Holder C 9.78 H Problems in the Hydraulic System and Steering, C 9700 ... C 9.88 H, Cause, Remedy

C 9700 ... C 9.88 H

Operating Instructions

Malfunctions, cause, remedy

Problems in the Hydraulic System and

Steering

NOTE

These notices only apply for valve arrange- ments conforming to our circuit diagrams or approved by Bucher.

Problem	Cause	Remedy
Lifter or hydraulic cylinders not lifting,	Pressure relief valve jammed due to	Remove and clean pressure
although control valve can be moved	foreign objects	limitation valve LU 08 SCS-OM2,
normally. No build-up of pressure		but do not change the pressure
(steering working normally)		setting!
Loss of lifting 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
Manual control valve jammed	Radial torsion	Tension screws too tight or not all
		tightened to the same torque
		Maximum torque 25 Nm (2.5 mkp)
	Dirt	Remove and clean valve

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