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 |
Table of revisions |
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Date |
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Changed |
Rev |
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March 2020 |
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Added adjustment details for threshold settings and changed document number from |
0607 |
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AX00000025 |
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August 2019 |
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Added caution for servo piston removal |
0505 |
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August 2018 |
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update adjustment chapter |
0504 |
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April 2018 |
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Major layout update, QF080 to QM050 updates |
0503 |
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January 2018 |
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update pressure compensator torque values |
0502 |
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July 2016 |
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Add G1, G2 controls |
0501 |
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December 2015 |
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Add 210 frame size |
0500 |
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November 2015 |
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Model code change |
0400 |
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July 2015 |
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correct torque values, pages 61, 62 |
0301 |
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June 2015 |
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add hydraulic controls THHA, THHB |
0300 |
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2008-2015 |
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First edition - and next various changes. |
AA-CB |
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2 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual |
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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc |
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Contents |
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Introduction |
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About this manual............................................................................................................................................................................ |
5 |
Warranty.............................................................................................................................................................................................. |
5 |
General Instructions........................................................................................................................................................................ |
5 |
Safety precautions............................................................................................................................................................................ |
5 |
Symbols used in Danfoss literature............................................................................................................................................ |
7 |
H1 general information |
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Design of H1 bent axis motor...................................................................................................................................................... |
8 |
General description....................................................................................................................................................................... |
10 |
H1 pictorial diagram..................................................................................................................................................................... |
11 |
H1 system schematic.................................................................................................................................................................... |
12 |
Technical specifications |
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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 |
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Shaft rotation direction................................................................................................................................................................ |
19 |
Loop flushing shuttle spool........................................................................................................................................................ |
21 |
Loop flushing relief valve............................................................................................................................................................ |
22 |
Speed sensor................................................................................................................................................................................... |
23 |
Displacement limiter..................................................................................................................................................................... |
23 |
Operating parameters |
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Output speed................................................................................................................................................................................... |
24 |
System pressure............................................................................................................................................................................. |
24 |
Case pressure................................................................................................................................................................................... |
25 |
External shaft seal pressure........................................................................................................................................................ |
25 |
Temperature.................................................................................................................................................................................... |
25 |
Fluid and filter maintenance |
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Fluid and filter recommendations........................................................................................................................................... |
26 |
Pressure measurements |
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Ports and Gauge Information.................................................................................................................................................... |
27 |
Initial startup procedures |
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Procedure.......................................................................................................................................................................................... |
29 |
Troubleshooting |
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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........................................................................................................................................................................ |
33 |
Required tools and standard procedures |
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Adjustments |
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Optional threshold adjustment – Electric proportional controls................................................................................. |
36 |
Optional threshold adjustment – Hydraulic proportional controls............................................................................. |
37 |
Pressure Compensator OverRide (PCOR) adjustment...................................................................................................... |
38 |
Minor repair |
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© Danfoss | March 2020 |
AX152886484369en-000607 | 3 |
Service Manual |
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H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc |
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Contents |
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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 |
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Fasteners, plugs with torque chart.......................................................................................................................................... |
67 |
4 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
This 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 enemies of any type of hydraulic equipment, follow cleanliness requirements strictly. This is especially important when 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 partner at www.danfoss.com > Contact us > Danfoss sales and services > Distributor and service partners
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.
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. |
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Prior to performing repairs, remove the unit from the vehicle/machine. Be aware |
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that hydraulic fluid may be under high pressure and/or hot. Inspect the outside of |
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the motor and fittings for damage. Cap hoses after removal to prevent |
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contamination. |
Keep it clean |
Cleanliness is a primary means of assuring satisfactory motor life, on either new or |
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repaired units. Clean the outside of the motor thoroughly before disassembly. |
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Take care to avoid contamination of the system ports. Cleaning parts with a clean |
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solvent wash and air drying is usually adequate. Keep all parts free of foreign |
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materials and chemicals. Protect all exposed sealing surfaces and open cavities |
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from damage and foreign material. |
Lubricate moving |
During assembly, coat all moving parts with a film of clean hydraulic oil. This |
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assures that these parts are lubricated during start-up. |
Replace all O-rings |
Danfoss recommends you replace all O-rings and gaskets during repair. Lightly |
and gaskets |
lubricate O-rings with clean petroleum jelly prior to assembly. |
Secure the unit |
For repair, place the unit in a stable position with the shaft pointing downward. |
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Secure the motor while removing and torquing components and fasteners. |
Always consider safety precautions before beginning a service procedure. Protect yourself and others from injury. Take the following general precautions whenever servicing a hydraulic system.
© Danfoss | March 2020 |
AX152886484369en-000607 | 5 |
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 with hydraulic fluid under pressure. Relieve pressure in the system before removing hoses, fittings, gauges, or components. 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.
6 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Introduction
WARNING may result in injury
CAUTION may result in damage to product or property
Reusable part
Non-reusable part, use a new part
Non-removable item
Option - either part may exist
Superseded - parts are not interchangeable
Measurement required
Flatness specification
Parallelism specification
External hex head
Internal hex head
Torx head
O-ring boss port
Tip, helpful suggestion
Lubricate with hydraulic fluid
Apply grease / petroleum jelly
Apply locking compound
Inspect for wear or damage
Clean area or part
Be careful not to scratch or damage Note correct orientation
Mark orientation for reinstallation
Torque specification
Press in - press fit
Pull out with tool – press fit
Cover splines with installation sleeve
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 appearance of the symbol itself denotes its meaning. The legend above defines each symbol and explains its purpose.
© Danfoss | March 2020 |
AX152886484369en-000607 | 7 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Cross-section of H1 motor with electric proportional control
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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)
10 |
9
P005 917
8 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual
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
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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 | March 2020 |
AX152886484369en-000607 | 9 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
H1 general information
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 to transfer 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 of applications.
Motors normally start at maximum displacement. This provides maximum starting torque for high acceleration.
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 to disable 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 for easy "Plug and Perform" installation.
10 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
H1 general information
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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 |
10. Charge Pressure Filter |
2. Axial Piston Variable Displacement Pump |
11. Heat Exchanger |
3. Electric Displacement Control (EDC) |
12. Heat Exchanger Bypass Valve |
4. Charge Pump |
13. Valve Segment |
5. Charge Check / High Pressure Relief Valve |
14. Pump Swashplate |
6. Loop Flushing Valve |
15. Input Shaft |
7. Pressure Limiter Valve |
16. Output Shaft |
8. Charge Pressure Relief Valve |
17. Reservoir |
9. Servo Cylinder |
18. to Motor Case |
© Danfoss | March 2020 |
AX152886484369en-000607 | 11 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
H1 general information
System schematic H1 pump and H1 motor with EDC
M14 |
M6 |
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R1 |
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<![if ! IE]> <![endif]>R2 |
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C2 |
C1 |
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M3 L1 |
L2 MA |
L2 |
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MA |
N |
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F00B |
F00A |
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A |
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M5 |
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CW |
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max. |
min. |
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L1 |
M4 |
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B |
B |
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S L3 |
L4 |
MB |
M4 |
M5 |
MB |
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max. 3 bar |
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[43.5 psi] |
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P003 424 |
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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*) and integrated loop flushing device.
12 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
General specifications
Design |
Piston motor with variable displacement bent axis design |
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Direction of rotation |
Bi-directional |
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Pipe connections |
Main pressure ports: ISO split flange boss |
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Remaining ports: SAE straight thread O-ring boss |
Recommended installation |
Discretionary, the housing must always be filled with hydraulic fluid |
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Physical properties
Features |
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Unit |
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Size |
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060 |
080 |
110 |
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160 |
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210 |
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250 |
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Displacement |
maximum |
cm3 [in3] |
60 [3.66] |
80 [4.88] |
110 |
[6.71] |
160 |
[9.76] |
210 |
[12.81] |
250 |
[15.25] |
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minimum |
12 [0.73] |
16 [0.98] |
22 [1.34] |
32 [1.95] |
42 [2.56] |
50 [3.05] |
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Theoretical flow at |
at rated speed |
l/min |
216 [57] |
256 [68] |
319 |
[84] |
416 |
[110] |
504 |
[133] |
550 |
[145] |
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max. displ. |
at max. speed |
[US gal/min] |
270 [71] |
328 [87] |
407 |
[108] |
528 |
[139] |
630 |
[166] |
700 |
[185] |
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Theoretical torque |
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N•m/bar |
0.96 [583] |
1.27 [777] |
1.75 [1069] |
2.55 [1555] |
3.34 [2038] |
3.98 [2426] |
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at max. displacement |
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[lb•in/1000 psi] |
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Theor. corner power at rated speed and max. |
kW [hp] |
266 [357] |
321 [430] |
396 |
[531] |
513 |
[689] |
609 |
[817] |
684 |
[917] |
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working pressure (∆p = 450 bar [6527 psi]) |
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Mass moment of inertia of rotating |
kg•m2 |
0.0038 |
0.0062 |
0.0108 |
0.0211 |
0.0306 |
0.0402 |
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components |
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[slug•ft2] |
[0.0028] |
[0.0046] |
[0.0080] |
[0.0156] |
[0.0226] |
[0.0296] |
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Case volume |
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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] |
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Weight dry (Electric proportional control)
Configuration |
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Size |
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060 |
080 |
110 |
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160 |
210 |
250 |
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SAE |
29.8 kg [65.7 lb] |
34.8 kg [76.7 lb] |
48.8 kg [107.6 lb] |
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61.9 kg [136.5 lb] |
81.0 kg [179 lb] |
87.0 kg [196.2 lb] |
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DIN |
28.3 kg [62.4 lb] |
34.4 kg [75.8 lb] |
45.0 kg [99.2 lb] |
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59.3 kg [130.7 lb] |
75.0 kg [165 lb] |
79.6 kg [175.5 lb] |
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Cartridge |
26.9 kg [59.3 lb] |
33.0 kg [72.6 lb] |
41.8 kg [92.2 lb] |
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54.7 kg [120.6 lb] |
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Mounting flange
Configuration |
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Size |
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060 |
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110 |
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160 |
210 |
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250 |
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SAE ISO 3019/1 |
127-4 |
(SAE C) 4-bolt |
152-4 (SAE-D) 4-bolt |
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165-4 (SAE E) |
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DIN ISO 3019/2, B4 |
125 HL 4-bolt |
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140 HL 4-bolt |
160 HL 4-bolt |
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180 HL 4-bolt |
200 HL 4-bolt |
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200 HL 4-bolt |
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Pilot Ø160 mm |
Pilot Ø190 mm |
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Pilot Ø200 mm |
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Cartridge |
2-bolt (200 dist.) |
2-bolt (224 dist.) |
2-bolt (250 dist.) M20 |
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M16 |
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M20 |
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© Danfoss | March 2020 |
AX152886484369en-000607 | 13 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
Customer ports
Size |
060 |
080 |
110 |
160 |
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210 |
250 |
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Axial and radial1) |
DN19 typ 1 |
DN25 typ 1 |
DN25 typ 1 |
DN32 typ 1 |
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DN32 typ 1 |
DN32 typ 1 |
Case drain ports2) |
0.875 [7∕8]–14UN-2B |
1.0625 [11∕16]–12UN-2B |
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1.313 [15∕16]–12UN-2B] |
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Axial gauge |
0.875 [7∕8]–14UN-2B |
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1.0625 [11∕16]–12UN-2B |
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ports2)3) |
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Radial gauge |
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0.5625 [9∕16]–18UNF-2B |
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port2)3) |
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1)Split flange Boss per ISO6162, 40 MPa series
2)SAE O-ring boss
3)Countersink may be deeper that specified in the standard.
Output Speed
Output Speed |
Displacement |
Unit |
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Size |
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060 |
080 |
110 |
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160 |
210 |
250 |
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Maximum 32° |
|
3600 |
3200 |
2900 |
|
2600 |
2350 |
2200 |
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Rated |
Minimum 6° |
|
5900 |
5300 |
4800 |
|
4250 |
3850 |
3650 |
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Zero 0° |
min-1 |
6600 |
5950 |
5350 |
|
4750 |
4300 |
4050 |
|
Maximum 32° |
(rpm) |
4500 |
4100 |
3700 |
|
3300 |
3000 |
2800 |
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Maximum |
Minimum 6° |
|
7250 |
6600 |
5950 |
|
5250 |
4800 |
4500 |
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Zero 0° |
|
7950 |
7200 |
6500 |
|
5750 |
5250 |
4900 |
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System and Case Pressure, Ambient Temperature
Parameter |
|
All sizes |
|
|
|
System pressure |
Maximum working |
450 bar [6527 psi] |
|
|
|
|
Maximum |
480 bar [6962 psi] |
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Minimum1) |
2) |
Case pressure |
Rated |
3 bar [44 psi] |
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|
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Maximum |
5 bar [73 psi] |
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|
|
Minimum |
0.3 bar [4 psi] |
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|
|
Ambient temperature3) |
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.
14 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
Speed (rpm) versus Displacement (%), Intermittent operation (grey area)
8000 |
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8000 |
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H1B 060 |
|
7000 |
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7000 |
6000 |
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6000 |
5000 |
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5000 |
4000 |
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4000 |
3000 |
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3000 |
2000 |
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2000 |
1000 |
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1000 |
0 |
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0 |
0% |
20% |
40% |
60% |
80% |
100% |
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P003 557 |
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H1B 080 |
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0% |
20% |
40% |
60% |
80% |
100% |
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P003 509 |
7000 |
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7000 |
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6000 |
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H1B 110 |
6000 |
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5000 |
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5000 |
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4000 |
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4000 |
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3000 |
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3000 |
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2000 |
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2000 |
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1000 |
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1000 |
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00% |
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0 |
20% |
40% |
60% |
80% |
100% |
0% |
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P003 511 |
|
6000 |
|
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6000 |
5000 |
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H1B 210 |
5000 |
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4000 |
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4000 |
3000 |
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3000 |
2000 |
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2000 |
1000 |
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1000 |
0 |
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0 |
0% |
20% |
40% |
60% |
80% |
100% |
0% |
|
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P006 001 |
|
H1B 160
20% |
40% |
60% |
80% |
|
|
100% |
|||||
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P301 307 |
H1B 250
20% |
40% |
60% |
80% |
|
|
100% |
|||||
|
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|
|
P301 457 |
W Warning
Zero 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.
© Danfoss | March 2020 |
AX152886484369en-000607 | 15 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
Speed (rpm) and Pressure (bar) versus Displacement (%)
9000 |
|
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8000 |
|
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|
|
8000 |
|
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H1B 060 |
7000 |
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H1B 080 |
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7000 |
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6000 |
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6000 |
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5000 |
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5000 |
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30bar |
4000 |
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30bar |
4000 |
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|||
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20bar |
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20bar |
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3000 |
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3000 |
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15bar |
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15bar |
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2000 |
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10bar |
2000 |
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10bar |
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5bar |
|
1000 |
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5bar |
1000 |
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2bar |
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2bar |
||
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0 0% |
20% |
40% |
60% |
80% |
100% |
0 0% |
20% |
40% |
60% |
80% |
100% |
|
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P006 010 |
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|
P006 011 |
Speed (rpm) and Pressure (bar) versus Displacement (%)
7000 |
|
|
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|
7000 |
|
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6000 |
|
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H1B 110 |
6000 |
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H1B 160 |
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5000 |
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5000 |
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4000 |
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30bar |
4000 |
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3000 |
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20bar |
3000 |
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30bar |
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20bar |
|||
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15bar |
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15bar |
|
2000 |
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10bar |
2000 |
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10bar |
|||
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1000 |
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5bar |
1000 |
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5bar |
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2bar |
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2bar |
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0 0% |
20% |
40% |
60% |
80% |
100% |
0 0% |
20% |
40% |
60% |
80% |
100% |
|
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|
P006 012 |
|
|
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|
|
P006 013 |
Speed (rpm) and Pressure (bar) versus Displacement (%)
6000 |
|
|
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|
5000 |
|
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H1B 210 |
|
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4000 |
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3000 |
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30bar |
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20bar |
2000 |
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15bar |
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10bar |
1000 |
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5bar |
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2bar |
0 0% |
20% |
40% |
60% |
80% |
100% |
|
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P006 014 |
6000
5000 |
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H1B 250 |
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4000 |
|
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3000 |
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30bar |
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2000 |
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20bar |
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15bar |
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10bar |
1000 |
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5bar |
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2bar |
0 0% |
20% |
40% |
60% |
80% |
100% |
|
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|
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.
16 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
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 of oil 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 rotating group.
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 Power Solutions 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 are used, they must be selected accordingly. Select Motor controls which use the high loop system pressure to shift the servo piston. This will ensure proper function under all conditions.
Valve blocks, such as counter balance valves attached to the inlet and/or outlet ports, must not interfere with any part of the motor. A review of the outline drawings or appropriate 3D models must be completed.
© Danfoss | March 2020 |
AX152886484369en-000607 | 17 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Technical specifications
Fluid specifications
Features |
|
Unit |
All sizes |
|
|
|
|
|
|
|
Minimum intermittent |
|
7 [49] |
|
|
|
mm2/s |
|
|
Viscosity |
Recommended range |
12-80 [66-366] |
||
[SUS] |
||||
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||
|
Maximum intermittent |
|
1600 [7416] |
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Minimum |
|
-40 [-40] |
|
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°C |
|
|
Temperature range1)2) |
Rated |
104 [220] |
||
[°F] |
||||
|
Maximum intermittent |
|
115 [240] |
|
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|
|
Required cleanliness per ISO 4406 |
- |
22/18/13 |
|
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|
|
Cleanliness and Filtration |
Efficiency (charge pressure filtration) |
β-ratio |
β15-20 = 75 (β10 ≥ 10) |
|
Efficiency (suction / return line filtration) |
β35-45 = 75 (β10 ≥ 2) |
|||
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|||
|
Recommended inlet screen mesh size |
µm |
100 – 125 |
|
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|
|
1)At the hottest point, normally case drain port.
2)Minimum: cold start, short term t<3 min, p<50 bar, n<1000 rpm.
Based on SI units |
Based on US units |
Qe |
= |
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Vg • n |
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1000 • |
v |
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Me |
= |
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Vg • p • |
mh |
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20 • |
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Pe = |
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Me • n |
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= |
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Qe • p • t |
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9550 |
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600 |
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|||||||||
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|||||
n = |
Qe • 1000 • v |
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Vg |
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Where: |
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||||
Qe |
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Input flow (l/min) |
||||||||
Me |
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Output torque (N•m) |
||||||||
Pe |
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Output power (kW) |
||||||||
n |
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Speed (min-1) |
||||||||
Vg |
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Motor displacement per rev. (cm3/rev) |
||||||||
phigh |
High pressure (bar) |
||||||||||||
plow |
Low pressure (bar) |
||||||||||||
∆p |
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High pressure minus Low pressure (bar) |
||||||||
ηv |
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Motor volumetric efficiency |
||||||||
ηmh |
Mechanical-hydraulic efficiency |
||||||||||||
ηt |
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|
Motor total efficiency (ηv • ηmh) |
Qe |
= |
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Vg • n |
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231 • |
v |
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Me |
= |
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Vg • |
p • |
mh |
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2 • |
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Pe = |
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Vg • n • p • t |
||||||||
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396 000 |
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n = |
Qe • 231 • |
v |
||||||||
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Vg |
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Where: |
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|||
Qe |
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Input flow [US gal/min] |
||||||
Me |
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Output torque [lb•in] |
||||||
Pe |
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Output power [hp] |
||||||
n |
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Speed [rpm] |
||||||
Vg |
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|
|
Motor displacement per rev. [in3/rev] |
||||||
phigh |
High pressure [psi] |
|||||||||
plow |
Low pressure [psi] |
|||||||||
∆p |
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|
|
High pressure minus Low pressure [psi] |
||||||
ηv |
|
|
|
Motor volumetric efficiency |
||||||
ηmh |
Mechanical-hydraulic efficiency |
|||||||||
ηt |
|
|
|
Motor total efficiency (ηv • ηmh) |
18 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
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
B A
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P006030 |
||
Flow into port A |
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Clockwise |
|||||||||||||||||||||||||||||||
Flow into port B |
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Counterclockwise |
|||||||||||||||||||||||||||||||
Controls M1, M2, K1, K2, KH, MH |
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CCW |
CW |
A |
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B |
|
|
P006031 |
Flow into port A |
Counterclockwise |
|
Flow into port B |
Clockwise |
© Danfoss | March 2020 |
AX152886484369en-000607 | 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 |
A |
|
B |
|
|
P006032 |
Flow into port A |
Counterclockwise |
|
Flow into port B |
Clockwise |
20 | © Danfoss | March 2020 |
AX152886484369en-000607 |
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cc
Operation
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 |
B |
L2 |
|
A |
LFRV |
P006033 |
Legend:
ASystem loop A
BSystem loop B
LFRV |
to 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 some conditions. Maintain correct charge pressure under all conditions of operation to maintain pump control performance in hydrostatic systems.
© Danfoss | March 2020 |
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