Low output torque
Check
Cause
Corrective action
1.
Pressure compensator setting
High 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 to
shift 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 to
stay at minimum displacement.
Correct control input signal.
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 case
flow. If case flow is excessive, motor may require major
repair. Contact your Danfoss authorized service
center.
Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cm3
Troubleshooting
32 |
©
Danfoss | August 2018
AX00000025en-US0504
