Holder 4.74 manual Troubleshooting guide

C 4.74	Operating instructions
		Troubleshooting guide
Problem	Cause	Remedy
No forward and reverse travel	Forward/reverse selector switch	Replace forward/reverse selector
	defective or bad contact	switch, make contact
	Drive program switch at 0	Select desired driving program
No forward and reverse travel or only	Fault in boost or high pressure system	Check boost pressure in hydraulic
one direction		system
		Check high-pressure hydraulic
		system
		Check control units and proportional
		solenoids of variable-displacement
		pumps
		Eliminate detected faults
No fast-slow available	Driving program switch defective	Renew driving program switch
	Hydraulic valve for slow/fast defective	Check hydraulic valve
	or no pressure available
	Electric connection to hydraulic valve	Make connection
	for slow/fast interrupted or bad contact
Vehicle drives in one direction only	Forward/reverse selector switch	Replace forward/reverse selector
	defective	switch
	Electrical connection to the variable-	Make connection
	displacement pump interrupted

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