L10016 05/03 Hydraulic Check-out Procedure L10-17
• Housing scored
heavily
• Inlet peened and
battered
• Foreign object
caught in gear teeth
Damage caused by metal object -
Object not removed during a previous
failure repair.
Thoroughly clean and flush hydraulic sys-
tem.
Check other system components for possi-
ble source of metallic object.
• Pressure plate black
• O-rings and seals
brittle
• Gear and journals
black
Excessive heat.
Check hoist system relief valve settings.
Verify correct hydraulic oil level.
Verify correct oil viscosity.
• Broken shaft
• Broken housing or
flange
Excessive pressure.
Check relief valve pressure.
Verify relief valve is functioning properly.
TROUBLESHOOTING CHART
(Hoist Pump)
Trouble Possible Cause Suggested Corrective Action
To Next Page
Loading...
