
surfaceA

Gauge port “MB ”
Port ISO 11926-1 9/16-18(Opposite side: Gauge port “MA”)

132.5 ± 1.2 (SAE A/B flange style)72.2 ± 1.2 (Cartridge style)A-A
2x
Shaft CL52.5 ± 0.8

P400659

54 | © Danfoss | June 2024

BC290322888218en-000207

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
MP1M28/32: Axial System Port Style

151.6 ± 1.2 (SAE-B flange style)
77 ± 1.2 (Cartridge flange style)
System A gauge port “MA1”
Port ISO 11926-1 9/16 -18
Port ISO 6149-1 M14x1.5

40.5 ± 0.8

40.5 ± 0.8

Mounting flange
surface

System B gauge port “MB1”Port ISO 11926-1 9/16 -18
Port ISO 6149-1 M14x1.5

66 ± 1.578 ± 1.566 ± 1.578 ± 1.5

2x 67 ± 0.8 (inch)
2x 65.5 ± 0.8 (metric)

41.5 ± 0.5Port ISO 11926-1 1-1/16 -12Port ISO 6149-1 M27x2

176.1 ± 1.2 (SAE-B flange style)
System port “B”
Port ISO 11926-1 1-1/16 -12Port ISO 6149-1 M27x2

101.5 ± 1.2 (Cartridge flange style)

2x 69.9 ± 1.5 (inch)
2x 70.5 ± 1.5 (metric)

39.5 ± 0.5

Mounting flange
surface

63 ± 1.2

39.5 ± 0.5

System gauge port
“MA1” & “MB1”

System port “A”

177.6 ± 1.2 (SAE-B flange style)
103 ± 1.2 (Cartridge flange style)P400788© Danfoss | June 2024

BC290322888218en-000207 | 55

Technical Information
MP1 Axial Piston Motors Size 20/24, 28/32
Installation Drawings
MP1M28/32: Split Flange System Port Style

151.6 ± 1.2 (SAE-B flange style)
77 ± 1.2 (Cartridge flange style)50.8 ± 0.25

Mounting flange
surface50.8 ± 0.25

40.5 ± 0.5

40.5 ± 0.5

System port “A”
Split flange boss
Port ISO 6162-2 DN19
M10x1.5
18 Full thread depth
Paint free

System port “B”
Split flange boss
Port ISO 6162-2 DN19
M10x1.5
18 Full thread depth
Paint free

23.8 ± 0.25

177.6 ± 1.2 (SAE-B flange style)

Mounting flange
surface

63 ± 1.567 ± 0.8
System port
“A” & “B”

103 ± 1.2 (Cartridge flange style)

66 ± 1.578 ± 1.566 ± 1.578 ± 1.5

P400789

56 | © Danfoss | June 2024

BC290322888218en-000207

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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.

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Local address:

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www.hydro-gear.com
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Phone: +1 515 239 6000

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© Danfoss | June 2024

BC290322888218en-000207