Nilfisk-ALTO RS 501 - Manual (Page 123)

USER MANUAL ENGLISH
RS 501 33015501(3)2008-02 A 35
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
position/lower
The cylinder gaskets are worn Overhaul the cylinders
The hopper lid does not open/close The actuator is faulty Replace
DUST CONTROL SYSTEM NOZZLES
No water from the nozzles
Out of water Fill the tank
The pump is not turned on Turn on the pump
The water fi lter is clogged Clean/replace
The nozzles are clogged Clean
No water to the nozzles
The water pump relay is burnt Replace
The pump is not operating Repair/replace
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 steering is hard
The power steering is faulty Replace
The priority valve is faulty Replace
The steering wheel drive hydraulic cylinder is
faulty
Replace
BRAKE SYSTEM
The machine brake system is not effi cient
The brake fl uid level is low Check the brake fl uid level
The braking masses are worn or greasy Replace
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 machine drive power is reduced
The drive pedal is faulty Replace
The by-pass is open Check the by-pass screw tightening
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 machine has no drive power
The drive system pump deactivation screw for
machine pushing/towing is unscrewed
Screw it down
There are oil leaks from the hydraulic system Repair
The drive system pump is broken Replace
The drive system motor is broken Replace