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BJ5-620 Troubleshooting 58 of 73
Hydraulic Troubleshooting
Problem Possible Cause Possible Remedy
Electric source. Correct wire connection.
Motor doesn’t work.
Motor damage. Replace motor.
Motor not functioning. Correct wire connection.
Oil pump doesn’t work.
Pump damage. Replace pump.
Filter jam. Clean the filter.
Hydraulic oil is too thick. Change hydraulic oil.
Hydraulic oil has bad quality. Change hydraulic oil.
Pipe is leaking. Tighten pipe connectors.
Pump damage. Change pump.
Oil pump noise
Motor and pump
misalignment.
Spillover valve and
sequence valve jam.
Clean spillover and
sequence valves.
Working pressure is
abnormal.
Pump damage. Replace pump.
Sealing is broken. Change sealing.
Pipe is leaking. Check and solve leak.
Pressure maintain is
abnormal.
Single direction valve jam. Clean the valve.
Pressure is abnormal.
Clean spillover valve and
sequence valve.
Magnetic valve is abnormal.
If the valve jams, clean it; if it
is broken, replace it.
Work is abnormal.
Electrical problem.
Check and change the
broken electrical parts.
High oil temperature.
Sequence valve pressure is
too high.
Correctly set it to 30 bar.