Holder C 9.72 H User Manual

Hydraulic oil heats too quickly,

system works against excess

pressure
(engine under load)

Control valve jammed.
Control lever remains in operated
position

(Does not automatically return to
neutral position)

Cylinder at limit stop

No implement attached, but control
lever operated (coupling)

Adjust as above

Put valve in neutral position (free

circulation)

Put valve in neutral position (free

circulation)

Hydraulic oil foams

Leaks in the suction range

Check all pipe connections and

tighten, if required

Hydraulic system working too slowly,

accompanied by whistling noise

Hydraulic oil level too low

Temperatures too low

Fill up as specified
Replace with proper type of oil as

specified in maintenance manual

Steering not working

Priority flow valve dirty

Relief valve in hydraulic steering not

closing

Remove the priority flow valve at the

steering and clean it

Remove and clean (authorized

workshop)

Lost steering motion when steering

direction is changed rapidly

Leaks in steering return line

Tighten return flow hose