Holder 4.74 manual 143

C 4.74	Operating instructions
		Troubleshooting guide
Problem	Cause	Remedy
Hydraulic oil heats too quickly, system	Cylinder at limit stop	Put joystick in neutral position
works against excess pressure.		(free circulation)
(engine under load)	Implement not connected but	Put joystick in neutral position
	joystick in work position (quick	(free circulation)
	coupling)
Hydraulic oil foams	Leaks in suction area	Check all pipe connections and
		tighten, if required
Hydraulic system working too slowly,	Hydraulic oil level too low	Fill up as specified
accompanied by whistling noise	Temperatures too low	Fill proper type of oil as specified in
		maintenance instructions
Steering not working	Proportional valve dirty	Clean proportional valve (installed
		on right side of body)
	Relief valve in hydraulic steering not	Remove and clean (authorized
	closing	workshop)
Lost steering motion when steering	Leaks in steering return line	Check hose couplings for leaks
direction is changed rapidly

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