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C 4.74
Operating instructions
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Troubleshooting guide
Problems in the hydraulic system and steer-
ing
NOTE
These notes only apply for valve arrange-
ments conforming to our circuit diagrams or
approved by Bucher Hydraulics.
Problem Cause Remedy
Power lift or hydraulic cylinders not
lifting. No pressure build-up noticeable
(steering working normally).
Slide valve in input plate stuck due
to foreign objects.
Remove and clean slide valve in
input plate LU8SSCS-
OM22/04!
Do not change pressure setting!
Power lift lifting with too little power. Pressure setting too low
Oil level too low.
Reset pressure with pressure gauge
(190 bar).
Fill up specified type of oil
Operating pressure is only reached
with high RPM
Pump defective Replace pump
Power lift not lifting
Not enough power
Drops after operation.
Lift cylinder leaky
Valve leaky
Clean / replace