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
General description.......................................................................................................................................................................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........................................................................................................................................................20
Loop flushing relief valve............................................................................................................................................................21
Speed sensor................................................................................................................................................................................... 22
Displacement limiter.....................................................................................................................................................................22
Operating parameters
Output speed...................................................................................................................................................................................23
System pressure............................................................................................................................................................................. 23
Case pressure...................................................................................................................................................................................24
External shaft seal pressure........................................................................................................................................................24
Temperature....................................................................................................................................................................................24
Fluid and filter maintenance
Fluid and filter recommendations........................................................................................................................................... 25
Pressure measurements
Ports and Gauge Information....................................................................................................................................................26
Initial startup procedures
Procedure..........................................................................................................................................................................................28
Troubleshooting
Overview........................................................................................................................................................................................... 30
Electrical troubleshooting.......................................................................................................................................................... 30
Sluggish operation........................................................................................................................................................................ 30
System operating hot...................................................................................................................................................................30
Excessive noise or vibration.......................................................................................................................................................31
Motor operates normally in one direction only..................................................................................................................31
Improper output speed............................................................................................................................................................... 31
Low output torque........................................................................................................................................................................ 32
Required tools and standard procedures
Adjustments
Optional threshold adjustment – Electric proportional controls................................................................................. 35
Optional threshold adjustment – Hydraulic proportional controls.............................................................................36
Pressure Compensator OverRide (PCOR) adjustment......................................................................................................37
Minor repair
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cm3
Contents
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Danfoss | August 2018 AX00000025en-US0504 | 3
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