Service Manual

H1B 060/080/110/160/210/250
H1 Bent Axis Motors

www.danfoss.com

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc

Revision history

2 | © Danfoss | July 2024

Table of revisions
Date

ChangedRev

July 2024

Added metric information

0608

March 2020

Added adjustment details for threshold settings and changed document number fromAX00000025

0607

August 2019

Added caution for servo piston removal

0505

August 2018

update adjustment chapter

0504

April 2018

Major layout update, QF080 to QM050 updates

0503

January 2018

update pressure compensator torque values

0502

July 2016

Add G1, G2 controls

0501

December 2015 Add 210 frame size

0500

November 2015 Model code change

0400

July 2015

correct torque values, pages 61, 62

0301

June 2015add hydraulic controls THHA, THHB

0300

2008-2015

First edition - and next various changes.

AA-CB

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Contents
Introduction
About this manual............................................................................................................................................................................5
Warranty.............................................................................................................................................................................................. 5
General Instructions........................................................................................................................................................................ 5
Safety precautions............................................................................................................................................................................5
Symbols used in Danfoss literature............................................................................................................................................7
H1 general information
Design of H1 bent axis motor...................................................................................................................................................... 8
About the H1 motors....................................................................................................................................................................10
H1 pictorial diagram..................................................................................................................................................................... 11
H1 system schematic.................................................................................................................................................................... 12
Technical specifications
General specifications.................................................................................................................................................................. 13
Physical properties........................................................................................................................................................................ 13
Operating Parameters.................................................................................................................................................................. 14
H1B speed range diagrams for open and closed circuit..................................................................................................15
Required inlet pressure diagrams (for cylinder block filling)......................................................................................... 16
Open circuit requirements..........................................................................................................................................................17
Fluid specifications........................................................................................................................................................................18
Determination of nominal motor size.................................................................................................................................... 18
Operation
Shaft rotation direction................................................................................................................................................................19
Loop flushing shuttle spool........................................................................................................................................................21
Loop flushing relief valve............................................................................................................................................................ 22
Speed sensor................................................................................................................................................................................... 23
Displacement limiter.....................................................................................................................................................................23
Operating parameters
Output speed...................................................................................................................................................................................24
System pressure............................................................................................................................................................................. 24
Case pressure...................................................................................................................................................................................25
External shaft seal pressure........................................................................................................................................................25
Temperature.................................................................................................................................................................................... 25
Fluid and filter maintenanceFluid and filter recommendations........................................................................................................................................... 26
Pressure measurements
Ports and Gauge Information.................................................................................................................................................... 27
Initial startup procedures
Procedure..........................................................................................................................................................................................29
Troubleshooting
Overview........................................................................................................................................................................................... 31
Electrical troubleshooting.......................................................................................................................................................... 31
Sluggish operation........................................................................................................................................................................ 31
System operating hot...................................................................................................................................................................31
Excessive noise or vibration....................................................................................................................................................... 32
Motor operates normally in one direction only..................................................................................................................32
Improper output speed............................................................................................................................................................... 32
Low output torque........................................................................................................................................................................ 32
Required tools and standard procedures
Adjustments
Optional threshold adjustment – Electric proportional controls................................................................................. 36
Optional threshold adjustment – Hydraulic proportional controls.............................................................................37
Pressure Compensator OverRide (PCOR) adjustment...................................................................................................... 38
Minor repair© Danfoss | July 2024

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Contents
Shaft seal........................................................................................................................................................................................... 41
Electric proportional solenoid replacement........................................................................................................................ 43
Hydraulic proportional actuator replacement.................................................................................................................... 44
Control module replacement.................................................................................................................................................... 45
Electric proportional control module..................................................................................................................................... 47
Hydraulic proportional control module.................................................................................................................................50
Electric two-position control module.....................................................................................................................................52
Hydraulic two-position control module................................................................................................................................ 55
Hydraulic two-position control module with PCOR..........................................................................................................56
Hydraulic two-position control module with PCOR and hydraulic BPD.................................................................... 57
Maximum displacement limiter two-position controls................................................................................................... 59
Servo piston cover – proportional control............................................................................................................................60
Replace speed sensor................................................................................................................................................................... 63
Loop flushing spool.......................................................................................................................................................................64
Loop flushing charge relief valve............................................................................................................................................. 65
Minimum Displacement limiter................................................................................................................................................66
Torque chart
Fasteners, plugs with torque chart..........................................................................................................................................67

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Introduction
About this manualThis manual includes information for the installation, maintenance, and minor repair procedures for H1
bent axis motors. It includes a description of the unit and its individual components, troubleshooting
information, and minor repair procedures.
Performing minor repairs may require removal from the vehicle/machine. Thoroughly clean the unit
before beginning maintenance or repair activities. Since dirt and contamination are the greatest enemiesof any type of hydraulic equipment, follow cleanliness requirements strictly. This is especially importantwhen changing the system filter and when removing hoses or plumbing.
Only Danfoss global service partners (GSPs) are authorized to perform major repairs.Danfoss trains Global
Service Partners and certifies their facilities on a regular basis. You can locate your nearest service partnerat www.danfoss.com > Contact us > Danfoss sales and services > Distributor and service partners
Warranty
Performing installation, maintenance, and minor repairs according to the procedures in this manual will
not affect your warranty. Major repairs requiring the removal of a unit’s rear cover voids the warranty
unless done by a Danfoss Global Service Partner.
General Instructions
When repairing H1 variable displacement closed circuit motors follow these general procedures:
Remove the unit

Chock the wheels on the vehicle or lock the mechanism to inhibit movement.
Prior to performing repairs, remove the unit from the vehicle/machine. Be awarethat hydraulic fluid may be under high pressure and/or hot. Inspect the outside of
the motor and fittings for damage. Cap hoses after removal to prevent
contamination.

Keep it clean

Cleanliness is a primary means of assuring satisfactory motor life, on either new or
repaired units. Clean the outside of the motor thoroughly before disassembly.
Take care to avoid contamination of the system ports. Cleaning parts with a clean
solvent wash and air drying is usually adequate. Keep all parts free of foreignmaterials and chemicals. Protect all exposed sealing surfaces and open cavities
from damage and foreign material.

Lubricate moving
parts

During assembly, coat all moving parts with a film of clean hydraulic oil. Thisassures that these parts are lubricated during start-up.

Replace all O-rings Danfoss recommends you replace all O-rings and gaskets during repair. Lightly
lubricate O-rings with clean petroleum jelly prior to assembly.
and gaskets

Secure the unit

For repair, place the unit in a stable position with the shaft pointing downward.
Secure the motor while removing and torquing components and fasteners.

Safety precautions
Always consider safety precautions before beginning a service procedure. Protect yourself and othersfrom injury. Take the following general precautions whenever servicing a hydraulic system.

© Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Introduction
Unintended machine movement

W Warning
Unintended movement of the machine or mechanism may cause injury to the technician or bystanders.
To protect against unintended movement, secure the machine or disable/disconnect the mechanism
while servicing.
Flammable cleaning solvents

W Warning
Some cleaning solvents are flammable. To avoid possible fire, do not use cleaning solvents in an area
where a source of ignition may be present.
Fluid under pressure

W Warning
Escaping hydraulic fluid under pressure can have sufficient force to penetrate your skin causing serious
injury and/or infection. This fluid may also be hot enough to cause burns. Use caution when dealing withhydraulic fluid under pressure. Relieve pressure in the system before removing hoses, fittings, gauges, orcomponents. Never use your hand or any other body part to check for leaks in a pressurized line. Seek
medical attention immediately if you are cut by hydraulic fluid.
Personal safety

W Warning
Protect yourself from injury. Use proper safety equipment, including safety glasses, at all times.
Hazardous material

W Warning
Hydraulic fluid contains hazardous material. Avoid prolonged contact with hydraulic fluid. Always
dispose of used hydraulic fluid according to environmental regulations.

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Introduction
Symbols used in Danfoss literature
WARNING may result in injury

Tip, helpful suggestion

CAUTION may result in damage to product orproperty

Lubricate with hydraulic fluid

Reusable part

Apply grease / petroleum jelly

Non-reusable part, use a new part

Apply locking compoundNon-removable item

Inspect for wear or damage

Option - either part may exist

Clean area or part

Superseded - parts are not interchangeable

Be careful not to scratch or damage

Measurement required

Note correct orientation

Flatness specification

Mark orientation for reinstallation

Parallelism specification

Torque specification

External hex head

Press in - press fit

Internal hex head

Pull out with tool – press fit

Torx head

Cover splines with installation sleeve

O-ring boss port

Pressure measurement/gauge location or
specification

The symbols above appear in the illustrations and text of this manual. They are intended to communicate
helpful information at the point where it is most useful to the reader. In most instances, the appearanceof the symbol itself denotes its meaning. The legend above defines each symbol and explains its purpose.

© Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
H1 general information
Design of H1 bent axis motor
Cross-section of H1 motor with electric proportional control

1

2

5

3
4

6

7

10
9
8
P005 917

1. Differential servo piston
2. Valve segment
3. Bearing plate
4. Tapered roller bearing
5. Loop flushing relief valve
6. Ramp spring
7. Loop flushing shuttle spool
8. Electric proportional control
9. Minimum displacement limiter
10. Speed ring (optional)

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
H1 general information
Cross-section of H1 motor with electric two-position control

7
6

1

2
3
4

5

9
8

P005 918

1. Differential servo piston
2. Valve segment
3. Bearing plate
4. Tapered roller bearing
5. Loop flushing relief valve
6. Loop flushing shuttle spool
7. Electric two-position control
8. Minimum displacement limiter
9. Speed ring (optional)© Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
H1 general information
About the H1 motors
Series H1 variable displacement motors are bent axis design, incorporating spherical pistons.
These motors are designed primarily to be combined with other products in closed circuit systems totransfer and control hydraulic power. Series H1 motors have a large maximum/minimum displacement
ratio of 5:1 and high output speed capabilities.
The expanded function of zero degree capability, coupled with a high performance 32 degree maximum
angle, creates opportunities to easily improve the machine performance for:• Wheel assist on the steering axle of high inertia machines (i.e. combines) and could include Anti Slip
Control• Off-highway machines requiring Anti Slip Control (i.e. Ag. sprayer)••

Multi-motor applications requiring optimized work and transport modes (i.e. wheel loader, Ag
sprayer) utilizing the zero degree position for maximum transport speed
Improved machine (i.e. single drum roller) gradeability through precise Anti Slip Control

The Anti Slip Control reduces ground damage, increases traction control and improves machine
controllability for the operator.
SAE, Cartridge (not available for 210 cm3 and 250 cm3) and DIN flange with radial or axial high pressure
port configurations are available including the loop flushing device.
A complete family of controls and regulators are available to fulfill the requirements of a wide range ofapplications.
Motors normally start at maximum displacement. This provides maximum starting torque for highacceleration.
All controls utilize internally supplied servo pressure. This may be overridden by a pressure compensator
which functions when the motor is operating in motor and pump modes. A defeat option is available todisable the pressure compensator override when the motor is running in pump mode during
deceleration/braking.
The pressure compensator option features a low pressure rise to ensure optimal power utilization
throughout the entire displacement range of the motor.
Speed sensor options are available to cover all frame sizes and flange styles.
They are capable of sensing the following, all in one package:
Speed

•
•
•

Direction (only group "J", option "S")Temperature (only group "J", option "S")The electric controls are specifically designed for the Danfoss family of PLUS+1® microcontrollers foreasy "Plug and Perform" installation.

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
H1 general information
H1 pictorial diagram

3

12

11
17

9

7

5

14

13

6
18
15

16
4
2

10
1

8
5
7
P003 423

Working loop A (Low pressure) and charge pressure
Working loop B (High pressure)
Servo pressure
Case drain
Suction

1. Bent Axis Variable Displacement Motor
2. Axial Piston Variable Displacement Pump
3. Electric Displacement Control (EDC)
4. Charge Pump
5. Charge Check / High Pressure Relief Valve
6. Loop Flushing Valve
7. Pressure Limiter Valve
8. Charge Pressure Relief Valve
9. Servo Cylinder© Danfoss | July 2024

10. Charge Pressure Filter
11. Heat Exchanger
12. Heat Exchanger Bypass Valve
13. Valve Segment
14. Pump Swashplate
15. Input Shaft
16. Output Shaft
17. Reservoir
18. to Motor Case

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
H1 general information
H1 system schematic
System schematic H1 pump and H1 motor with EDC
M14

M6

1

2

R2

R1

C2

C1

M3 L1
F00B

L2

L2 MA

MA N

A A

F00A

n

M5
CW

max.

min.

L1
M4

B B
S L3

L4

MB

M4

M5

MB

max. 3 bar[43.5 psi]
P003 424

The schematic above shows the function of a hydrostatic transmission using an H1 axial variable displacement pump with electric
proportional displacement control (EDC) and an H1 bent axis variable displacement motor with electric proportional control (L*) andintegrated loop flushing device.

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
General specifications
General specifications
DesignPiston motor with variable displacement bent axis design

Direction of rotation

Bi-directional

Pipe connections

Main pressure ports: ISO split flange boss
Remaining ports: SAE straight thread O-ring boss

Recommended installation

Discretionary, the housing must always be filled with hydraulic fluid

Physical properties
Physical properties
Size
Features

Unit
060

080

110

160

210

250

60 [3.66]

80 [4.88]

110 [6.71]

160 [9.76]

210 [12.81]

250 [15.25]

12 [0.73]

16 [0.98]

22 [1.34]

32 [1.95]

42 [2.56]

50 [3.05]

l/min[US gal/min]

216 [57]

256 [68]319 [84]416 [110]504 [133]

550 [145]

270 [71]328 [87]407 [108]528 [139]

630 [166]700 [185]

N•m/bar[lb•in/1000 psi]

0.96 [583]1.27 [777]1.75 [1069]

2.55 [1555]

3.34 [2038]

3.98 [2426]

Theor. corner power at rated speed and max.
kW [hp]working pressure (∆p = 450 bar [6527 psi])

266 [357]

321 [430]

396 [531]

513 [689]

609 [817]

684 [917]

Mass moment of inertia of rotating
components

kg•m2[slug•ft2]

0.0038[0.0028]0.0062[0.0046]0.0108[0.0080]0.0211[0.0156]

0.0306[0.0226]0.0402[0.0296]

Case volume

l [US gal]

0.9 [0.24]

1.0 [0.26]

1.4 [0.37]

2.7 [0.71]

2.8 [0.74]

4.1 [1.08]

maximum

cm3 [in3]

Displacement
minimum
Theoretical flow at
max. displ.

at rated speed
at max. speed

Theoretical torqueat max. displacement

Weight dry (Electric proportional control)
Configuration

Size
060

080

110

160

210

250

SAE

29.8 kg [65.7 lb]

34.8 kg [76.7 lb]

48.8 kg [107.6 lb]

61.9 kg [136.5 lb]

81.0 kg [179 lb]

87.0 kg [196.2 lb]

DIN

28.3 kg [62.4 lb]

34.4 kg [75.8 lb]

45.0 kg [99.2 lb]

59.3 kg [130.7 lb]

75.0 kg [165 lb]

79.6 kg [175.5 lb]

Cartridge

26.9 kg [59.3 lb]

33.0 kg [72.6 lb]

41.8 kg [92.2 lb]

54.7 kg [120.6 lb]––

Mounting flange
Configuration

Size
060

SAE ISO 3019/1

080

127-4 (SAE C) 4-bolt

DIN ISO 3019/2, B4

125 HL 4-bolt

140 HL 4-bolt

Cartridge

Pilot Ø160 mm
2-bolt (200 dist.)
M16

Pilot Ø190 mm
2-bolt (224 dist.)
M20© Danfoss | July 2024

110

160

210

152-4 (SAE-D) 4-bolt
160 HL 4-bolt

180 HL 4-bolt

Pilot Ø200 mm
2-bolt (250 dist.) M20

250
165-4 (SAE E)

200 HL 4-bolt–

200 HL 4-bolt–

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
Customer ports
Size
Axial and radial1)

080

110

160

210

250

DN19 typ 1

DN25 typ 1

DN25 typ 1

DN32 typ 1

DN32 typ 1

DN32 typ 1

0.875 [7∕8]–14UN-2B

Case drain ports2)
Axial gauge
ports2)3)060

1.0625 [11∕16]–12UN-2B

1.313 [15∕16]–12UN-2B]

1.0625 [11∕16]–12UN-2B

0.875 [7∕8]–14UN-2B

0.5625 [9∕16]–18UNF-2B

Radial gauge
port2)3)
1) Split flange Boss per ISO6162, 40 MPa series
2) SAE O-ring boss3) Countersink may be deeper that specified in the standard.

Operating Parameters
Output Speed
Size
Output Speed

Displacement

Unit

Maximum 32°
Rated

Minimum 6°

080

110

160

210

250

3600

3200

2900

2600

2350

2200

5900

5300

4800

4250

3850

3650

6600

5950

5350

4750

4300

4050

4500

4100

3700

3300

3000

2800

Minimum 6°

7250

6600

5950

5250

4800

4500

Zero 0°

7950

7200

6500

5750

5250

4900

Zero 0°Maximum 32°
Maximum

060

min-1
(rpm)

System and Case Pressure, Ambient Temperature
Parameter
System pressure

Case pressure

Ambient temperature3)

All sizes
Maximum working

450 bar [6527 psi]

Maximum

480 bar [6962 psi]

Minimum1)

2)

Rated

3 bar [44 psi]

Maximum

5 bar [73 psi]

Minimum

0.3 bar [4 psi]

Maximum

70 °C [158 °F]

Minimum-40 °C [-40 °F]

1) Minimum above case pressure (open and closed circuit)2) See the graphs Required inlet pressure diagrams (for cylinder block filling) on page 16.
3) Air temperature close to the unit.

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
H1B speed range diagrams for open and closed circuit
Speed (rpm) versus Displacement (%), Intermittent operation (grey area)
8000

8000

H1B 080

H1B 060
7000

7000

6000

6000

5000

5000

4000

4000

3000

3000

2000

2000

1000

1000
0

0
0%

20%

40%

60%

80%

100%
P003 557

20%

40%

60%

80%

100%
P003 509

7000

7000

H1B 110

H1B 160

6000

6000

5000

5000

4000

4000

3000

3000

2000

2000

1000

1000

0
0%

0
20%

40%

60%

80%

0%

100%
P003 511

20%

40%

60%

80%

100%
P301 307

6000

6000

H1B 210

H1B 250

5000

5000

4000

4000

3000

3000

2000

2000

1000

1000

0

0%

0
0%

20%

40%

60%

80%

100%
P006 001

0%

20%

40%

60%

80%

100%
P301 457

W WarningZero degree capability results in a high risk of overspeed and drops in efficiency if the motor operates between 0–20% displacement.
For open circuit applications it is not allowed to operate in the intermitent area.
For closed circuit applications operating in the intermittent area, please contact your local Danfoss Power Solutions representative.
Contact your Danfoss representative for any operation above Rated speed. In these cases, a special option is available for 160cc, 210cc
and 250cc, for applications with speeds between rated speed and maximum speed for delta pressures over 310 bar.

© Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
Required inlet pressure diagrams (for cylinder block filling)
Speed (rpm) and Pressure (bar) versus Displacement (%)
8000

9000

H1B 060

8000

H1B 080

7000

7000

6000

6000

5000

5000
30bar

4000

30bar

20bar
15bar

3000

20bar
15bar

10bar

2000

10bar

5bar
2bar

1000

5bar
2bar

4000
3000
2000
1000
0

0%

20%

40%

60%

80%

100%
P006 010

0

0%

20%

40%

60%

80%

100%
P006 011

Speed (rpm) and Pressure (bar) versus Displacement (%)
7000

7000

H1B 110

6000
5000

5000

4000

30bar

4000

3000

20bar
15bar

3000

2000

10bar

2000

1000

5bar
2bar

1000

0

H1B 160

6000

0%

20%

40%

60%

80%

100%
P006 012

30bar
20bar
15bar
10bar

0

5bar
2bar
0%

20%

40%

60%

80%

100%
P006 013

Speed (rpm) and Pressure (bar) versus Displacement (%)
6000

6000

H1B 210

H1B 250

5000

5000

4000

4000

3000

30bar

3000

2000

20bar
15bar

2000

30bar
20bar
15bar
10bar

10bar
1000

0

5bar
2bar
0%

20%

40%

60%

80%

100%

1000

0

5bar
2bar
0%

20%

40%

60%

80%

P006 014

100%
P006 015

Bold dashed line: Maximum speed
Bold solid line: Rated speed
This pressure ensures that the cylinder block will be properly filled and that there is no pulling between piston and shaft.
The required pressure is 0 bar at 0 rpm and increases with rpm.
For open circuit applications it is not allowed to operate above rated speed. For closed circuit applications operating between rated
and max. speed, please contact your local Danfoss Power Solutions representative.
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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
Open circuit requirements
H1 Bent Axis Motors may be used in Open Circuit (OC) applications.
Since loop flushing is typically not used in OC-applications it is essential to provide sufficient cooling
capacity. This can be done by motor case cross flushing.
The flow rate needs to be adjusted to the cooling demand.
The highest case drain outlet port must always be used for the return flow to the cooler or tank.
The motor case, the control system and the working lines connected to Port A and B must be kept full ofoil at all times, whether in a dynamic or static condition.
The plumbing must not allow the oil to drain down and be replaced with air in the control or rotatinggroup.
The minimum pressure in the inlet port and the outlet port, measured at gage ports MA and MB, must be
equal or higher as shown in the graphs Required inlet pressure diagrams (for cylinder block filling) on page
16.
Counter balance valves may be used to maintain the minimum pressure requirements. Also the Danfoss
Meter-in / Meter-out PVG technology may be used.
Check valves and sufficient charge pressure supply are also possible.
At no time shall the motor be allowed to operate above the rated speed limits. If flow limiter valves areused, they must be selected accordingly. Select Motor controls which use the high loop system pressure
to shift the servo piston. This ensures proper function under all conditions.
Valve blocks, such as counter balance valves attached to the inlet and/or outlet ports, must not interferewith any part of the motor. A review of the outline drawings or appropriate 3D models must becompleted.

© Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
Fluid specifications
Fluid specifications
Features

All sizesUnit

7 [49]

Minimum intermittent
Viscosity

mm2/s
[SUS]

Recommended range

Temperature range1)2)12-80 [66-366]

Maximum intermittent

1600 [7416]

Minimum-40 [-40]
°C
[°F]

Rated

104 [220]
115 [240]

Maximum intermittent-

Required cleanliness per ISO 4406

22/18/13
β15-20 = 75 (β10 ≥ 10)

Efficiency (charge pressure filtration)
β-ratio

Cleanliness and Filtration

β35-45 = 75 (β10 ≥ 2)

Efficiency (suction / return line filtration)
Recommended inlet screen mesh sizeµm

100 – 1251) At the hottest point, normally case drain port.
2) Minimum: cold start, short term t<3 min, p<50 bar, n<1000 rpm.

Determination of nominal motor size
Based on SI units

Based on US units

Qe =Vg • n1000 • v

Me =Vg • p •
20 •

Pe =

Me • nQ • p•
= e
600
9550

n =

Qe • 1000 •
Vg

mh

t

v

Where:

Vg • n231 • vMe =Vg • p •2•

Pe =Vg • n • p •396 000n =Qe • 231 •
Vg

mh

t

v

Where:

Qe

Input flow (l/min)

Qe

Input flow [US gal/min]Me

Output torque (N•m)

Me

Output torque [lb•in]Pe

Output power (kW)Pe

Output power [hp]nSpeed (min-1)nSpeed [rpm]Vg

Motor displacement per rev. (cm3/rev)

Vg

Motor displacement per rev. [in3/rev]

phigh High pressure (bar)18 | © Danfoss | July 2024

Qe =phigh High pressure [psi]plow

Low pressure (bar)plow

Low pressure [psi]∆pHigh pressure minus Low pressure (bar)∆pHigh pressure minus Low pressure [psi]ηvMotor volumetric efficiency

ηv

Motor volumetric efficiency

ηmhMechanical-hydraulic efficiency

ηmhMechanical-hydraulic efficiency

ηtMotor total efficiency (ηv • ηmh)ηt

Motor total efficiency (ηv • ηmh)

AX152886484369en-000608

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Operation
Shaft rotation direction
Shaft rotation direction is determined with a view from the shaft end.
Rotation direction of the motor will be dependent on the control option used as illustrated below.
In the second number or letter of the control code, 1 means 12 VDC, 2 means 24 VDC, and H means
hydraulic.
Controls L1, L2, D1, D2, LH, DH

CCW

CW

A

B

P006030

Flow into port A

Clockwise

Flow into port B

Counterclockwise

Controls M1, M2, K1, K2, KH, MH

CCW

CW

A

B

P006031© Danfoss | July 2024

Flow into port A

Counterclockwise

Flow into port B

Clockwise

AX152886484369en-000608 | 19

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Operation
Controls E1, E2, F1, F2, P1, P2, T1, T2, TA, TH, HE, HF

CCW

CW

B

A

P006032

20 | © Danfoss | July 2024

Flow into port A

Counterclockwise

Flow into port B

Clockwise

AX152886484369en-000608

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Operation
Loop flushing shuttle spool
An integral loop flushing shuttle spool is used to separate system A and system B pressures.
System delta pressure will cause the shuttle spool to shift, allowing the low side system pressure to flow
to the loop flushing relief valve.
A

L2

B

A

LFRV

P006033

Legend:A

System loop A

B

System loop B

LFRVto Loop flushing relief valve

B
P003 437

W Warning
Unintended vehicle or machine movement hazard.
Excessive motor loop flushing flow may result in the inability to build required system pressure in someconditions. Maintain correct charge pressure under all conditions of operation to maintain pump control
performance in hydrostatic systems.

© Danfoss | July 2024

AX152886484369en-000608 | 21

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Operation
Loop flushing relief valve
The loop flushing relief valve is incorporated into all H1 motors and uses the loop flushing option in
installations that require fluid to be removed from the low pressure side of the system circuit due tocooling requirements.
The loop flushing relief valve is also used to facilitate the removal of contaminants from the loop.
The loop flushing valve is equipped with an orificed charge pressure relief valve designed with a cracking
pressure of 16 bar [232 psi].
Valves are available with several orifice sizes to meet the flushing flow requirements of all system
operating conditions.
Loop flushing relief valve schematic

Loop flushing relief valve (cross section)

L2

A

P003 491

B
P003 487

Loop flushing relief valve sizes
5

40 bar

10

15

20

30

40
50

30 barY

20 bar

10 bar

0

10

20

30

X

22 | © Danfoss | July 2024

40

50

60
P006 034

X

Loop flushing flow (l/min)Y

Low system pressure minus case pressure (bar)AX152886484369en-000608

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Operation
Speed sensor
The speed sensor is designed for rugged outdoor, mobile or heavy industrial speed sensing applications.
The detection of the speed is contactless and does not need any calibration or adjustments.
For more information, see Speed and Temperature Sensor, Technical Information, BC152886482203.
Sensor position
Sensor position in SAE, DIN and Cartridge housing.
Cartridge housing

SAE and DIN housing

P003489
P003450

Target Ring
Speed (target) rings vary according to the diameter of the cylinder block or shaft on which they are
installed. The number of teeth is shown in the table below.
The number of speed (target) ring teeth
H1B and H1F size

060

080

110

160

210

250

Teeth

71

78

86

95

104

108

Excessive axial shaft loading during installation of motors with speed sensors and cartridge housingsmust be avoided. High axial shaft loads during installation of motors can lead to a movement of the shaft
and damage the speed sensor.

Displacement limiter
All Series H1 motors incorporate mechanical displacement limiters.
The minimum displacement of the motor is preset at the factory with a set screw in the motor housing. A
tamper-proof cap is provided.
For 0° motors, the minimum displacement screw can be substituted with a plug that uses less space.

© Danfoss | July 2024

AX152886484369en-000608 | 23

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Operating parameters
Output speed
Start and low speed stability. The motor produces maximum starting torque at maximum
displacement. Stable operation can be achieved at 15–34 rpm, ± 5 %, depending on system pressure, inapplications that require low speed stability. Motor output speed becomes more stable as speed
increases.
Rated speed is the highest output speed recommended at full power condition. Operating at, or below
this speed will yield satisfactory product life.
Maximum speed is the highest operating speed permitted. Exceeding maximum speed reduces the
product life and can cause loss of hydrostatic power and dynamic braking capacity. Never exceed the
maximum speed limit under any operating conditions.
Operation between rated and maximum speed is reserved for intermittent operation (see H1B speed
range diagrams for open and closed circuit on page 15) not to exceed 10 minutes durations, 2% of duty
cycle based load-life, and 310 bar system delta pressure. Speed above rated are anticipated to occur
during downhill braking (negative power). Contact factory for any operation above Rated speed whennegative power is not involved.
During hydraulic braking and downhill conditions, the prime mover must be capable of providing
sufficient braking torque in order to avoid pump over speed. This is especially important to consider forturbocharged and Tier 4 engines.

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

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. For
applications which are above the maximum working pressure, please contact Danfoss
Minimum pressure must be maintained under all operating conditions to avoid cavitation.
All pressure limits are differential pressures referenced to low loop (charge) pressure. Subtract the low
loop gauge pressure from the high loop gauge pressure readings to compute the differential.
Summing pressure is the sum of both the low and high loop pressures. Summing pressure above 30 bar[435 psi] guarantees reliable use within the rated speed.
Servo pressure is the pressure in the servo system and is supplied from the high side of the loop to keep
the motor at the required displacement.

24 | © Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
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, gaskets, speed sensors and/or
housings, causing external leakage. Performance may also be affected since charge and system pressures
are referenced to case pressure.

External shaft seal pressure
In certain applications, the output shaft seal may be exposed to external pressures. The shaft seal isdesigned to withstand an external pressure up to 0.25 bar [3.6 psi] above the case pressure. The casepressure limits must also be followed to ensure the shaft seal is not damaged.
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. Therefore, temperatures should remain 16 °C [30 °F] above thepour point of the hydraulic fluid.
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.

© Danfoss | July 2024

AX152886484369en-000608 | 25

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Fluid and filter maintenanceFluid and filter recommendations
To ensure optimum life, perform regular maintenance of the fluid and filter. Contaminated fluid is themain cause of unit failure. Take care to maintain fluid cleanliness when servicing.
Check the reservoir daily for proper fluid level, the presence of water, and rancid fluid odor. Fluid
contaminated by water may appear cloudy or milky or free water may settle in the bottom of thereservoir. Rancid odor indicates the fluid has been exposed to excessive heat. Change the fluid
immediately if these conditions occur. Correct the problem immediately.
Inspect vehicle for leaks daily.
Change the fluid and filter per the vehicle/machine manufacturer’s recommendations or at theseintervals. We recommend first fluid change occur at 500 hours of operation. Change the fluid more
frequently if it becomes contaminated with foreign matter (dirt, water, grease, etc) or if the fluid issubjected to temperature levels greater than the recommended maximum.
Fluid and filter change interval
Reservoir typeMax oil change interval

Sealed2000 hours

Breather

500 hours

C Caution
High temperatures and pressures accelerate fluid aging. This may require more frequent fluid changes.
Change filters when changing fluid or when the filter indicator directs. Replace all fluid lost during filter
changeW Warning
Hydraulic fluid contains hazardous material. Avoid contact with hydraulic fluid. Always dispose of usedhydraulic fluid according to state, and federal environmental regulations. Never reuse hydraulic fluid.

26 | © Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Pressure measurements
Ports and Gauge Information
The following drawing with accompanying table show the port locations and gauge sizes needed for
installation.
Ports locations (proportional control)

M5(M4 onreverse side)MA(MB onreverse side)
SystemPort AXB(Port XA
on reverse side)

L2

SystemPort B

X1
Axial Ported Endcap
M5(M4 on reverse side)
L1
System Port A(System Port B
on reverse side)
MA
MB

XB
(Port XA
on reverse side)

L2
Radial Ported Endcap

X1
P108829

System split flange boss ports, A/B: Code 62 per ISO 6162, Type 1
Port

Size 060

Size 080, 110

Size 160, 210, 250

A, B

3/4 in; Thread: M10 x 1.5
min. 18 mm [0.71 in]

1 in; Thread: M12 x 1.75
min. 23 mm [0.91 in]

1 1/4 in; Thread: M12 x 1.75
min. 23 mm [0.91 in]Radial/Axial end-cap ports - Inch Version© Danfoss | July 2024

Port

Size 060

Size 080, 110, 160, 210, 250

System pressure obtained

MA, MB (Radial)

7/8-14 UNF
Wrench (int. hex): 3/8 in

1 1/16-12UN
Wrench (int. hex): 9/16 in

600 bar [8702 psi]

MA, MB (Axial)

9/16-18 UNF
Wrench (int. hex): 1/4 in

9/16-18 UNF
Wrench (int. hex): 1/4 in

600 bar [8702 psi]

AX152886484369en-000608 | 27

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Pressure measurements
Radial/Axial end-cap ports - Metric Version
Port

Size 060

Size 080, 110, 160, 210, 250

System pressure obtained

MA, MB (Radial)M22 x 1.5
Wrench (int. hex): 10mm

M27 x 2
Wrench (int. hex): 12mm

600 bar [8702 psi]

MA, MB (Axial)

M14 x 1.5
Wrench (int. hex): 6mm

M14 x 1.5
Wrench (int. hex): 6mm

600 bar [8702 psi]

Ports and gauge Information - Inch version
Port

Size 060

Size 080,110,160

Size 210,250

Pressure obtained

L1, L2

7/8-14 UNF
Wrench: 3/8 in

1 1/16-12UN
Wrench: 9/16 in

1 5/16-12UN
Wrench: 5/8 in

10 bar [145 psi]
Case drain

M4, M5

9/16-18 UNF; Wrench (int. hex): 1/4 in

600 bar [8700 psi] 1)

X1, XA, XB

9/16-18 UNF; Wrench (int. hex): 1/4 in

100 bar [1450 psi] 2)

1) Servo pressure rod end.
2) X1 – Control pressure supply, hydraulic actuator. XA/XB – BPD, PCOR inactive at A/B.

Ports and gauge Information - Metric version
Port

Size 060/080

Size 110/160

Size 210/250

Pressure obtained

L1, L2

M22 x 1.5
Wrench (int. hex): 10mm

M27 x 2
Wrench (int. hex): 12mm

M33 x 2
Wrench (int. hex): 14mm

10 bar [145 psi]
Case drain

M4, M5

M14 x 1.5
Wrench (int. hex): 6mm

600 bar [8700 psi] 1)

X1, XA, XB

M14 x 1.5
Wrench (int. hex): 6mm

100 bar [1450 psi] 2)

1) Servo pressure rod end.
2) X1 – Control pressure supply, hydraulic actuator. XA/XB – BPD, PCOR inactive at A/B.

Port locations (hydraulic 2-position controls with PCOR; control specific ports only)
X1

XB(Port XA
on reverse side)

P108924

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Initial startup procedures
Procedure

W WarningThis service procedure may require disabling the vehicle / machine (raising the wheels off the ground,
disconnecting work function) while performing, to prevent injury to the technician and bystanders. Take
the necessary safety precautions.
Always follow this procedure when starting-up a new H1 installation or when the motor has been
removed.
1. Before installing the motor, inspect the units for possible damage incurred during shipping andhandling.
2. Make certain all system components (reservoir, hoses, valves, fittings, heat exchanger, and so forth)
are clean before filling with fluid.
3. Fill the reservoir with recommended hydraulic fluid. Pass this fluid through a 10 micron (nominal, no
bypass) filter before it enters the reservoir.
4. Fill the inlet line leading from the reservoir to the pump.
5. Check inlet line for properly tightened fittings. Make sure the inlet line is free of restrictions and airleaks.
6. Fill the motor and pump housings with clean hydraulic fluid before start up. Fill by pouring filtered oil
into the upper case drain port.

C Caution
Never start the prime mover unless the motor and pump housings are filled completely with clean
hydraulic fluid.
7. For closed loop systems, install a 0-60 bar [0-1000 psi] pressure gauge in the charge pressure gauge
port of the pump to monitor the charge pressure during start-up.
For open circuit systems, use gauges in system ports.
8. Disconnect any external control input signal from the pump control until after initial start-up. This
ensures that the pump remains in its neutral position.
9. Jog (slowly rotate) prime mover until charge pressure starts to rise.
10. Start the prime mover and run at the lowest possible speed until charge pressure builds.

W Warning
Do not start the prime mover unless the pump is in neutral position (swash plate at 0° angle). Take
necessary precautions to prevent machine movement in case pump is actuated (in stroke) duringinitial start-up.
If necessary, bleed excess air from the high pressure lines through the high pressure system gauge
ports.
11. Once charge pressure is established, increase to normal operating speed. Charge pressure should be
as indicated in the pump model code. If charge pressure is low, shut down and determine cause.

C Caution
Low charge pressure may affect ability to control the machine.
12. Shut down the prime mover.
13. Connect the external control input signal.
14. Reconnect the machine function if disconnected earlier.
15. Start the prime mover, checking to ensure the pump remains in neutral.
© Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Initial startup procedures
16. Check for forward and reverse machine operation, with the prime mover at normal operating speed.
Charge pressure may decrease slightly during forward or reverse operation.
17. Continue to cycle slowly between forward and reverse for at least five minutes.
18. Shut down prime mover.
19. Remove gauges. Replace plugs at the gauge ports.
20. Check reservoir level. Add filtered fluid if needed.
The motor/transmission is now ready for operation.

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Troubleshooting
Overview
This section provides general steps to follow if you observe undesirable system conditions. Follow thesteps until you solve the problem. Some of the items are system specific. Always observe the safety
precautions in the Introduction section.

W Warning
Unintended movement of the machine or mechanism may cause injury to the technician or bystanders.
To protect against unintended movement, secure the machine or disable/disconnect the mechanism
while servicing.

Electrical troubleshooting
Check

Cause

Corrective action

1.

Motor operates at one
displacement only.

Control coil failure

Measure resistance at coil pins. Resistance at 20°C
[70°F] should be:• Proportional controls: 14.20 Ω (24V) or 3.66 Ω (12V)• Two-position controls: 8.4 Ω (24V) or 34.5 Ω (12V)
Replace coil if necessary.

2.

Erratic motor function

Electrical connection to motor is intermittent.

Disconnect connector, check wires and terminals,
reconnect wires. Check terminals for corrosion andcorrect position.

Cause

Corrective action

Sluggish operation
Check
1.

Control orifices

Blocked or restricted orifice may cause sluggish
response. Orifices installed in the wrong locations
may cause PCOR control to be sluggish.

Remove, inspect and clean all orifices. Ensure theappropriate orifices are installed and in the correct
location.

2.

Threshold setting (proportional
controls)

Inappropriately high or low threshold setting may
shift the motor at the wrong time.

Check threshold setting. Adjust if necessary.

3.

Control spool

A sticky control may cause sluggish response or no
response.

Clean and inspect the control spool. Replace ifnecessary.

4.

Pressure compensator setting

Low pressure compensator setting may shift motor Check pressure compensator setting. Adjust if
to maximum displacement at lower pressure.
necessary.

5.

Control input signal

An improper or erratic input signal to the control
may cause sluggish response.

Check input signal and correct if necessary.

6.

Internal leakage

Excessive leakage will cause lower charge pressure
and affect performance.

Install loop flushing defeat option and measure caseflow. If case flow is excessive, motor may require major
repair. Contact your Danfoss authorized service
center.

Cause

Corrective action

System operating hot
Check
1.

Oil level

Insufficient hydraulic fluid may cause overheating.

Fill reservoir to proper level.

2.

Heat exchanger

Blocked heat exchanger or low air flow may cause
system overheating.

Check temperature upstream and downstream of heatexchanger. Clean, repair, or replace heat exchanger ifnecessary.

3.

Loop flushing flow

Restricted orifice in loop flushing cartridge reduces Measure case drain flow. Clean or replace orificeflow.
cartridge.

4.

Loop flushing shuttle

Loop flushing shuttle may be sticking in one
direction.

© Danfoss | July 2024

Ensure shuttle moves freely in its bore.

AX152886484369en-000608 | 31

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Troubleshooting
Check

Cause

Corrective action

5.

Air in system

Entrained air generates heat under pressure

Look for foam or bubbles in reservoir. Check for leaks
on inlet side of charge pump.

6.

Internal leakage

Excessive internal leakage may overheat thesystem.

Install loop flushing defeat option and monitor caseflow. If case flow is excessive, motor may require major
repair. Contact your Danfoss authorized service
center.

Cause

Corrective action

Excessive noise or vibration
Check
1.

Oil level in reservoir

Insufficient hydraulic fluid may cause cavitation.

Fill reservoir to proper level.

2.

Air in system

Air bubbles may lead to cavitation.

Look for foam or bubbles in reservoir. Check for leaks
on inlet side of charge pump.

3.

Shaft coupling

Loose shaft coupling may create excess noise.

Replace loose shaft coupling. Replace or repair motor
if shaft splines show excessive wear.

4.

Shaft alignment

Misaligned shafts may create excessive noise andvibration and can damage motor.

Correct shaft misalignment.

Motor operates normally in one direction only
Check
1.

Charge pressure

Cause

Corrective action

If charge pressure is low in one direction, the loop
flushing shuttle spool may be sticking to one side.

Measure charge pressure in forward and reverse. If
pressure drops significantly lower in one direction,
inspect and repair loop flushing shuttle spool.

Cause

Corrective action

Improper output speed
Check
1.

Oil level in reservoir

Insufficient hydraulic fluid may reduce systemefficiency.

Fill reservoir to proper level.

8.

Internal leakage

Excess internal leakage may cause lower chargepressure and affect motor performance including
output speed.

Install loop flushing defeat option and measure caseflow. If case flow is excessive, motor may require major
repair. Contact your Danfoss authorized service
center.

Cause

Corrective action

Low output torque
Check
1.

Pressure compensator settingHigh pressure compensator setting may cause
improper motor displacement for torque required.

Check and adjust pressure compensator setting.

2.

Control orifices

Blocked or restricted orifice may cause motor toshift improperly.

Remove, inspect and clean all orifices.

3.

Pressure compensator spool

Sticking pressure compensator spool may cause
control to hold motor at minimum displacement.

Remove and inspect pressure compensating spool.
Repair or replace control if necessary.

4.

Control spool

Sticking control spool may cause motor to shift
improperly.

Remove and inspect control spool. Repair or replace
control if necessary.

5.

Two position solenoid

Two position control not shifting motor to
maximum displacement.

Inspect solenoid valve for bent stem or damaged coil.
Repair or replace if necessary.

6.

Control input signal

Improper control input signal may cause motor tostay at minimum displacement.

Correct control input signal.

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Troubleshooting
Check

Cause

Corrective action

7.

Threshold setting(proportional control)

Improper threshold setting may cause improper
motor displacement for torque required.

Check and adjust threshold setting.

8.

Internal leakage

Excess internal leakage may cause charge pressure
to decay, reducing output torque.

Install loop flushing defeat option and monitor caseflow. If case flow is excessive, motor may require major
repair. Contact your Danfoss authorized service
center.

© Danfoss | July 2024

AX152886484369en-000608 | 33

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Required tools and standard procedures
Required tools
The service procedures described in this manual can be performed using common mechanic’s handtools. Special tools, if required, are shown. When testing system pressures, calibrate pressure gauges
frequently to ensure accuracy. Use snubbers to protect gauges.
Standard procedures

C Caution
Contamination can damage internal components and void the manufacturer’s warranty. Take
precautions to ensure system cleanliness when removing and reinstalling system lines
1. With the prime mover off, thoroughly clean all dirt and grime from the outside of the motor. Ensure
the surrounding areas are clean and free of contaminants such as dirt and grime.
2. If removing the motor, tag each hydraulic line connected to the motor. If you disconnect hydrauliclines, plug each open port to keep dirt and contamination out of the motor.
3. Inspect the system for contamination. Look at the hydraulic fluid for signs of system contamination,such as oil discoloration, foam in the oil, sludge, or small metal particles.
4. Remove the motor as a single unit.

C Caution
Be careful not to damage solenoids and electrical connections when using straps or chains to remove
motor from machine.
5. Perform motor function test.
6. Before re-installing the motor on the machine, drain the system, flush all lines, replace all filters, andfill with new hydraulic fluid.

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Adjustments
Adjusting the minimum displacement limiter
Minimum displacement limiter

N1000

19 mm
45 N•m[32 lb•ft]
N2000

6 mm

N0120

1. Remove cap (N0120).
Removing the cap destroys the caps locking mechanism. Replace with a new cap.
2. Using a 6 mm internal hex wrench, hold adjusting screw (N1000) in place.
3. Using a 19 mm hex wrench, loosen seal locknut (N2000).
4. Turn adjusting screw clockwise to increase minimum displacement or counterclockwise to decreaseminimum displacement.
Minimum displacement is inversely related to maximum shaft speed. To increase maximum speed,decrease minimum displacement. Adjusting displacement limits also affects output torque. Refer tothe table below for displacement change per turn.
Displacement change per turn
Size

060

080

110

160

210

250

Displacementchange2.1 cm3[0.13 in3]

2.6 cm3[0.16 in3]

3.2 cm3[0.20 in3]

4.1cm3[0.25 in3]

5.1 cm3[0.31 in3]

5.5 cm3[0.34 in3]

5. When properly adjusted, hold adjusting screw in place and torque seal lock-nut to 45 N•m [32 lbf•ft].
6. With motor on machine or test stand, verify correct motor function. Refer to Ports and Gauge
Information on page 27 for location of gauge ports and suggested gauge sizes.
7. Install new cap (N0120).

© Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Adjustments
Optional threshold adjustment – Electric proportional controls
Adjusting threshold on test stand1. Connect flow meter to A or B system port. Refer to Ports and Gauge Information on page 27 for port
locations.
2. Connect solenoid to PWM signal generator at 150 Hz.
Threshold is the electric signal when the motor starts to change from maximum to minimum
displacement.
3. Run prime mover at operating speed.
Threshold adjustment
adjusting
screw

B0040

3 mm

4. Adjust PWM signal to current calculated from the H1B 060/080/110/160/210/250 Technical Information(BC152886483576) document in the corresponding control section. Note the flow reading.
5. If adjustment is necessary, remove cap (B0040). Using a 3mm internal hex wrench, turn adjustingscrew clockwise or counterclockwise until flow starts to change from maximum.
One full turn of the adjusting screw changes the threshold by approximately 48 mA for 12V controls
and 24mA for 24V controls. CW turn decreases the setting and CCW turn increases the setting. Test
your adjustment by lowering the current, then increasing the current until the displacement starts tochange. Readjust the setting if necessary.
6. When threshold is adjusted correctly, stop prime mover, install cap (B0040), and install motor on
vehicle. Run vehicle and test for proper motor operation.
Adjusting threshold on a machine or test stand without flow meter
1. Install 600 bar [10,000 psi] gauges to ports M5 and M4. Connect solenoid to PWM signal.
2. Raise wheels off ground, or disconnect the work function.

W Warning
Unintended movement of the machine or mechanism may cause injury to the technician or
bystanders. To protect against unintended movement, secure the machine or disable/disconnect themechanism while servicing.
3. Run prime mover at operating speed. Stroke the pump to get some rotation of motor shaft.
4. Increase signal current until M4 pressure becomes 1/2 of the M5 pressure. Check the signal current at
this point.
5. If adjustment is necessary, remove cap (B0040). Turn the adjusting screw until the signal current
matches the model code setting.
6. When threshold is adjusted correctly, stop prime mover, install cap. Run vehicle and test for proper
motor operation.
7. Remove from test stand.

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Adjustments
Optional threshold adjustment – Hydraulic proportional controls
Adjusting threshold on test stand1. Connect flow meter to A or B system port. Refer to Ports and Gauge Information on page 27 for port
locations.
2. Connect a variable pressure supply to X1 port (0-50 bar).
Threshold is the pressure at which the motor starts to change from maximum to minimum
displacement.
3. Run prime mover at operating speed.
Threshold adjustment
adjusting
screw

B0040

3 mm

4. Adjust control pressure to pressure listed in model code. Note flow reading.
5. If adjustment is necessary, remove nut (B0180). Using a 6mm internal hex wrench, turn adjustingscrew clockwise or counterclockwise until flow starts to change from maximum.
One full turn of the adjusting screw changes the threshold by approximately 2.3 bar. CW turnincreases the setting and CCW turn decreases the setting. Test your adjustment by lowering thecontrol pressure, then increasing the control pressure until the displacement starts to change.
Readjust the setting if necessary.
6. When threshold is adjusted correctly, stop prime mover, install nut (B0180), and install motor on
vehicle. Run vehicle and test for proper motor operation.
Adjusting threshold on a machine or test stand without flow meter
1. Install 600 bar [10,000 psi] gauges to ports M5 and M4. Connect a variable pressure supply to X1 port
(0-50 bar).
2. Raise wheels off ground, or disconnect the work function.

W Warning
Unintended movement of the machine or mechanism may cause injury to the technician or
bystanders. To protect against unintended movement, secure the machine or disable/disconnect themechanism while servicing.
3. Run prime mover at operating speed. Stroke the pump to get some rotation of motor shaft.
4. Increase X1 pressure until M4 pressure becomes 1/2 of the M5 pressure. Check the X1 pressure at thispoint.
5. If adjustment is necessary, remove nut (B0180). Turn the adjusting screw until the X1 pressure
matches the model code setting.
6. When threshold is adjusted correctly, stop prime mover, install nut (B0180). Run vehicle and test for
proper motor operation.
7. Remove from test stand.
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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Adjustments
Pressure Compensator OverRide (PCOR) adjustment
PCOR adjustment for all controls except P1/P2 controls is described below. PCOR adjustment for P1/P2
controls is electrically adjusted using a proportional solenoid.
Nominal settings 240 bar [3500 psi] at 800 mA (12 V), 400 mA (24 V) or per model code.
No adjustment is available for the Brake Pressure Defeat (BPD) option. Coil is either energized or deenergized, if coil is used.

W Warning
Unintended movement of the machine or mechanism may cause injury to the technician or bystanders.
To protect against unintended movement, secure the machine or disable/disconnect the mechanism
while servicing.
Setup
1. Install motor in machine.
2. Install 600 bar pressure gauge at system port MA or MB (whichever side is regulated by the PCOR).
Optionally, the gauge can be installed in the system gauge port M5.
3. Install sensor to read engine speed.
4. Install sensor to read wheel speed.
5. Install data acquisition device which is able to record data over time using the sensors installed insteps 2 – 4 above.
6. Deactivate any inching systems connected to the brakes if applicable.
7. Prepare site for testing (two options are available).
a) Lift machine so wheels are no longer engaging the ground, orb) Use a straight, flat surface to drive machine during testing.
Testing
1. Start machine engine.
2. Set engine to high idle (rated speed) and maintain for the duration of the testing.
3. Turn the machine wheels at a constant speed (motor will be at minimum displacement).
a) Allow wheels to turn at constant speed if using setup 7a.
b) Drive machine at constant speed if using setup 7b.
4. Begin data acquisition (system pressure, engine speed, and wheel speed).
5. Slowly apply the service brake to continuously increase the load on the system until the wheel speed(setup 7a) or driving speed (setup 7b) decreases by approximately 1/3.
6. Stop machine and turn off engine.
7. Stop data acquisition.

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Adjustments
Analysis
1. Using appropriate software for the data acquisition device, plot the system pressure, wheel speed
and engine speed versus time.
2. As the system pressure increases (from applying the brakes), the engine speed and wheel speed will
start decreasing.
3. When the system pressure stops rising and remains constant, that pressure will be the PCOR setting.
The engine speed should remain constant during this period while the wheel speed continues todecrease. See Graph below.
Adjustment
1. If adjustment is required, use a 3mm internal hex to hold the PCOR adjusting screw in place and use a
10mm wrench to loosen the PCOR lock nut. One full turn of the adjusting screw changes the PCOR
setting by approximately 90 Bar.
a) Turn adjusting screw clockwise to increase the PCOR setting.
b) Turn adjusting screw counterclockwise to decrease the PCOR setting.
Locknut

10 mm

Adjusting screw

3 mm

2. Use a 3mm internal hex to hold the PCOR adjusting screw in place and use a 10mm wrench to tighten
the lock nut to 8 N-m [6 lbf-ft].

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Adjustments
3. Repeat Testing, Analysis, and Adjustment steps as necessary to reach the desired PCOR setting.

H1B PCOR Adjustment
PCOR Setting
Engine Speed

Wheel Speed

Begin Application ofService Brake

System Pressure
Displacement Range
Minimum Displacement

Max Displacement

TIME

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Shaft seal
Removal1. 1. Using snap ring pliers, remove retaining ring (G0030).
2. 2. Use a slide-hammer style puller to remove seal (G0020). Be careful not to damage the shaft or seal
bore when removing. Discard seal.
Inspection
Inspect retaining ring for wear or damage. Replace if necessary. Inspect shaft for wear or groove at seal
area.
Assembly
1. Lubricate inside diameter of new seal. Cover the shaft splines with shaft cover or packing tape to
avoid damaging the seal during installation.
2. Using seal installation tool, press seal into housing bore.
3. Using a snap ring pliers, install retaining ring (G0030).
4. Use seal installation tool to press seal and retaining ring into housing until retaining ring snaps into
its groove.
If not using seal installation tool: Do not press seal beyond snap-ring groove. Stop pressing just when
you have room to install the retaining ring into the bore. Pressing the seal and snap-ring together
ensures proper installation depth. Using the seal installation tool prevents pressing the seal too
deeply.
Shaft seal

G0020

G0030

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
110/160/210/250 - Seal installation tool dimensions, 060/080 - Seal installation tool dimensions
100 mm
[3.94 in]180 mm
[7.09 in]

150 mm
100 mm [5.90 in][3.94 in]

69 mm 58 mm[2.6 in] [2.3 in]

82 mm[3.15 in]

56 mm 48 mm[2.2 in] [1.9 in]

70 mm[2.76 in]45°

45°
+ 0.105.15 mm - 0.0[0.20 in + -0.004
0.0 ]

42 | © Danfoss | July 2024

5 mm
[0.2 in]+ 0.10P107 738E

5.4 mm - 0.0[0.21 in + -0.004
0.0 ]

5 mm
[0.2 in]

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Electric proportional solenoid replacement
Removal
1. Disconnect electrical connection and remove three cap screws (B0050) using a 4 mm internal hex
wrench.
2. Remove the solenoid (B0010) and O-ring (B0035A). Discard the O-ring.
3. Remove valve spool (C0100).
Inspection
Clean and inspect valve spool and all machined surfaces for damage or wear. Replace parts if necessary.
Assembly
1. Lubricate and install valve spool (C0100).
2. Using petroleum jelly, lubricate and install new O-ring (B0035A).
3. Install cap screws (B0050) using a 4 mm internal hex wrench. Torque screws to 6 N•m [4 lbf•ft].
4. Reconnect electrical connections and test the motor for proper operation.
Replacing solenoid
B0050
B0010

4 mm
6 N•m [ 4 lbf•ft]

B0035A

C0100© Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Hydraulic proportional actuator replacement
Removal
1. Remove three cap screws (B0050) using a 4 mm internal hex wrench.
2. Remove the actuator (B0010).
Inspection
Clean and inspect all machined surfaces for damage or wear. Replace parts if necessary.
Assembly
Replacing actuator

B0050

B0010

P108828

1. Install cap screws (B0050) using a 4 mm internal hex wrench and torque screws to 6 N•m [4 lbf•ft].
2. Test the motor for proper operation.

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Control module replacement
Removal
1. Remove four cap screws (C0110 and/or C0120). Refer to table for wrench sizes.
2. Remove control (C0010) from motor. Remove and discard gasket (C0130).
3. Proportional control only - using a magnet, remove spring seat (F0030) and spring (F0040).
Inspection
Clean and inspect the machined surfaces on the control and the endcap. If you find any nicks or
scratches, replace control or endcap. Inspect valve spool, washer, and spring. Replace if necessary.
Assembly
Control module removal/installation

C0120 (2X)
10 mm

C0110 (4X)
6 mm
C0010
Proportional
control
F0030

F0040

115 Nm[85 lbf•ft]

37 Nm[27 lbf•ft]

C0010
2 position
control

C0110 (4X)
6 mm
C0110 (2X)
10 mm

37 Nm
[27 lbf•ft]

C0010
Proportional
control

115 Nm [85 lbf•ft]

F0030

F0040
C0130
C0130

C0130

Electric proportional control© Danfoss | July 2024

Two position control

Hydraulic proportional control

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
1. Lubricate and install spring (F0040) and spring seat (F0030) into servo.
2. Install a new gasket (C0130).
3. Position control on motor.
4. Install four cap screws (C0110 and/or C0120).
C0110 and C0120 Wrench Size

46 | © Danfoss | July 2024

Screw

Control

TorqueInternal Hex
Wrench

C0110

Electric / Hydraulic proportional

37 N•m[27 lbf•ft]

6 mm

C0110, C0120

Two-position

115 N•m[85 lbf•ft]

10 mm

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Electric proportional control module
Coil O-rings are not included in the overhaul seal kit. They may be purchased as a separate kit.
Disassembly
1. Remove the plastic cap (B0040) and O-ring (B0029). Discard the O-ring.
2. Remove the solenoid nut (B0027) using a 26mm 12-point socket. Remove and discard the O-ring(B0028).
3. Remove the coil (B0020A). Remove and discard the O-ring (B0025).
4. Use a 4 mm internal hex wrench to remove screws (B0050). Remove solenoid (B0010).
5. Remove and discard O-ring (B0035A).
6. Remove spool (C0100).
7. Using a 1/4 in internal hex wrench remove plug (C0050) and discard O-ring (C0050A).
8. Use a 5 mm internal hex to remove shuttle valve (C0025).
9. Using a 1/8 in internal hex wrench, remove 3 plugs (C0060) and discard O-rings (C0060A).
10. Using a 3 mm internal hex, remove 2 orifices (E00T3 and E00T2).
Inspection
Inspect the machined surfaces on the control and the endcap. If you find any nicks or scratches, replace
the control or endcap assembly. Check that shuttle ball moves freely in housing (C0025).

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Assembly
Proportional control block assembly
B0027
26 mm

B0040

3.5 N•m[2.6 lbf•ft]

B0029
B0027
B0028

B0020A

B0020

B0050
4mm
6 N•m
[4 lbf•ft]

1/4 inC0050
40 N•m C0050A[30 lbf•ft]

8 N•m[6 lbf•ft]
1/8 in
C0060
C0060A

B0025

B0035A

B0010

6 N•m [4 lbf•ft]
3 mm
E00T2
C0100

C0025
5 mm
8 N•m
[6 lbf•ft]

B0010
C0060AC0060
1/8 in8 N•m[6 lbf•ft]

3 mm
6 N•m [4 lbf•ft]

E00T3
C0060AC0060
1/8 in8 N•m[6 lbf•ft]

1. Install orifices (E00T3 and E00T2) with torque to 6 N•m [4 lbf•ft].
2. Lubricate and install new O-rings (C0060A).
3. Install and torque plugs (C0060) to 8 N•m [6 lbf•ft] using a 1/8 inch internal hex wrench.
4. Lubricate and install spool (C0025) into control block using a 5 mm internal hex wrench, torque to 14N•m [11 lbf•ft]
5. Install new O-ring (C0050A).
6. Install and torque plug (C0050), check torque tables
7. Lubricate and install spool (C0100).
8. Lubricate and install new O-ring (B035A).
9. Install solenoid (B0010) using a 4 mm internal hex wrench.
10. Install screws (B0050) with torque to 6 N•m [4 lbf•ft].
11. Lubricate and install new O-ring (B0025) onto solenoid.
12. Install coil (B0020A).

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
13. Lubricate and install new O-ring (B0028) onto solenoid.
14. Install coil nut (B0027) and torque to 3.5 N•m [2.6 lbf•ft] using a 26 mm 12-point socket.
Do not over torque.
15. Install new O-ring (B0029) and plastic cap (B0040) to solenoid.

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Hydraulic proportional control module
Disassembly
1. Use a 4 mm internal hex wrench to remove screws (B0050). Remove actuator (B0010).
2. Remove and discard O-ring (B0035A).
3. Using an internal hex wrench remove plug (C0050) and discard O-ring (C0050A).
4. Use a 5 mm internal hex to remove shuttle valve (C0025).
5. Using a 1/8 in internal hex wrench, remove 3 plugs (C0060) and discard O-rings (C0060A).
6. Using a 3 mm internal hex, remove 2 orifices (E00T3 and E00T2).
Inspection
Inspect the machined surfaces on the control and the endcap. If you find any nicks or scratches, replace
the control or endcap assembly. Check that shuttle ball moves freely in housing (C0025).
Assembly
C0090
C0090A
C0080
C0070
E00T2
1/8 in8 N•m[6 lbf•ft] C0060

6 N•m [4 lbf•ft]
3 mm

C0140

C0060

C0060A
C0010

C0060A

8 N•m[6 lbf•ft]

C0050
C0050A
C0060
C0060

C0060

C0060A
C0060A

C0050A C0050

C0060A
C0060A

C0060

C0120
C0110

0010
0020

C0060A

C0100

6 N•m [4 lbf•ft]
3 mm
C0060A C0060
1/8 in8 N•m[6 lbf•ft]

E00T3

C0060

C0060AC0060
1/8 in8 N•m[6 lbf•ft]

C0020

C0140
C0050A
C0050
40 N•m[30 lbf•ft]

B0190

B0061
B0060

B0010
0020

B0180

0010

DHMH

B0050

P108832

1. Install orifices (E00T3 and E00T2) with torque to 6 N•m [4 lbf•ft].
2. Lubricate and install new O-rings (C0060A).
3. Install and torque plugs (C0060) to 8 N•m [6 lbf•ft] using a 1/8 inch internal hex wrench.
4. Lubricate and install spool (C0025) into control block using a 5 mm internal hex wrench, torque to 14N•m [11 lbf•ft]
5. Install new O-ring (C0050A).

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
6. Install and torque plug (C0050), check torque tables.
7. Install actuator (B0010) using a 4 mm internal hex wrench.
8. Install screws (B0050) with torque to 6 N•m [4 lbf•ft].
If replacing the hydraulic actuator, set the threshold pressure to the proper setting. Refer to Adjusting
threshold on test stand on page 37© Danfoss | July 2024

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Electric two-position control module
Coil O-rings are not included in the overhaul seal kit. They are included with the purchase of a new coil.
Disassembly
1. Use a 26 mm 12-point socket to remove coil nuts (B0026) and O-ring (B0028).
2. Remove coils (B0022) and O-rings (B0024). Discard O-rings.
3. Using a 17 mm open-end wrench on the flats provided, remove solenoid assemblies (B0032).
4. Remove and discard O-rings (B0034).
5. Using a 1/8 inch internal hex wrench, remove four plugs (C0060). Remove and discard O-rings(C0060A).
6. Using an internal hex wrench, remove two plugs (C0050). Remove and discard O-rings (C0050A).
7. Using a 17 mm hex wrench, remove pressure compensator adjusting plug (C0090). Remove anddiscard O-ring (M223).
8. Remove springs (C0030) and (C0080). Remove spools (C0020) and (C0070).
9. If necessary, use a 3 mm internal hex wrench to remove orifices (E00T2) and (E00T3).
Inspection
Clean and inspect the machined surfaces on the control and the endcap. If any nicks or scratches arefound, replace the control/endcap assembly.

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Assembly
Two-position control assembly
B0028
B0022

B0026
3.5 N•m[2.6 lbf•ft]

T*D* and P*D*

B0024
17 mm
25 N•m [19 lbf•ft]

B0032

B0034

B0026
3.5 N•m[2.6 lbf•ft] B0028

1/4 in40 N•m [30 lbf•ft]

B0024

C0050
B0022
C0050A
B0032
17 mm
25 N•m [19 lbf•ft]

C0060

1/8 in 8 N•m [6 lbf•ft]

B0034
C0060AC0060
1/8 in8 N•m [6 lbf•ft]
C0060AC0060
1/8 in8 N•m [6 lbf•ft] E00T3
3 mm
6 N•m
[4 lbf•ft]

B0026
B0028
B0022
B0024
C0050

C0050
B0032

C0060A
1/8 in 8 N•m [6 lbf•ft]

C0060

C0070
C0080

M223

C0090
C0020
17 mm
E00T2
25 N•m
3 mm
C0030[18 lbf•ft]
6 N•m
C0050A[4 lbf•ft]
C0050
1/4 in40 N•m [30 lbf•ft]

T*G* and P*G*

B0034

C0030
C0010

C0020
C0060

C0060

C0070
C0080

E00T3

M223
C0090

E00T2
B0034
B0032
B0024
B0022
B0028
B0026

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
1. If previously removed, install orifices (E00T3 and E00T2) using a 3 mm internal hex wrench. Torque to
6 N•m [4 lbf•ft].
2. Lubricate and install spools (C0020) and (C0070) and springs (C0080) and (C0030).
3. Lubricate and install O-ring (M223). Install pressure compensator adjusting plug (C0090). Torque to
25 N•m [18 lbf•ft].
4. Lubricate and install two O-rings (C0050A). Using an internal hex wrench, install plugs (C0050).
5. Lubricate and install four O-rings (C0060A). Using a 1/8 inch internal hex wrench, install plugs(C0060). Torque to 8 N•m [6 lbf•ft].
6. Lubricate and install O-rings (B0034).
7. Install solenoids (B0032) using a 17 mm open-end wrench on the flats provided. Torque to 25 N•m [19lbf•ft] .
8. Lubricate and install new O-rings (B0024) on solenoids.
9. Install coils (B0022).
10. Lubricate and install new O-rings (B0028).
11. Install coil nuts (B0026) using a 26 mm 12-point socket. Torque to 3.5 N•m [2.6 lbf•ft].
Do not over torque.

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Hydraulic two-position control module
Disassembly
1. Using a 1/8 inch internal hex wrench, remove plug (C0160). Remove and discard O-ring (C0160A).
2. Using a 1/8 inch internal hex wrench, remove three plugs (C0060). Remove and discard O-rings(C0060A).
3. Using an internal hex wrench, remove two plugs (C0050). Remove and discard O-rings (C0050A).
4. Use a 5mm internal hex wrench to remove the shuttle valve (C0025).
5. Using a 3/8 internal hex wrench, remove plug (C0140). Remove and discard O-ring (C0140A).
6. Remove spring (C0080). Remove spool (C0150).
7. If necessary, use a 3 mm internal hex wrench to remove orifices (E00T2) and (E00T3).
Inspection
Clean and inspect the machined surfaces on the control and the endcap. If any nicks or scratches arefound, replace the control/endcap assembly.
Assembly
Hydraulic two-position control assembly (HEHE, HFHF)
C0140

C0160
C0160A

3/8 inch

C0050

HEHE
C0080
C0150

C0060
C0060

C0050
C0025

C0050

C0060
C0140

C0060
1/8 in

C0160
C0160A

3/8 inch

C0050
C0080
C0150

C0060
C0060

C0060

C0050

C0060
1/8 in

1/8 in

HFHF

C0050
C0025
P108 576E

1. Lubricate and install spool (C0150) and spring (C0080).
2. Using a 3/8 inch internal hex wrench, install plug (C0140). Torque to 25 N•m [18 lbf•ft].
3. Lubricate and install spool (C0025).
4. Using an internal hex wrench, install two plugs (C0050).
5. Using a 1/8 inch internal hex wrench, install four plugs (C0060). Torque to 8 N•m [6 lbf•ft].
6. Using a 1/8 inch internal hex wrench, install plug (C0160). Torque to 25 N•m [18 lbf•ft].

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Hydraulic two-position control module with PCOR
Disassembly
1. Using a 1/8 inch internal hex wrench, remove two plugs (C0060). Remove and discard O-rings(C0060A).
2. Using an internal hex wrench, remove three plugs (C0050). Remove and discard Orings (C0050A).
3. Use a 5mm internal hex wrench to remove the shuttle valve (C0025).
4. Using a 22 mm hex wrench, remove adapter (B0300). Remove and discard O-ring (QB0300).
5. Using a 17 mm hex wrench, remove pressure compensator adjusting plug (C0090). Remove anddiscard O-ring (M223).
6. Remove spring (C0080). Remove spool (C0070).
7. If necessary, use a 3 mm internal hex wrench to remove orifices (E00T2) and (E00T3).
Inspection
Clean and inspect the machined surfaces on the control and the endcap. If any nicks or scratches arefound, replace the control/endcap assembly.
Assembly
Two-position control assembly (THHA)
B0300

C0050
C0050

C0025

B0310
QB300
B0330
B0320

C0060
1/8 in

E00T3

C0050

THHA

C0070
C0060
1/8 in

C0080

E00T2

M223
C0090

P108913

1. If previously removed, install orifices (E00T3 and E00T2) using a 3 mm internal hex wrench withtorque to 6 N•m [4 lbf•ft].
2. Lubricate and install spool and (C0070) and spring (C0080).
3. Lubricate and install O-ring (M223).
4. Install pressure compensator adjusting plug (C0090) with torque to 25 N•m [15 lbf•ft].
5. Lubricate and install O-ring (QB0300).
6. Install adapter (B0300) with torque to 67 N•m [49 lbf•ft].
7. Lubricate and install spool (C0025).
8. Install three plugs (C0050) using an internal hex wrench, check torque tables.
9. Install two plugs (C0060) using a 1/8 inch internal hex wrench, with torque to 8 N•m [6 lbf•ft].

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Hydraulic two-position control module with PCOR and hydraulic BPD
Disassembly
1. Using a 1/8 inch internal hex wrench, remove three plugs (C0060). Remove and discard O-rings(C0060A).
2. Using an internal hex wrench, remove four plugs (C0050). Remove and discard O-rings (C0050A).
3. Using a 1/4 inch internal hex, remove plug (C0140). Remove spool (C0020).
4. Use a 5mm internal hex wrench to remove the shuttle valve (C0025).
5. Using a 22 mm hex wrench, remove adapter (B0300). Remove and discard O-ring (QB0300).
6. Using a 17 mm hex wrench, remove pressure compensator adjusting plug (C0090). Remove anddiscard O-ring (M223).
7. Remove spring (C0080). Remove spool (C0070).
8. If necessary, use a 3 mm internal hex wrench to remove orifices (E00T2) and (E00T3).
Inspection
Clean and inspect the machined surfaces on the control and the endcap. If any nicks or scratches arefound, replace the control/endcap assembly.
Assembly
Two-position control assembly (THHB)
B0300

C0050
C0050

C0025

B0310
QB300
B0330
B0320

THHB

C0050

C0070
C0060
1/8 in

E00T3

C0080

C0060
1/8 in

E00T2

M223
C0090

C0020
C0140

C0050
P108923

1. If previously removed, install orifices (E00T3 and E00T2) using a 3mm internal hex wrench. Torque to
6 N•m [4 lbf•ft].
2. Lubricate and install spools and (C0070) and spring (C0080).
3. Lubricate and install O-ring (M223).
4. Install pressure compensator adjusting plug (C0090). Torque to 25 N•m [18 lbf•ft].
5. Lubricate and install O-ring (QB0300).
6. Install adapter (B0300). Torque to 67 N•m [49 lbf•ft].
7. Lubricate and install spool (C0020).
8. Using a 1/4 inch internal hex wrench, install plug (C0140). Torque to 14 N•m [10 lbf•ft].

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
9. Lubricate and install shuttle (C0025).
10. Using an internal hex wrench, install four plugs (C0050), check torque tables.
11. Using a 1/8 inch internal hex wrench, install three plugs (C0060). Torque to 8 N•m [6 lbf•ft].

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Maximum displacement limiter two-position controls
It is not necessary to remove the maximum displacement limiter unless it is being replaced.
Disassembly
Models with maximum displacement limiter: Remove screw (P0100) using a 6 mm internal hex, andspacer (P0200).
Assembly
Maximum displacement limiter assembly
P0100
6 mm
P0200

P107 866E

1. Install spacer (P0200) and screw (P0100) using a 6 mm internal hex.
2. Torque screw to 37 N•m [28 lbf•ft].

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Servo piston cover – proportional control
RemovalO-ring(P0043)

P0041
P0043

Seal ring(P0044)

Piston

P0040

P0044

P0050

see table

P0030
P0010
10 mm
115 N•m [85 lbf•ft]
P0020

1. Remove four screws (P0020) using a 10 mm internal hex wrench.
2. Remove servo piston cover (P0010).
3. Remove and discard O-ring (P0030).
4. Remove screw (P0050).

C Caution
For the safe removal of end cap and servo piston, please refer to the H1B Bent Axis Variable Motor
Repair Instructions available to Authorized Service Centers.

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
5. Using expanding pliers, remove piston head (P0040).

Servo
pistonhead

Expandingpliers

6. Remove and discard seal ring (P0044) and O-ring (P0043).
Inspection
Clean and inspect bushings and machined surfaces for wear or damage. If wear or damage are found,replace component in question.
Assembly
1. Lubricate and install new O-ring (P0043) and seal ring (P0044) on piston (P0041).
O-ring(P0043)

Seal ring(P0044)

Piston head

Allow seals time to relax before installing piston.
2. Install piston and install screw (P0050).
See the table for wrench size below:
Wrench size (internal hex)

© Danfoss | July 2024

Size

060/080110

160/210/250

Wrench size

8 mm

10 mm

12 mm

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Torque for P0050
Size

060/080110

160/210/250

Torque66 N•m [49 lbf•ft]

115 N•m [85 lbf•ft]

213 N•m [157 lbf•ft]

3. Lubricate and install new O-ring (P0030) and install servo piston cover (P0010).
4. Using a 8 mm or 10 mm internal hex install screws (P0020). Torque to 115 N•m [85 lbf•ft].
Refer to the H1B Bent Axis Variable Motor Repair Instructions (available to Authorized Service Centers)
if further motor disassembly is needed.

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Replace speed sensor
Removal
1. Using a 5 mm internal hex wrench, remove screw (J0020).
2. Remove speed sensor (J0010).
3. Discard O-ring (J0010A).
Assembly
Speed sensor assembly
J0020
5 mm
8 N•m [6 lbf•ft]
J0010
J0010A

1. Lubricate and install new O-ring (J0010A).
2. Install speed sensor (J0010).
3. Install screw (J0020) using a 5 mm internal hex wrench with torque to 8 N•m [6 lbf•ft].

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Loop flushing spool
Removal
1. Remove plugs (K0030) using a 24 mm hex wrench.
2. Remove and discard O-rings (K0030A).
3. Use a magnet to remove springs (K0020) and spool (K0010).
Inspection
Clean and inspect spool (K0010). If spool is damaged or worn replace it. Replace springs if they arecracked or bent.
Reassembly
Loop flushing reassembly
K0030

24 mm
67 N•m [49 lbf•ft]

K0020

K0030A

K0030

24 mm
67 N•m[49 lbf•ft]

K0010
K0020
K0030A

1. Lubricate and install spool (K0010).
2. Lubricate and install springs (K0020).
3. Lubricate and install new O-rings (K0030A).
4. Install plugs (K0030) using a 24 mm hex wrench with torque to 67 N•m [49 lbf•ft].

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Loop flushing charge relief valve
Removal
1. Using a 24 mm hex wrench remove valve (L00**)
2. Remove and discard O-ring (L0050).
Do not disassemble valve. If you suspect malfunction, replace valve.
Assembly
1. Install new O-ring (L0050).
2. Using a 24 mm hex wrench, install valve (L00**). Torque to 67 N•m [49 lbf•ft].
Loop flushing charge relief valve replacement

L0050

L00**

© Danfoss | July 2024

24 mm
67 N•m [49 lbf•ft]

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Minor repair
Minimum Displacement limiter
Removal
1. Remove cap (N0120).
Removing the cap destroys the caps locking mechanism. Replace with a new cap.
2. While holding the position of the adjustment screw, remove the seal locknut (N0020) using a 19mm
hex wrench. Discard the locknut. After removing the locknut, mark the position of the limiter screw
for reassembly.
3. Using a 6 mm internal hex, remove displacement limiter screw (N0010).
Inspection
Inspect set screw for wear or damage. Replace set screw if necessary.
Assembly
1. Using a 6 mm internal hex wrench, install adjustment screw (N0010) to original position.
2. Using a 6 mm internal hex wrench, to hold the position of the adjustment screw, install a new seal
locknut (N0020) using a 19mm hex wrench. Torque to 45 N•m [32 lbf•ft].
3. Install new cap (N0120).
Displacement limiter assembly

N0010

19 mm
45 N•m[32 lb•ft]
N0020

66 | © Danfoss | July 2024

6 mm

N0120

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Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Torque chart
Fasteners, plugs with torque chart
Proportional controls port, plug and fasteners (with radial ported endcap)
P0020
L00**

M4
F0100
SystemPort B

L1
G0060

MA
F0150

J0020

M5
F0100
SystemPort A

MB
F0150

K0030
XA
B0060

B0060
XB

X1
B0060

C0060
G0050

B0050

C0110 and C0120

G0060
L2

N0010

N0020

Two-position controls port, plug and fasteners (with radial ported endcap)
XA
B0060

SystemPort A

XB
B0060

X1
B0060

M4
F0100

MB
F0150

L1
M5 G0060
F0100

K0030

MA
F0150

SystemPort B

L00**

G0060
L2

Fastener size and torque chart
Item

Fastener

Wrench size

Torque

B0050

Solenoid screws

4 mm internal hex

6 N•m [4 lbf•ft]

C0110

Control (proportional) assembly screws

6 mm internal hex

37 N•m [28 lbf•ft]

C0110, C0120

Control (two-position) assembly screws

10 mm internal hex

115 N•m [85 lbf•ft]

J0020

Speed sensor screw

5 mm internal hex

8 N•m [6 lbf•ft]

N1000

Displacement limiter screw

6 mm internal hex

N/A

N2000

Displacement limiter lock-nut

19 mm

45 N•m [32 lbf•ft]

P0020

Servo piston cover screws

10 mm internal hex

115 N•m [85 lbf•ft]

Plug size and torque chart - Inch version© Danfoss | July 2024

Item

O-ring plug

Wrench size

TorqueB0060

9/16 - 18UNF

1/4 internal hex

40 N•m [30 lbf•ft]

C0050

9/16-18 UNF (not shown)

1/4 internal hex

40 N•m [30 lbf•ft]

C0060

5/16 - 24UNF

3/8 internal hex

8 N•m [5 lbf•ft]

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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Torque chart
Plug size and torque chart - Inch version (continued)
Item

O-ring plug

Wrench size

TorqueF0100

9/16 - 18UNF

1/4 internal hex

40 N•m [30 lbf•ft]

F0150 (080, 110,
160, 210, 250)

1-1/16 - 12 UN (Radial endcap)

9/16 internal hex

115 N•m [85 lbf•ft]

G0050

5/16 - 24UNF (SAE and DIN flange)

1/8 internal hex

8 N•m [5 lbf•ft]

G0055

7/16 - 20UNF (Cartridge only/not shown)

3/16 internal hex

8 N•m [5 lbf•ft]

G0060 (060, 080)

7/8 - 14UN

3/8 internal hex

70 N•m [52 lbf•lb]

G0060 (110, 160)

1-1/16 - 12UN

9/16 internal hex

70 N•m [52 lbf•lb]

G0060 (210, 250)

1-5/16 - 12UN

5/8 internal hex

70 N•m [52 lbf•lb]

K0030

M18 - 1.5

24 mm hex

67 N•m [49 lbf•ft]

L00**

M18 - 1.5

24 mm hex

67 N•m [49 lbf•ft]

F0160, C0050 and
B0060

9/16-18 UNF

1/4 internal hex

40 N•m [30 lbf•ft]

95 N•m [70 lbf•ft]

F0150 (060)

Plug size and torque chart - Metric version

68 | © Danfoss | July 2024

Item

O-ring plug

Wrench size

TorqueB0060

9/16 - 18UNF

1/4 internal hex

40 N•m [30 lbf•ft]

C0050

9/16-18 UNF (not shown)

1/4 internal hex

40 N•m [30 lbf•ft]

C0060

5/16 - 24UNF

3/8 internal hex

8 N•m [5 lbf•ft]

F0100

M14x1.56mm internal hex

47 N•m [35 lbf•ft]

F0150 (060)M22x1.510mm internal hex

105 N•m [77 lbf•ft]

F0150 (080, 110,
160, 210, 250)

M27x2 (Radial endcap)

G0050

5/16 - 24UNF (SAE and DIN flange)

1/8 internal hex

8 N•m [5 lbf•ft]

G0055

7/16 - 20UNF (Cartridge only/not shown)

3/16 internal hex

8 N•m [5 lbf•ft]

G0060 (060, 080)

M22x1.510mm internal hex

70 N•m [52 lbf•lb]

G0060 (110, 160)

M27x2

12mm internal hex

70 N•m [52 lbf•lb]

G0060 (210, 250)

M33x2

14mm internal hex

70 N•m [52 lbf•lb]

K0030

M18 x1.5

24 mm hex

67 N•m [49 lbf•ft]

L00**

M18 x1.5

24 mm hex

67 N•m [49 lbf•ft]

F0160, C0050 and
B0060

M14x1.56mm internal hex

47 N•m [35 lbf•ft]

12mm internal hex

180 N•m [132 lbf•ft]

AX152886484369en-000608

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Cartridge valves
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valvesElectric converters
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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.

Gear motors

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

Gear pumps

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

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circuits (HICs)
Hydrostatic motors

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

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interfaces
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Position controls andsensors
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Local address:

Hydro-Gear
www.hydro-gear.com
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www.daikin-sauer-danfoss.com

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2800 East 13th Street
Ames, IA 50010, USA
Phone: +1 515 239 6000

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Krokamp 35
D-24539 Neumünster, Germany
Phone: +49 4321 871 0

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Phone: +45 7488 2222

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Building #22, No. 1000 Jin Hai Rd
Jin Qiao, Pudong New District
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Phone: +86 21 2080 6201

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

© Danfoss | July 2024

AX152886484369en-000608