Technical Information

Series 40 Axial Piston Motors

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Technical Information
Series 40 Axial Piston Motors

Revision history

2 | © Danfoss | February 2024

Table of revisions
Date

ChangedRev

February 2024

Corrected version number

0902

November 2022 Removed references to M25

0901

August 2021

Changed document number from 'BC00000079' and '520L0636' to 'BC152886483445' andcorrected model code 'product' section

0805

March 2017

Corrected document number

0704

February 2017

Corrected document formatting

0703

October 2016

Minor updates

0702

January 2014

Danfoss layout

GA

September 2013 add system pressure information

FG

June 2013

add anti-cavitation option

FF

April 2011

correct system pressure gauge port 7/16-20

FE

August 2010

new back page

FD

March 2010

minor edits

FC

November 2007 correction to maximum torque rating 15 and 19 tooth

FB

April 2007

FA

Revised dimensions for straight keyed shaft

September-2006 Corrections in model code examples

F

September-2005 Major Revision

E

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Contents
General description
Basic design........................................................................................................................................................................................ 5
Key features........................................................................................................................................................................................ 5
Cross sections.................................................................................................................................................................................... 6
System circuit diagram...................................................................................................................................................................7
M46 motor schematic .................................................................................................................................................................... 7
Technical Specifications
Overview..............................................................................................................................................................................................8
General................................................................................................................................................................................................. 8
Features and options...................................................................................................................................................................... 8Specifications..................................................................................................................................................................................... 8
Operating parameters.................................................................................................................................................................... 8
Fluid specifications.......................................................................................................................................................................... 9
Hydraulic unit life............................................................................................................................................................................. 9
Performance....................................................................................................................................................................................... 9
Bearing life and external shaft loading ................................................................................................................................. 10
Operating Parameters
Fluids.................................................................................................................................................................................................. 12
Viscosity.............................................................................................................................................................................................12
Temperature.................................................................................................................................................................................... 12
Case pressure...................................................................................................................................................................................12
System Pressure..............................................................................................................................................................................13
Speed ratings...................................................................................................................................................................................13
System design parameters
Sizing equations............................................................................................................................................................................. 14
Filtration............................................................................................................................................................................................ 14
Bypass valve..................................................................................................................................................................................... 14
Loop flushing valve....................................................................................................................................................................... 15
Charge Flow..................................................................................................................................................................................... 15
Charge Pressure/Open Circuit Operation............................................................................................................................. 15
Redundant braking system requirement.............................................................................................................................. 16
Reservoir............................................................................................................................................................................................16
Overpressure protection............................................................................................................................................................. 16
Product coding
Revised model code......................................................................................................................................................................17
Model code modules.................................................................................................................................................................... 17
Fixed motor.................................................................................................................................................................................17
Variable motor........................................................................................................................................................................... 17
Features and options
Anti-Cavitation Valve Option.....................................................................................................................................................19
Displacement limiters...................................................................................................................................................................19
Speed sensor option..................................................................................................................................................................... 20
Pulse pickup and connector.......................................................................................................................................................22
Shaft options....................................................................................................................................................................................22
Through-shaft options................................................................................................................................................................. 23
Shaft options
M35/44 MF........................................................................................................................................................................................24
M35/44 MV....................................................................................................................................................................................... 25
M46 MV..............................................................................................................................................................................................26
Control options
Direct displacement control (DDC)......................................................................................................................................... 28
External Control Handle Requirements............................................................................................................................28
Two-position hydraulic control.................................................................................................................................................29
Installation drawings
M35/M44 MF: mounting flange................................................................................................................................................31© Danfoss | February 2024

BC152886483445en-000902 | 3

Technical Information
Series 40 Axial Piston Motors
Contents
M35/M44 MF: axial ports, twin ports, loop flushing, speed sensor..............................................................................31
M35/M44 MF: radial ports, twin ports, anti-cavitation valve..........................................................................................32
M35/M44 MF: side ports, through shaft.................................................................................................................................33
M35/M44 MV: twin ports.............................................................................................................................................................34
M35/M44 MV: mounting flange, trunnion control............................................................................................................ 35
M46 MV: side ports, loop flushing............................................................................................................................................35
M46 MV: axial ports, loop flushing...........................................................................................................................................37
M46 MV: side ports, thru shaft twin ports, loop flushing.................................................................................................38
M46 MV: mounting flange.......................................................................................................................................................... 39
M46 MV: control ports..................................................................................................................................................................40
Schematics
Motor Schematics.......................................................................................................................................................................... 41

4 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
General description
Basic design
Series 40 is a family of hydrostatic pumps and motors for medium power applications with maximum
loads of 345 bar [5000 psi]. These pumps and motors can be applied together or combined with otherproducts in a system to transfer and control hydraulic power.
Series 40 transmissions (pump plus motor) provide an infinitely variable speed range between zero andmaximum in both forward and reverse modes of operation. The pumps and motors each come in threeframe sizes: M35, M44, and M46.
Series 40 pumps are compact, high power density units. All models use the parallel axial piston / slipper
concept in conjunction with a tiltable swashplate to vary the pump’s displacement. Reversing the angleof the swashplate reverses the flow of fluid from the pump, reversing the direction of rotation of the
motor output.
Series 40 M35, M44, and M46 pumps may include an integral charge pump to provide system
replenishing and cooling fluid flow, as well as servo control fluid flow on M46 pumps. Series 40 pumps
feature a range of auxiliary mounting pads to accept auxiliary hydraulic pumps for use in complementary
hydraulic systems.
Series 40 M46 pumps offer proportional controls with either manual, hydraulic, or electronic actuation.
An electric three-position control is also available. The M35 and M44 pumps include a trunnion style
direct displacement control.
Series 40 motors also use the parallel axial piston / slipper design in conjunction with a fixed or tiltableswashplate. The family includes M35 and M44 fixed motor units and M35, M44, M46 variable motor units.
The M35 and M44 variable motors feature a trunnion style swashplate and direct displacement control.
The M46 variable motors use a cradle swashplate design and a two-position hydraulic servo control.
Key features

•
•
•
•
•
•
•

© Danfoss | February 2024

3 sizes of variable displacement motors
2 sizes of fixed displacement motors
Efficient axial piston design
Complete family of control systems
Proven reliability and performance
Compact, lightweightWorldwide sales and service

BC152886483445en-000902 | 5

Technical Information
Series 40 Axial Piston Motors
General description
Cross sections
M35/M44 variable motor (MV), M35/M44 fixed motor (MF), M46 variable motor (MV) (SAE flange)
Displacement limiter

Bearing

CylinderOutput shaft

Lip seal
PistonSwash plate

PistonCylinder block
PistonOutput shaft

Bearing

Bearing

Output shaft

Lip seal

Lip seal
Cylinder block
Swash plate

Servo piston

P101738E

6 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
General description
System circuit diagram

Heat exchanger
bypassControlhandleReservoir
Filter

Displacement
controlvalve

Heat
exchanger
Fixed displacement
motor

Cylinderblockassembly

Cylinderblockassembly

Charge relief
valve
Bypassvalve

Outputshaft

Charge
pump
Input
shaft

Variable
displacement
pump

Loop flushing
moduleSuction flow

Check valves
w/ high pressure
relief valve

Charge pressure
Servo pressure
High pressure
Case flow
P100586E

A Series 40 M35 fixed motor is shown in a hydraulic circuit with a Series 40 M46 variable pump. A loop
flushing module is included on the motor. The circuit features suction filtration and heat exchanger.
M46 motor schematic
M1

X2 X1

A

L2
B
M2

L2
P101869

The system ports (A and B) connect to the high pressure work lines. The motor receives pressurized fluidin its inlet port and discharges de-energized fluid through the outlet port. Either port can act as inlet oroutlet; flow is bidirectional. System port pressure is gauged through ports M1 and M2. The motor has twocase drains (L1 and L2). The motor may include loop flushing. Loop flushing provides additional coolingand filtration capacity.

© Danfoss | February 2024

BC152886483445en-000902 | 7

Technical Information
Series 40 Axial Piston Motors
Technical Specifications
Overview
Specifications and operating parameters are shown below. Not all hardware options are available for all
configurations. For additional information, see Operating Parameters on page 12, System design
parameters on page 14, Product coding on page 17, Features and options on page 19 and Control
options on page 28.
GeneralProduct Line

Series 40 motors

Product TypeIn-line, axial piston, fixed and variable, positive
displacement motors

Direction of Rotation

Clockwise (CW) and counterclockwise (CCW)

Installation Position

Discretionary, the housing must be filled with hydraulicfluid before operation

Filtration Configuration

Suction or charge pressure filtration

Other System Requirements

Independent braking system, circuit overpressure
protection, suitable reservoir and heat exchanger

Features and options
Model

M35 MFM44 MF

M35 MVM44 MVM46 MV

Type of mounting

SAE B

SAE B

SAE B

SAE B

SAE B

Port connections

Side, Twin, Axial

Side, Twin, Axial

Twin

Twin

Side, Twin, Axial

Output shaft options

Splined, Tapered,
Straight Key

Splined, Tapered,
Straight Key

SplinedSplinedSplined, Tapered

Control options

-

-

DDC

DDC

Hyd. 2-pos.

Loop flushing

OptionOptionOptionOptionOption-OptionOptionOptionOption--Option

Displacement limiters Speed sensors

OptionSpecifications
Model

Unit

M35 MFM44 MF

M35MV

M44MV

M46 MV

Model configuration

-

Fixed

Fixed

Variable

Variable

VariableType of mounting

-

SAE B

SAE B

SAE B

SAE B

SAE B

Displacement

cm3/rev [in3/rev]

35 [2.14]

44 [2.65]

35 [2.14]

44 [2.65]

46 [2.80]

Weightkg [lbf]

11 [26]

11 [26]21 [47]21 [47]23 [51]Mass moment of inertiakg•m2 [slug•ft2]

0.0033 [0.0024] 0.0032 [0.0023] 0.0033 [0.0024]

0.0032 [0.0023]

0.0050 [0.0037]

M35 MF

Operating parametersModel

M44 MF

M35 MVM44 MVM46 MV

Case pressure bar [psi]Maximum working

1.7 [25]

Maximum

5.2 [75]

Speed limits min-1[rpm]Rated @ max disp.

3600

3300

3600

3300

4000

Maximum @ max. disp.

4500

4100

4500

4100

4100

8 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Technical Specifications
Model

M35 MFM44 MF

M35 MVM44 MVM46 MV

Rated @ min. disp.

-

-

4200

3900

4500

Maximum @ min. disp.

-

-

5300

4850

5000

Maximum working

380 [5511]

345 [5000]

380 [5511]

345 [5000]

345 [5000]

Maximum

415 [6019]

415 [6019]

415 [6019]

415 [6019]

385 [5584]

System pressure bar [psi]Fluid specifications
Ratings and data are based on operation with premium petroleum-based hydraulic fluids reftaining
oxidation, rust, and foam inhibitors.
Parameter

Unit

Minimum

reftinuous

Maximum

Viscosity

mm /sec (cSt)[SUS]

7 [47]

12-60 [70-278]

1600 [7500]

Temperature°C [°F]-40 [-40]

82 [180]

104 [220]

Cleanliness
Filtration
efficiency

ISO 4406 Class 18/13 or better
suction filtration

β35-44=75 (β10≥1.5)

charge filtration

β15-20=75 (β10≥10)

Hydraulic unit life
Hydraulic unit life is the life expectancy of the hydraulic components. Hydraulic unit life is a function of
speed and system pressure; however, system pressure is the dominant operating variable affecting
hydraulic unit life. High pressure, which results from high load, reduces expected life.
It is desirable to have a projected machine duty cycle with percentages of time at various loads andspeeds. Danfoss calculates appropriate design pressure from this information. This method of selecting
operating pressure is recommended whenever duty cycle information is available.
All pressure limits are differential pressures and assume normal charge pressure. Series 40 motors willmeet satisfactory life expectancy if applied within the parameters specified in this bulletin. For moredetailed information on hydraulic unit life see BLN9884 Pressure and Speed Limits.
PerformanceThis performance graph provides typical volumetric and overall efficiencies for Series 40 motors. These
efficiencies apply for all Series 40 motors at maximum displacement.
Motor performance as a function of operating speed
100
Volumetric Efficiency - 170 bar [2500 psi]

Efficiency - %95Volumetric Efficiency - 345 bar [5000 psi]
90

Overall Efficiency - 170 bar [2500 psi]

Overall Efficiency - 345 bar [5000 psi]

85

80
0

© Danfoss | February 2024

25

50

Speed - % of Rated Speed

75

100

P100 455E

BC152886483445en-000902 | 9

Technical Information
Series 40 Axial Piston Motors
Technical Specifications
The performance map provides typical motor overall efficiencies at various operating parameters. These
efficiencies apply for all Series 40 motors at maximum displacement.

System Pressure

270

4000

210

3000

140

2000

70

1000

0

0

%

psi
5000

89%

88

bar
345

80%
85%

Motor performance as a function of operating speed

89%
88%
85%
80%

0

25

50

75

Speed - % of Rated Speed

100
P100 456E

Bearing life and external shaft loading
Bearing life is a function of speed, pressure and swashplate angle, plus any external loads. Other life
factors include oil type and viscosity.
In vehicle propulsion drives with no external loads, where the speed, pressure, and swashplate angle areoften changing, normal bearing ß10 (90% survival) life will exceed the hydraulic unit life.
In non-propel drives, such as conveyors or fan drives, the operating speed and pressure may be nearly
constant leading to a distinctive duty cycle compared to that of a propulsion drive. In propel applications,
Danfoss recommends a bearing life review.
Series 40 motors are designed with bearings that can accept some incidental external radial and thrustloads. However, any amount of external load will reduce the expected bearing life.
The allowable radial shaft loads are a function of the load position, the load orientation, and theoperating pressures of the hydraulic unit. 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).
The recommended maximum radial load (Re) is based on an external moment (Me) and the distance (L)from the mounting flange to the load, (see table at below). The loads in the table reflect a worst caseexternal load orientation (0 degrees), a continuously applied working pressure of 140 bar (2000 psi), 20
bar (285 psi) charge pressure, 1800 min-1(rpm), and a bearing life (ß10) of 2000 hours. Avoid thrust loads
in either direction.
The recommended maximum allowable radial load is calculated as: Re = Me / L
If continuously applied external radial loads exceed the recommended maximum allowable, or thrustloads are known to occur, contact Danfoss for an evaluation of unit bearing life. Optional high capacity
bearings are available.
Tapered output shafts or clamp-type couplings are recommended for applications where radial shaft sideloads are present.
Shaft loading parameters

10 | © Danfoss | February 2024

Re

Maximum radial side load

Me

Maximum external moment

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Technical Specifications
Shaft loading parameters (continued)
L

Distance from mounting flange to point of load

FB

Force of block (applies at center of gravity)

T

Thrust load

Recommended maximum external shaft moments

Me N•m [lbf•in]

M35/44M46

25 [225]

24 [215]External shaft loads

L
FB
Re
T

P100 453E

Direction of external shaft load

0 Re
End viewof shaf t
90 Re

Axis of swashplate
rotatio n© Danfoss | February 2024

270 Re180 ReP100 454E

BC152886483445en-000902 | 11

Technical Information
Series 40 Axial Piston Motors
Operating Parameters
FluidsRatings and performance data are based on operating with premium hydraulic fluids containing
oxidation, rust, and foam inhibitors. These include premium turbine oils, API CD engine oils per SAE J183,
M2C33F or G automatic transmission fluids (ATF), Dexron™ II (ATF) meeting Allison™ C-3 or Caterpillar™
T0‑2 requirements, and certain specialty agricultural tractor fluids. For more information on hydraulicfluid selection, see Danfoss publications: BC152886484524, Hydraulic Fluids and Lubricants, Technical
Information, and 520L465, Experience with Biodegradable Hydraulic Fluids, Technical Information.
Viscosity
Fluid viscosity limits
Condition

mm2/s (cSt)SUSMinimum

7

47

Continuous

12-60

70-278Maximum

1600

7500

Maintain fluid viscosity within the continuous range for maximum efficiency and bearing life. Minimum
viscosity should only occur during brief occasions of maximum ambient temperature and severe duty
cycle operation. Maximum viscosity should only occur at cold start: Limit speeds until the system warms
up. See Danfoss publication: BC152886484524, Hydraulic Fluids and Lubricants, Technical Information.
Temperature
Maintain fluid temperature within the limits shown in the table. Minimum temperature relates to thephysical properties of the component materials. Cold oil will not affect the durability of the motor
components. However, it may affect the ability of the motor to transmit
power. Maximum temperature is based on material properties. Don't exceed it. Measure maximum
temperature at the hottest point in the system. This is usually the case drain.
Ensure fluid temperature and viscosity limits are concurrently satisfied.
Temperature limits
Temperature limits
Minimum(intermittent, cold start)- 40° C [- 40° F]

Continuous

82.2° C [180° F]

Maximum

104.4° C [220° F]

Case pressure
Maintain case pressure within the limits shown in the table. Ensure housing is kept filled with hydraulicfluid.
Case pressure limits
Maximum (continuous)

1.7 bar [25 psi]

Intermittent (cold start)

5.2 bar [75 psi]

W Warning
Operating outside of case pressure limits will damage the motor. To minimize this risk, use full size inlet
and case drain plumbing, and limit line lengths.
12 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Operating Parameters
System Pressure
System pressure is the differential pressure between high pressure system ports. It is the dominantoperating 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 or pressure limiter setting normally defined within theorder code of the pump. This is the applied system pressure at which the driveline generates the
maximum calculated pull or 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.
Minimum low loop pressure must be maintained under all operating conditions to avoid cavitation.
All pressure limits are differential pressures referenced to low loop (charge) pressure. Subtract low looppressure from gauge readings to compute the differential.

Speed ratings
The table, Operating parameters on page 8, gives rated and maximum speeds for each displacement. Not
all displacements operate under the same speed limits. Definitions of these speed limits appear below.
Rated speed is the maximum recommended operating speed at full power condition. Operating at or
below this speed should yield satisfactory product life. In vehicle propel applications, maximum motor
speed during unloaded, on-road travel over level ground should not exceed this limit.
Maximum speed is the highest operating speed permitted. Exceeding maximum speed reduces motor
life and can cause loss of hydrostatic power and braking capacity. Never exceed the maximum speed
limit under any operating 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.
Speed limits
Limit min-1(rpm)© Danfoss | February 2024

M35 MFM44 MF

M35 MVM44 MVM46 MV

Rated at max. displ.

3600

3300

3600

3300

4000

Maximum at max. displ.

4500

4100

4500

4100

4100

Rated at min. displ.

-

-

4200

3900

4500

Maximum at min. displ...

-

-

5300

4850

5000

BC152886483445en-000902 | 13

Technical Information
Series 40 Axial Piston Motors
System design parameters
Sizing equations
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. For more information on hydrostatic drive selection, refer to Danfoss applications guideline
BC157786484430, Selection of Drive Line Components.
Based on SI units

Based on US units
Vg • n1000 • η v(l/min)Input f low Q

Output torque M =Vg • ′p • η m
20 • π(N•m)

Output torque M =Vg • ′p • η m
2•π(lbf•in)

Output power P =Q • ′p • η t
600

(kW)

Output power P =Q • ′p • η t
1714

(hp)

Input flow Q=

Motor speed n = Q • 1000 • η v (min-1(rpm))
Vg

Variables

Vg • n=Motor speed n =(US gal/min)

231 • η v

Q • 231• η v
Vg(min-1(rpm))

SI units [US units]
Vg =
pO =
pi =
′p =
n =
ηv =
ηm =
ηt =

Displacement per revolution
Outlet pressure
Inlet pressurepO – pi (system pressure)
Speed
Volumetric eff ciency
Mechanical eff ciency
Overall eff ciency (η v • η m)

cm3/rev [in3/rev]
bar [psi]bar [psi]bar [psi]
min-1 (rpm)Filtration
To prevent damage to the system, including premature wear, fluid entering the motor must be free ofcontaminants. Series 40 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

The filter may be located either on the inlet (suction filtration) or discharge (charge pressure filtration)side of the charge pump. Series 40 pumps are available with provisions for either suction or chargepressure filtration to filter the fluid entering the charge circuit (see Loop flushing valve on page 15).
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 BC152886482150, Design Guidelines for Hydraulic Fluid Cleanliness.
Bypass valve
In some applications it is desirable to bypass fluid around the variable displacement pump, for example;
to allow a vehicle to move short distances at low speeds without running the prime mover. This is doneby opening a manually operated bypass valve. This valve connects both sides of the pump/motor circuit
and allows the motor to turn. During normal operation, this valve must be fully closed .
Bypass valves are available in Series 40 pumps. See Danfoss publication: BC152886483301, Series 40
Pumps Technical Information.
Bypass valves are intended for moving a machine or vehicle for very short distances at very slow speeds.
They are NOT intended as tow valves.
14 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
System design parameters
Loop flushing valve
Series 40 motors may incorporate an integral loop flushing valve. Installations that require additional
fluid to be removed from the main hydraulic circuit because of fluid cooling or cleanliness requirements,
will benefit from loop flushing. A loop flushing valve will remove heat and contaminants from the main
loop at a rate faster than otherwise possible. Contact your Danfoss representative for production
availability on specific frame size motors.
Series 40 loop flushing valves include a loop flushing relief valve with integral orifice. The flushing flow isa function of the pump charge relief valve, and the orifice size.
Loop flushing flows of 3 to 7 l/min [0.75 to 2 US gal/min] are adequate for most applications. Contact
your Danfoss representative for assistance.

W Warning
Incorrect charge pressure settings may result in the inability to build required system pressure and/or
inadequate loop flushing flows. Maintain correct charge pressure under all conditions.

Flow l/min [US gal/min]

Typical loop flushing flow as a function of charge pressure
15.14[4.00]
11.36[3.00]
7.57[2.00]
3.79[1.00]
0

8.62
[125]

12.07
[175]

15.51
[225]

19.96
[275]

22.41
[325]

Charge pressure bar [psi]

25.86
[375]
P100 643E

Loop flushing valve

Loop flushingrelief valve
with orifice

Loop flushing
shuttle v alve
P100 448E

Charge Flow
Closed circuit operations require a charge pump to make up for lubrication and cooling losses, and to
charge the low pressure side of the system loop. The total charge flow required is a sum of the charge
flow requirements for the pump, plus the flow requirements for all motors in the system, plus any
external loop flushing requirements. Ensure that adequate charge flow exists under all conditions ofengine speed and motor speed and pressure.
Charge Pressure/Open Circuit Operation
M35 and M44 motors can be operated at the published speed limits with zero pressure in the low side of
the system loop. The case pressure must not be higher than 2 bar over the low side of the loop systempressure. With zero back pressure, the maximum allowed case pressure is 2 bar [29 psi]. Case drain lines© Danfoss | February 2024

BC152886483445en-000902 | 15

Technical Information
Series 40 Axial Piston Motors
System design parametersmust 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.

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 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.
Use a 100 - 125 µm screen covering the outlet port. Place the reservoir inlet (return lines) below thelowest expected fluid level, as far away from the outlet as possible. Use a baffle (or baffles) between thereservoir inlet and outlet ports to reduce aeration and fluid surging.
Overpressure protection
Series 40 motors (as well as other system components) have pressure limits. Relief valves or pressure
limiters should be present in the high pressure circuit to protect components from excessive pressures.

C Caution
High pressure relief valves are intended for transient overpressure protection and are not intended forcontinuous pressure control. Operation over relief valves for extended periods of time may result insevere heat build up. High flows over relief valves may result in pressure levels exceeding the nominal
valve setting and potential damage to system components.

16 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Product coding
Revised model code
The model code is a modular description of a specific product and its options. To create an order code toinclude the specific options desired, see the Series 40 Motor Model Code Supplement AX152886481522.

Name plate

Model
code

Model
number

M46-2001

Model-No/Ident-No.
Model Code

MMV 046 C B A B A A
R NN A A BLL DR A
FF A CNN

Serial-No

A - 96 - 26 - 12345

SerialnumberMade in USA
Place of manufacture
P101372

Model code modules
Fixed motor
Displacement
M M F

C

D E

F

Z

T

G

-

-

C -

S 4 6

-

-

*

-

*

*

*

Type

Product

C Seal group
D Output shaft/through shaft configuration
E Endcap configuration
F Cylinder block group
G Housing configuration
T Special hardware features
Z Special features (non-hardware) *** = None
Variable motor
Displacement
M M V

S 4 6

Product

C
C -

D E
-

F
-

Z

T

G
-

*

*

Type

C Seal group
D Output shaft/through shaft configuration
E Endcap configuration
F Control features© Danfoss | February 2024

BC152886483445en-000902 | 17

Technical Information
Series 40 Axial Piston Motors
Product coding
G Housing configuration
T Special hardware features
Z Special features (non-hardware) *** = None18 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Features and options
Anti-Cavitation Valve Option
The M35 and M44 fixed motors are available with an anti-cavitation valve option. The key application forthis option is open circuit fan drives.
The anti cavitation valve combines the function of a shock valve and check valve within the same cavity
which is integrated into the endcap. The check valve function provides protection against cavitation thatcan 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 short-circuiting 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 or 345 bar 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

Port APort B

Special Hardware Feature

Clockwise (CW)

In

Out

NCD/NCFCounterclockwise (CCW)

Out

In

NCE/NCG

Anti-Cavitation Valve, Port A High Pressure
Rotation Clockwise

M1

A

Anti-Cavitation Valve, Port B High Pressure
Rotation Counterclockwise

L2

M1

A

Optional

B

L2

Optional

B
M2

L1

M2

L1
P108697

Displacement limiters
M35, M44, and M46 variable motors have minimum displacement limiters. Minimum unit displacement
is obtained with the adjuster screw at its maximum extension from the end cap or displacement control
piston cover. All motors are shipped with the displacement limiter set for minimum motor displacement.
The M35 and M44 MV minimum displacement limiter is located in the end cap. The M46 MV minimum
displacement limiter is located in the displacement control piston cavity. The length and configuration ofthis limiter will depend upon the control option installed in the motor.
M46 MV units may have an optional mechanical maximum displacement limiter located in thedisplacement control piston cover. The maximum displacement limit can be adjusted by loosening thesealing lock nut, adjusting displacement by rotating the screw with a screwdriver, then locking theadjuster by torquing the sealing lock nut.
Maximum unit displacement is obtained with the adjuster screw standing at its maximum height out ofthe displacement control piston cover. All motors are shipped with the limiter set for maximum motor
displacement.
© Danfoss | February 2024

BC152886483445en-000902 | 19

Technical Information
Series 40 Axial Piston Motors
Features and options

W Warning
Undesirable output speed hazard.
Take care adjusting displacement limiters. Too low of a minimum displacement setting can result inhigher than expected output speed. Retorque the sealing locknut after every adjustment to prevent an
unexpected changes and to prevent external leakage.
Displacement limiter M35/M44 MV
Sealing locknut
Displacement limiter
Swashplate

P100 449E

Displacement limiter M46 MV
Fixed minimum
displacement limiter

Adjustable maximum
displacement limiter

Adjustable minimum
displacement limiter

P100 450E

Speed sensor option
Series 40 motors are available with a speed sensor option for direct measurement of motor output speed.
You can use this sensor may to sense the direction and speed of motor rotation.
A special magnetic speed ring is pressed onto the outside diameter of the cylinder block. A hall effectpulse pickup is located in the motor housing. The sensor accepts supply voltage and outputs a digitalpulse signal in response to the speed of the ring. The output changes its high/low state as the north andsouth poles of the permanently magnetized speed ring pass by the face of the sensor. The digital signal isgenerated at frequencies suitable for microprocessor based controls.
This sensor will operate with a supply voltage of 4.5 to 15 Vdc, and requires a current of 12 mA at 5.0 Vdc(minimum) under no load. Maximum operating current is 20 mA at 5 Vdc (maximum). Maximum
operating frequency is 15 kHz. Output voltage in High State (VOH) is sensor supply voltage minus 0.5 Vdc,
minimum. Output voltage in Low State (VOL) is 0.5 Vdc, maximum. The sensor is available with a Packard
Weather-Pack™ or 4-pin sealed connector.
Contact your Danfoss representative for production availability on specific motor frame sizes, or for
special speed sensor options.

20 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Features and options
Speed sensor specifications
Supply voltage

4.5 - 15 Vdc

Required current

12 mA @ 5 Vdc(no load)

Maximum current

20 mA @ 5Vdc

Maximum frequency

15 kHz

VOH

Supply Vdc - 0.5 Vdc

VOL

0.5 Vdc maximum

Magnetic ring
Pulses/revolution

M35 M44 M46
46 46 51

Connector

Packard Weather-PackTM
3- pin, 4-pin

Speed sensor cross section

Speed sensor
Magnetic ring
Cylinder block

P100 452E© Danfoss | February 2024

BC152886483445en-000902 | 21

Technical Information
Series 40 Axial Piston Motors
Features and options
Pulse pickup and connector

Speed sensor with directional signal
Packard Weather-PackTM
4 pin tower connector
Red
White
Black
Green

Supply voltage +

A
B
C
D

Speed signal
Ground common
Direction

Mating parts kit part number K03379 (4 pin)

Speed sensor without directional signal
3 pin Weather-PackTM
shroudRed

A

Supply voltage +

White

B

Speed signal

Black

C

Ground common

Mating parts kit part number K20582 (3 pin)

Shaft options
Series 40 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. Other shaft
options may exist. Contact your Danfoss representative for availability.
Shaft torque for tapered shafts
The rated torque is based on the contact pressure between the shaft and hub surfaces with poor surface
contact areas. With an increased quality of the contact areas, the contact pressure between the shaft andhub is increased and allows higher torque to be transmitted.
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. However, a spline running in an oil-flooded environment provides superior oxygen restrictionin addition to contaminant 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 in to an auxiliary pad of a pump.
Shaft availability and torque ratingsN•m [lbf•in]

M35 MFM44 MF

M35 MVM44 MVM46 MV

Spline13-tooth,
16/32 pitch

Continuous

73 [650]73 [650]73 [650]73 [650]73 [650]Max

226 [2000]

226 [2000]

226 [2000]

226 [2000]

226 [2000]

Spline15-tooth,
16/32 pitch

Continuous

153 [1350]

153 [1350]

153 [1350]

153 [1350]

153 [1350]Max

362 [3200]

362 [3200]

362 [3200]

362 [3200]

362 [3200]

22 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Features and options
Shaft availability and torque ratings (continued)N•m [lbf•in]

M35 MFM44 MF

M35 MVM44 MVM46 MV

Spline19-tooth
16/32 pitch

Continuous

-

-

-

-

194 [1710]

Max

-

-

-

-

460 [4070]

Tapered 1.00 inch

Max497 [4400]

497 [4400]--

497 [4400]

Straight keyed 0.875 inchMax

226 [2000]

226 [2000]

-

-

-

Recommended mating splines for Series 40 splined output shafts should be in accordance with ANSI
B92.1 Class 5. Danfoss external splines are modified Class 5 Fillet Root Side Fit. The external spline Major
Diameter and Circular Tooth Thickness dimensions are reduced in order to assure a clearance fit with themating spline.

Through-shaft options
Optional through-shafts are available on Series 40 fixed and variable displacement motors (as noted in
the accompanying table). Through-shafts are provided for use in secondary (parking) braking systems.
Through-shaft ends are not intended for continuous power transmission.
Through-shaft availability and torque limitations
Frame size

Shaft spline

Max. torque limitN•m [lbf•in]

M35 MF

13T 16/32 P

328 [2900]

M44 MF

13T 16/32 P

328 [2900]

M46 MV(SAE)

13T 16/32 P

328 [2900]

W Warning
Potential loss of braking capacity.
Exceeding these torque limits could cause shaft breakage. Ensure your application never exceeds
maximum torque limits under any operating conditions.

© Danfoss | February 2024

BC152886483445en-000902 | 23

Technical Information
Series 40 Axial Piston Motors
Shaft options
M35/44 MF
Code

A, C
F

Description

Splined output shaft(see table)

Torque rating

Drawing

Maximum torquerating N•m [lbf•in]Continuous torquerating N•m [lbf•in]

13 tooth 226 [2000]

13 tooth 73 [650]

15 tooth 362 [3200]

15 tooth 153 [1350]

Coupling must not
protrude beyond
this sur face

7.65 [0.301]
Mountingflange(ref.)SU

V dia.

W pitch dia.
30° pressure angl e
Y teeth, Z pitch
fillet root side fit
per ANSI B92.1-1970 class no.5
also mates with fla t
root side fit

T dia.

P104 430E

M35 / M44 MF splined shaft option
Shaft option

Shaft lengthS

Shaft
diameterT

Full splineU

Major dia.
V

Pitch dia.
WA

33.55 [1.321]

18.8 [0.74]

16.5 [0.65]

21.72 [0.8550]

C

33.55 [1.321]

18.8 [0.74]

16.5 [0.65]

F

33.55 [1.321]

21.98 [0.865]

18.5 [0.73]

24 | © Danfoss | February 2024

No. teeth
Y

Pitch
Z

Thru shaft

20.638 [0.8125] 13

16/32

-

21.72 [0.8550]

20.638 [0.8125] 13

16/32

13T

24.89 [0.9800]

23.812 [0.9375] 15

16/32

-

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Shaft options
Code

N

Description

Ø 25.4 mm [1.000 in]
1:8 taper

Torque rating

Drawing

Maximum torquerating N•m [lbf•in]Continuous torquerating N•m [lbf•in]

497 [4400]—

42.8 [1.68]
33.3 gauge di m.
[1.311]
Mountingflange(ref.)

Coupling must not
protrude beyond
25.4 max. [1.000]

27 [1.06]

6.30 x 22.22 dia. Woodruff ke y
[0.248 x 0.875]
0.25 [0.01] min. R on edges

3.81 max. [0.150]
22.22 gauge di a.
[0.875]0.750-16 UNF-2A thd.
38.1 [1.500] taper per footper SAE J501
25.4 [1.000] nominal shaft dia.

P104 431E

SØ 22.2 mm [0.874 in]straight keyed

226 [2000]

Coupling must not
protrude beyond
this sur face—
Mountingflange(ref.)

7.65 [0.301]

6.35 [0.250] sq. key
38.1 [1.500] long
0.38 [0.015] min. R
on edges
2.84 max.
[0.112]64.74 ±0.025[2.549] ±0.64

9.4 [0.37]

22.2 dia. ± 0.03
[0.874 ± 0.001]

P104 432E

M35/44 MV
CodeDescription

Torque rating

Drawing

Maximum torque Continuous
rating N•mtorque rating[lbf•in]N•m [lbf•in]A

Splined output shaft(see table)

226 [2000]

Coupling must not
protrude beyond
this sur face73 [650]
7.87[0.310]SU

V dia.

Mountingflange(ref.)© Danfoss | February 2024

W pitch dia.
30° pressure angl e
Y teeth, 16/32 pitch
fillet root side fit
per ANSI B92.1 class no.5
also mates with flatroot side fit

T dia.

P104 433E

BC152886483445en-000902 | 25

Technical Information
Series 40 Axial Piston Motors
Shaft options
M35 / M44 MV splined shaft option
Shaft option

Max. coupling Shaft
engagement diameter
S
T

Full spline
lengthU

Major dia.
V

Pitch dia.
WA

33.3 [1.31]

16.5 [0.65]

21.72 [0.855]

20.638 [0.8125] 13

18.8 [0.74]

No. teethY

Pitch

Thru shaft

16/32

-

M46 MV
Code

Description

Torque rating
Maximum torquerating N•m [lbf•in]

A, B,
E, F,

Splined output shaft(see table)

D

Drawing
Continuous torquerating N•m [lbf•in]

13 tooth 226 [2000]

13 tooth 73 [650]

15 tooth 362 [3200]

15 tooth 153 [1350]

19 tooth 460 [4070]

19 tooth 194 [1710]

Coupling must not protrude
beyond this sur face
S max.
U Full Spline
T max. dia.

V dia.

R
Mountingflange(ref.)

J

25.4 [1.000] tapered
shaft

—

W pitch dia.
30° pressure angl e
Y teeth, Z pitch
fillet root side fit
per ANSI B92.1 class no.5
also mates with flatroot side fit

7.47 [0.294]

P104 434E

Coupling must not protrude
beyond this sur face

497 [4400]
36.58 [1.440]max.

6.30 x 22.22 dia. woodruff key[0.248 x 0.875]
1/8 taper [1.500 per foot]per SAE standard J501
25.4 [1.000] nominal shaft dia.
3/4 - 16 Thd.
22.22 [0.875]
gauge dia.
26.97
[1.062]
9.17 gauge di m.
[0.361]

Mountingflange(ref.)

37.62[1.481]5.05 [0.199]

P104 435E

M46 MV splined shaft option
Shaft option Shaft
extension
R

Max.
Shaft
coupling
diameterengagement T
S

Fullspline
lengthU

Major dia.
V

Pitch dia.
W

No. teeth
Y

Pitch
Z

Thru shaftA

32.94 [1.297]

32 [1.26]

19.1 [0.75]

15.8 [0.62]

21.72 [0.855]

20.638[0.8125]

13

16/32

---

B

32.94 [1.297]

32 [1.26]

19.1 [0.75]

15.8 [0.62]

21.72 [0.855]

20.628[0.8125]

13

16/32

13T

E

37.72 [1.485]

36.6 [1.44]

22.3 [0.88]

22.86 [0.90]

24.89 [0.980]

23.812[0.9375]

15

16/32

---

26 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Shaft options
M46 MV splined shaft option (continued)
Shaft option Shaft
extension
R

Max.
Shaft
coupling
diameterengagement T
S

Fullspline
lengthU

Major dia.
V

Pitch dia.
W

No. teeth
Y

Pitch
Z

Thru shaft

F

37.72 [1.485]

36.6[1.44]

22.3 [0.88]

22.86 [0.90]

24.89 [0.980]

23.812[0.9375]

15

16/32

13T

D

37.72 [1.485]

36 [1.44]

28.4 [1.114]

22.35 [0.88]

31.24 [1.230]

30.162[1.1875]

19

16/32

---

Contact Danfoss Application Engineering for specific installation drawings.

© Danfoss | February 2024

BC152886483445en-000902 | 27

Technical Information
Series 40 Axial Piston Motors
Control options
Direct displacement control (DDC)

W Warning
Unintended vehicle movement hazard.
Internal forces may not return the swashplate to the neutral position under all operating conditions.
The direct displacement control is available on either side of the M35 and M44 variable motors. It
provides a simple, positive method of displacement control. Movement of the control shaft causes a
proportional swashplate movement, thus varying the motor's displacement from full to minimum
displacement.
Neutral position is not factory set, nor is there any internal neutral return mechanism. The applicationmust include provisions for all control linkage and neutral return functionality.
External Control Handle Requirements
Maximum allowable trunnion torque is 79.1 N•m [700 lbf•in]. Minimum torque necessary to hold theswashplate per 70 bar of differential system pressure is 11.3 N•m [100 lbf•in]. Maximum trunnion angle is
16° for M35 and M44.
DDC on left side of M35 motor
16° for M35
16° for M44

Minimumswashplate angle

P100 457E

Motor displacement vs swashplate rotation

di Mo
t
sp
la o r
ce
m
en
t

100%

Min.

Trunnion rotation

P100 458E

28 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Control options
DDC input specifications
Max. torque N•m [lbf•in]

79.1 [700]Min. torque to hold (per 70 bar[1000 psi] system pressure)N•m [lbf•in]

11.3 [100]Max. angle

16°

Two-position hydraulic control
Series 40 M46 variable displacement motors are equipped with a hydraulically controlled swashplate. The
motor is spring biased toward maximum displacement. A hydraulic piston is used to shift the swashplatefrom maximum to minimum displacement. A single or two-line control can regulate the servo piston.
With the standard single-line control option, hydraulic pressure is supplied to the control port (X1) to
shift the motor to minimum displacement. The opposite end of the displacement control piston
internally drains to the motor case. The swashplate shifts with a minimum pressure of 13.8 bar [200 psi].
The bias spring returns the motor to maximum displacement when control pressure is removed.
The single-line control generally uses a customer supplied 2-position, 3-way control valve. Hydraulicpressure on the control piston must not exceed 27.6 bar [400 psi].
In applications which encounter frequent shifting on-the-go as part of the normal duty cycle, we
recommend the optional two-line control. Applications with routine shifting from work range to travel
range may not require the two-line control. to command minimum displacement, port control pressure
to port X1 and drain port X2. To command maximum displacement, port control pressure to port X2 anddrain port X1.
The two-line control generally uses a customer supplied 2-position, 4-way control valve. Hydraulicpressure on the control piston must not exceed 27.6 bar (400 psi).
Orifices in either (or both) the control valve supply and drain lines optimize the shift rate for either the
single or two-line control. Contact your Danfoss representative for additional information.
Input specifications bar [psi]© Danfoss | February 2024

Single line control

Two line control

Max. pressure on control

27.6 [400]27.6 [400]Min. pressure to shift

13.8 [200]13.8 [200]Control valve(customer supplied)

2-position / 3 way

2-position / 4-way

BC152886483445en-000902 | 29

Technical Information
Series 40 Axial Piston Motors
Control options
M46 2-position hydraulic controls

Top
Port X2
Control pressure supply(for maximum displacement)

Port X1
Control pressure supply(for minimum displacement)
Single-line control

Two-line control

Bottom30 | © Danfoss | February 2024

P100459E

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Installation drawings
M35/M44 MF: mounting flange
66.55 [2.620]
Case drain - L1 and L2
both sides
Approx. center ofgravity

4.06[0.16]CW

CCW

14.27 dia.
[0.562] (2) places

70.36[2.77](2) places

87.25[3.435](2) places
P100569E*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.
M35/M44 MF: axial ports, twin ports, loop flushing, speed sensor
Flow direction© Danfoss | February 2024

Motor shaft rotation

Port APort B

ClockwiseIn

Out

Counterclockwise

Out

In

BC152886483445en-000902 | 31

Technical Information
Series 40 Axial Piston Motors
Installation drawings
M35-M44 MF dimensions

184.9[7.28]

92.1[3.62]

186.8[7.34]

30.5[1.200]84.8[3.34]

1-1/16 -12
O-ring boss
Per SAE J514
(2) places
44.4[1.75]

71.9[2.83]

7/8 -14
O-ring boss
Per SAE J514
Alternate case drain - L2

40.1
[1.58](2) places

Axial Ported Endcap

7/8 -14
O-ring boss
Per SAE J514
Case drain - L3

186.3
[7.34]

77.7[3.06](2) Places
Port B

154.6[6.08]

1-1/16 -12(2) places

Port A

92.1[3.63]
12.8[0.51]

79.5
77.1 [3.13][3.04]

78.2[3.08]

71.9[2.83]
23.9[0.94](2) Places

7/16 -20*
System pressuregauge port - M2

Loop flushingvalve (option)

7/16 -20*
System pressuregauge port - M1

Loop flushing
shuttle valve (option)

99.1[3.90]

Twin Ports*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.
M35/M44 MF: radial ports, twin ports, anti-cavitation valve
77.7 (2x)[3.06]

187.1[7.37]

28.6[1.13] (2x)Port APort B

155.3[6.11] Ports A and B
6.63 ± 0.635[0.261 ± 0.025]
78.1[3.07]

Coupling must not
protrude beyond
this surface
39.35± 0.635
6.35+ 0.007.89 - 0.05

Sq. Key.
25.4 [1.00] long
+ 0.000 R. 0.5 [0.02][0.312] - 0.002 on edges

3.4 [0.133] Max.
Ø 28.55 ± 0.03
[1.124 ± 0.001]

Anti-Cavitation
Valve Port B
7/16-20 Str. Thd.
O-ring boss
Per SAE J514
System Pressure
Gauge Port - M2

76.3
[3.00]

72.2[2.84]

23.9[0.94](2x)

7/16-20 Str. Thd.
O-ring boss
Per SAE J514
System Pressure
Gauge Port - M1

Anti-Cavitation
Valve Port A

155.3[6.11]P108708E

32 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Installation drawings*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.
M35/M44 MF: side ports, through shaft
77.7[3.06](2) places
67.3[2.65](2) places

186.3[7.34] 154.6[6.09]

Approx centerof gravity

7/8 -14*
Case drain - L3

1-1/16 -12*(2) places

89.7[3.53]

Port B

Port A

92.1[3.63]
12.8[0.51]

17.8[0.70]

44.5 71.9[1.75] [2.83]

65.9[2.60](2) places

99.1[3.90]

7/8 -14*
Case drain - L2

161.3
[6.35] 184.9[7.28]Side Ports
67.3[2.63]

65.91[2.60]

29 [1.14](2) Places

218.29[8.594] 184.0[7.25]

1-1/16 -12*(2) places

67.3[2.63]

21.1 [0.83]
Fulll spline length
89.7[3.53]

70.5[2.77]
71.9[2.83]

50.813[2.000]
7/8 -14* 1/2 -13 Thd.
92 [23.3] min. full Thd.
Case drain - L3
(2) places

92.1[3.63]
12.8[0.51]

21.72[0.855]

Aux. shaft option
Approx. centerof gravity
36.8 max.
[1.45]

6.3[0.25]

99.1[3.90]
151.00[5.95]
161.3[6.35]

7/8 -14*
Case drain - L2

Coupling must not
protrude beyond
this surface
Auxiliary drive spline data:
20.638 [0.8125] pitch diameter
30° pressure angle
13 teeth, 16/32 pitch
fillet root side fit
ANSI B92.1-1790 class no. 5
also mates with flat root side fit

Side Ports with thru shaft

P100568*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.

© Danfoss | February 2024

BC152886483445en-000902 | 33

Technical Information
Series 40 Axial Piston Motors
Installation drawings
M35/M44 MV: twin ports

9/16 -18*
System pressuregauge Port M2

92.2[3.63]

95[3.74]

Displacement
limiter

96.5[3.80]

7.6[0.301]

9/16 -18*
system pressuregauge Port M1

101.57[3.999]80.5[3.17]

Port Bmin.
Disp.

16° max.
Disp.

Port A

12.6[0.50]

66.7[2.63]

96.4[3.80]

1-1/16 -12*
Case outlet
1-1/16 -12*
Port A35[1.38]
35[1.38]
1-1/16 -12*
Port B

164.7[6.48]
P100570E*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.

34 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Installation drawings
M35/M44 MV: mounting flange, trunnion control
125[4.92]

70.4[2.77]

111. 8[4.40]CCW

CW
Control trunnion
right side
option R

Control trunnion
left side
option L

87.25[3.44]
73.03[2.875]

14.5 dia.
[0.562](2) places45°

19.01 [0.750](2) places

19.84[0 .781]

Trunion Control
P100571*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.
M46 MV: side ports, loop flushing
Flow direction© Danfoss | February 2024

Motor shaft direction

Port APort B

Clockwise (CW)

Out

In

Counterclockwise (CCW)

In

Out

BC152886483445en-000902 | 35

Technical Information
Series 40 Axial Piston Motors
Installation drawings

1-1/16 - 12*case outlets
por ts L1 and L2
71.6 [2.82](4) places
68.1 [2.68](to L1)228[8.98]
74.7 [2.94](2) placescase outlet L1(opposite side)

30 [1.18](2) places

200.5[7.90]

X2(ref.)

63.5 [2.50](4) places
72.6 min.
[2.86]
101.6 dia.
[4.000]71.1 [2.80](2) places

Case outlet L2(alternate)82.6 [3.25](to L2)

1-5/16 - 12*
po rt A

X1
(ref.)
139.6 [5.50](2) places

1-5/16 - 12*
po rt B

22.61 [0 .890]
9.7 [0.38]

Radial (side) Ports without Loop Flushing
Loop flushingrelief valve

7/16 - 20*
gauge por ts M1 and M2

229.7[9.04]
Loop flushing
shuttle v alve
98.3
[3.87]

80.9[3.19]

68.8 [2.71](2) places
1-5/16 - 12*
Port A

1-5/16 - 12*
Port B

194.7[7.66]

P100572

Radial (side) Ports with Loop Flushing36 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Installation drawings*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.
M46 MV: axial ports, loop flushing
Axial ports w/ loop flushing
Loop flushingrelief valve

7/16 - 20*
gauge por ts M1 and M2

229.7[9.04]
Loop flushing
shuttle valve
98.3[3.87]

89.7 [3.53]
w/o loop
flushing

63.5[2.50]

80.9[3.19]

1-1/16 - 12*
po rt A
71.6 [2.82](2) places

42.4 [1.67](2) places

1-1/16 - 12*
po rt B

P100 573E*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.

© Danfoss | February 2024

BC152886483445en-000902 | 37

Technical Information
Series 40 Axial Piston Motors
Installation drawings
M46 MV: side ports, thru shaft twin ports, loop flushing

20.638 [0.8125] pitch dia.
30° pressure angl e
13 teeth, 16/32 pitc hfillet root side fit
per ANSI B92.1,class no.5
(also mates with flatroot side fit)

58.9
[2.32](2) places
1/2 - 13 Thd.
thr u(2) places

7.7[0.303]25.4[1.00]

50.8[2.00](2) places
50.813ø [2.0005]

ø 21.717 [0.8550]

13.49 dia. thru
[0.531](2) places21.1 [0.83] Full Spline
37.3 [1.47]
40.0 [1.57] max.

Side Ports with Thru Shaft

Radial (side) Ported with Loop Flushingwith Thru Shaft

Loop flushingrelief valve

7/16 - 20*
gauge por ts M1 and M2

229.7[9.04]
Loop flushing
shuttle valve

98.3[3.87] 89.7 [3.53]
w/o loop
flushing

68.5[2.69]

1-1/16 - 12*
po rt A
29.7 [1.17](2) places

38 | © Danfoss | February 2024

1-1/16 - 12*
po rt B

Radial (twin) Ports with Loop Flushing

199.6[7.86]

P100574

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Installation drawings*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.
M46 MV: mounting flange
14.27 dia. thru
[0.562](2) places

89.1[3.51]

CCW

CW

73.02
[2.875](2) places

87.2[3.44](2) places82[3.23]

115.1[4.53]

73.7[2.90]
P100575E*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.

© Danfoss | February 2024

BC152886483445en-000902 | 39

Technical Information
Series 40 Axial Piston Motors
Installation drawings
M46 MV: control ports
Min. displacement adjustment screw(3/16 in. internal hex)
104.1
[4.10]

100.6 max
[3.96]

89.1[3.51](ref)80.5[3.17]

99.6 max.
[3.92]

103.9[4.09]

9/16 - 18*
Control pressure
port X1

Max. displacement
adjustment screw(screwdriver slot)

78.7[3.10]

Control w/ bottom pressure supply port andexternally adjustable displacement limiters
9/16 - 18*
Control pressuret X2 por

80.5[3.17]

80.5[3.17]

9/16 - 18*
Control pressure port X1

78.7[3.10]
Both sides

Control w/ top and bottom pressure supply ports
P100576*All ports are SAE straight thread o-ring ports per SAE J514, unless otherwise specified.
Shaft rotation is determined by viewing motor from output shaft end.
Contact Danfoss Application Engineering for specific installation drawings.

40 | © Danfoss | February 2024

BC152886483445en-000902

Technical Information
Series 40 Axial Piston Motors
Schematics
Motor Schematics
M1

L2

M1

L2

M2

L1

A

A

B

B
M2

L1

M35/M44 fixed motor schematics(no loop flushing)
M1

M35/M44 fixed motor schematics

L2

M1

A

A

B

B

X2 X1

L2

M2

L1

M35/M44 variable motor schematics

M2

L1

M46 variable motor schematics
P100579© Danfoss | February 2024

BC152886483445en-000902 | 41

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© Danfoss | February 2024

BC152886483445en-000902