DAF CF65, CF75, CF85 Series . Manual — part 96
©
200346
1-1
Cab heating
DIAGNOSTICS
ΧΦ65/75/85 series
1
1
1. CAB HEATING
1.1 FAULT FINDING TABLE, CAB HEATING
SYMPTOM: CAB TEMPERATURE TOO HIGH
Possible cause
Remedy
Heater valve cannot be fully closed.
Check the setting of the heater valve.
DIAGNOSTICS
1-2
©
200346
Cab heating
1
ΧΦ65/75/85 series
1
©
200346
2-1
Cab suspension
DIAGNOSTICS
ΧΦ65/75/85 series
1
1
2. CAB SUSPENSION
2.1 FAULT-FINDING TABLE, CAB SUSPENSION
Air-sprung cab
SYMPTOM: SUSPENSION TOUCHES BUMP STOP
Possible cause
Remedy
Incorrectly adjusted suspension.
Check setting.
Leaking spring element.
Replace spring element.
Defective height control valve.
Replace height control valve and adjust
suspension.
Defective valve.
Replace valve.
SYMPTOM: INSUFFICIENT LATERAL DAMPING
Possible cause
Remedy
Worn or damaged horizontal dampers at the rear
of the cab.
Replace both dampers.
Worn or damaged silentblocks in front cab
suspension.
Replace both silentblocks.
SYMPTOM: AIR LEAKAGE
Possible cause
Remedy
Damaged air bellows.
Replace air bellows.
Leakage in line connections.
Check line connections.
Internal leakage of height control valve.
Replace height control valve.
DIAGNOSTICS
2-2
©
200346
Cab suspension
1
ΧΦ65/75/85 series
1
2.2 FAULT-FINDING TABLE, CAB TILTING MECHANISM
SYMPTOM: TILTING CYLINDER FAILS TO RESPOND
Possible cause
Remedy
Damaged or broken pipe.
Replace pipe or connection.
Pump reservoir empty.
Top up reservoir and check for leaks.
Worn or damaged cylinder seal.
Replace the cylinder or fit a reconditioning set.
SYMPTOM: PUMP ROD REBOUNDS
Possible cause
Remedy
Return stroke leakage.
Replace the tilting pump.
SYMPTOM: PUMP ONLY FUNCTIONS IN THE LAST PART OF THE STROKE
Possible cause
Remedy
Low oil level in oil reservoir.
Top up oil reservoir.
Leaking inlet valve (ball).
Remove the two-way valve and check the inlet
valve. Clean it or fit a reconditioning set.
Polluted inlet strainer.
Clean reservoir and strainer.
SYMPTOM: PUMP OPERATES WITH DIFFICULTY, CYLINDER DOES NOT RESPOND
Possible cause
Remedy
Two-way valve incorrectly fitted after repair.
Remove the notched pin from the two-way valve
and turn it 180
|. Refit the notched pin in the two-
way valve.
SYMPTOM: PUMP FAILS TO GENERATE PRESSURE
Possible cause
Remedy
Reservoir level too low.
Top up the reservoir.
Leaking inlet valve (ball).
Remove the two-way valve and check the inlet
valve. Clean it or fit a reconditioning set.
Worn or damaged O-rings on the two-way valve.
Fit a reconditioning set.
Pressure limiting valve incorrectly set.
Check the pressure limiting valve (using a
pressure gauge only) and adjust, if necessary.
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