81
336 804 3001.0704
Troubleshooting guide
Trouble
Possible Cause
Remedy
See Page
Abnormal noise Suction filter restricted.
Suction hoses leak, oil foams.
Hydraulic pump damaged, seals faulty,
causing air intake.
Oil of wrong viscosity, low oil level in tank.
No or too low pressure in Pump suction faulty, noises.
system Pump failure, pressure valves do not close,
valve seat damage.
Pipeline broken or leaky.
Oil of low viscosity, causing high leakage losses.
Oil pressure fluctuates Causes as under abnormal noise.
Lift and tilt cylinders have tight spots.
Mast does not extend completely or retracts
slightly after being extended.
Hydraulic oil temperature Pump failure, valves leaking.
too high Oil level too low.
Failure of the working Battery discharge at 80 %.
hydraulic system Faulty fuse.
Truck does not start Battery is discharged.
Loose electrical connections.
Overhead guard not locked correctly.
Fuses blown.
Clean or replace filter.
Tighten hose connections. Check oil level, top up if
necessary.
Have inspected by your authorised distributor.
Change oil, use specified viscosity. Replenish oil.
Change oil, replenish oil.
Have repaired by distributor’s mechanic.
Replace pipe or tighten connections.
Change oil, use specified viscosity.
See under abnormal noise.
Have boots replaced by a workshop.
Replenish oil.
Check oil level; if necessary, replenish oil.
Check, charge or replace the battery.
70, 72
72, 77, 80
72, 77
70
77, 80
Have repaired by a workshop.
72
Renew the fuse.
72
24, 25
Check, charge or replace the battery.
Tighten battery terminals, coat with
non-acidic grease.
Check electric motor cable connections.
Close the overhead guard correctly.
Replace fuses.
24, 25
25
74
23
44, 45
75
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