Holder 4.74 manual Problems in the hydraulic system and steer- ing

Operating instructions

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.

C 4.74

Problem	Cause	Remedy
Power lift or hydraulic cylinders not	Slide valve in input plate stuck due	Remove and clean slide valve in
lifting. No pressure build-up noticeable	to foreign objects.	input plate LU8SSCS-
(steering working normally).		OM22/04!
		Do not change pressure setting!
Power lift lifting with too little power.	Pressure setting too low	Reset pressure with pressure gauge
		(190 bar).
	Oil level too low.	Fill up specified type of oil
Operating pressure is only reached	Pump defective	Replace pump
with high RPM
Power lift not lifting	Lift cylinder leaky	Clean / replace
Not enough power	Valve leaky
Drops after operation.

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