3
DIAGNOSTICS
Clutch CF65/75/85 series
6-2
SYMPTOM: RESIDUAL PRESSURE IN CLUTCH SYSTEM
Possible cause Remedy
Bleed in reservoir cap closed off Check bleed in cap
Compensation bore in main cylinder closed off
by swollen seal or insufficient free thrust pin
travel.
Check free thrust pin travel or repair/replace
main cylinder
Note: In the case of a swollen seal, clean the
system and re-fill with new fluid.
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 lining 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
1
ᓻ 200337
https://www.truck-manuals.net/
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