DAF LF45 Series Service Manual

©
200508 5-1
Clutch
DIAGNOSTICS
ΛΦ45/55 series
3
1
5. CLUTCH
5.1 FAULT-FINDING TABLE
SYMPTOM: CLUTCH PEDAL FAILS TO RETURN
Possible cause Remedy
Broken pedal return spring Replace spring
Worn clutch pedal bearings Check bearings and replace if necessary
Dirt in hydraulic system Clean system and fill with fresh fluid
Incorrect fluid in hydraulic system Replace with fluid of correct specification
Air in hydraulic system Bleed the system
SYMPTOM: CLUTCH PEDAL STICKS WHEN PRESSED
Possible cause Remedy
Leak in hydraulic system Check system
Air in hydraulic system Bleed hydraulic system
Release bearing incorrectly fitted Fit the release bearing correctly
Fork hinge points or fork itself worn Check hinge points and fork; replace if necessary
Defective clutch servo Repair and/or replace clutch servo
Gearbox front cover worn or broken Check, replace gearbox front cover
SYMPTOM: PEDAL FORCE TOO HIGH
Possible cause Remedy
No or insufficient pressure in circuit 4 of the brake
system
Check circuit 4 of the brake system
Kinked air pipe Check pipe and replace if necessary
Kinked hydraulic pipe Check pipe and replace if necessary
Worn clutch pedal bearings Check bearings and replace if necessary
Defective clutch servo and/or main cylinder Repair or replace clutch servo and/or main cylinder
Note: In the case of a swollen seal, clean the
system and re-fill with new fluid
SYMPTOM: RESIDUAL PRESSURE IN CLUTCH SYSTEM
Possible cause Remedy
Bleed vent in reservoir cap closed off Check bleed vent 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
DAF LF Gearboxes and Clutch Service Manual

DAF LF45 Series Specifications

General

Brand	DAF
Model	LF45 Series
Category	Trucks
Language	English