Nilfisk-ALTO RS 501 Hopper and Relevant LID, Dust Control System Nozzles, Steering System, Wheels

USER MANUAL

ENGLISH

Problem	Possible cause	Remedy
HOPPER AND RELEVANT LID
The hopper does not lift/dump	The pressure is insuffi cient	Increase the pressure
	The control valve assembly is stuck	Repair
The hopper does not return to horizontal	The cylinder gaskets are worn	Overhaul the cylinders
position/lower
The hopper lid does not open/close	The actuator is faulty	Replace
DUST CONTROL SYSTEM NOZZLES
	Out of water	Fill the tank
No water from the nozzles	The pump is not turned on	Turn on the pump
	The water fi lter is clogged	Clean/replace
	The nozzles are clogged	Clean
	The water pump relay is burnt	Replace
	The pump is not operating	Repair/replace
No water to the nozzles	The water pump switch is deactivated	Activate
	The fuse is blown	Replace
	The water pump relay is burnt	Replace
The water pump does not stop	The fl oat is stuck	Repair
STEERING SYSTEM
The machine does not move straightforward	The rear axle toe-in is incorrect	Adjust
	The power steering is faulty	Replace
The steering is hard	The priority valve is faulty	Replace
	The steering wheel drive hydraulic cylinder is	Replace
	faulty
BRAKE SYSTEM
	The brake fl uid level is low	Check the brake fl uid level
	The braking masses are worn or greasy	Replace
The machine brake system is not effi cient	There is air in the line	Bleed the system
	The drum brake cylinder is faulty	Replace
	The brake fl uid pump is faulty	Overhaul
The parking brake is not effi cient	The brake is misadjusted	Adjust
STABILITY

When the machine moves the stability is reduced

The tyre pressure is incorrect

Check the tyre pressure

WHEELS

The rear wheels are noisy

The wheel bearings are worn

Replace

DRIVE POWER

	The drive pedal is faulty	Replace
	The by-pass is open	Check the by-pass screw tightening
The machine drive power is reduced	The drive system pump power decreases	Check the hydraulic system oil pressure on the
		drive system pump
	The drive system motors are worn	Replace
	The drive system pump deactivation screw for	Screw it down
	machine pushing/towing is unscrewed
The machine has no drive power	There are oil leaks from the hydraulic system	Repair
	The drive system pump is broken	Replace
	The drive system motor is broken	Replace

RS 501

33015501(3)2008-02 A

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