DAF LF45 Series, Service Manual

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DIAGNOSTICS
5-2
©
200508
Clutch
1
ΛΦ45/55
series
3
SYMPTOM: FLUID LEAK VIA VENT OPENING
Possible cause Remedy
Leak through piston seal in clutch servo Repair or replace clutch servo
Note: A drop of oil in the vent opening is a normal
situation and is not a reason to repair/replace the
clutch servo
SYMPTOM: CLUTCH PLATE SLIPS
Possible cause Remedy
Worn lining Replace lining
Oil on lining Replace linings and check engine and gearbox
sealing rings
Dirt on clutch plate and flywheel Clean plate and surrounding area
Burnt clutch plate Check entire clutch and replace if necessary
Clamping force of clutch release assembly too low
or absent
Check clutch release assembly and replace if
necessary
Clutch release assembly is not released Check clutch release assembly
SYMPTOM: CLUTCH RELEASE ASSEMBLY FAILS TO RELEASE
Possible cause Remedy
Fluid level in hydraulic system too low Top up fluid
Incorrect pedal setting Check setting and adjust if necessary
Air in hydraulic system Bleed hydraulic system
Leak in hydraulic system Check hydraulic system
Fingers of clutch release assembly broken Replace clutch release assembly
Wrong clutch release assembly has been fitted Fit correct clutch release assembly
Clutch fork is broken Replace fork
Clutch release assembly badly soiled Clean entire clutch
Defective clutch servo Check clutch servo and replace if necessary
Thrust bearing incorrectly fitted Fit thrust bearing correctly
Clutch housing disconnected from gearbox Tighten the clutch housing bolts to the correct
torque
DAF LF Gearboxes and Clutch Service Manual