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GRN4-610 Chapter 6: Troubleshooting 60 of 73
Problem
Possible Cause
Possible Remedy
Motor doesn’t work
Electric source
Motor damage
Correct wire connection
Replace motor
Oil pump doesn’t work
Motor not working
Pump damage
Correct wire connection
Replace pump
Oil pump noise
Filter jam
Hydraulic oil to thick
Poor hydraulic oil quality
Pipe leaking
Pump damage
Motor and pump
misalignment
Clean the filter
Change hydraulic oil
Change hydraulic oil
Tighten pipe connectors
Change pump
Working pressure abnormal
Spillover valve and sequence
valve jam
Pump damage
Clean spill over valve and
sequence valve
Change pump
Pressure maintain abnormal
Sealing broken
Pipe leak
Single direction valve jam
Change sealing
Check and solve the leak
Clean the valve
Work abnormal
Pressure abnormal
Magnetic valve abnormal
Electrical problem
Clean spill over valve and
sequence valve
If the valve jams, clean it. If
it is broken, change it
Check and change the
broken electrical parts