Problem | Cause | Remedy |
---|---|---|
Bearing running eccentrically to diaphragm fingers | Bearing not centreing | Renew bearing |
No drive | Renew pressure plate or driven plate | |
Incorrect driven plate | Torsion damper incorrect for vehicles application | Fit correct driven plate |
Torsion damper broken | Incorrect damper | Fit correct driven plate |
Release bearing defective | Not rotating smoothly | Renew bearing |
Spigot (pilot) bearing defective | Bearing seized | Renew bearing |
Damaged damper spring breakout | Incorrect driving habits Wrong gear selection |
Renew driven plate |
1. Worn diaphragm spring fingers
Cause
• Release bearing seized
• Faulty release system
• Incorrectly adjusted release system
2. Damaged idle damper
Cause
• Incorrect fitting
• Incorrect driven plate
3. Retainer spring damaged
Cause
• Incorrect fitting
-> Incorrect diaphragm spring in clutch assembly
4. Spring window damaged
Cause
• Incorrect driven practice
-> Driving the vehicle in too high a gear at low revs
• Incorrect clutch driven plate
5. Torsion damper spring broken out
Cause
• Facings contaminated with oil
• Out of tune engine
• Faulty release mechanism
-> Chatter vibration damages the torsion damper
6. Torsion damper stop rivet worn
Cause
• Incorrect driven practice
-> Driving the vehicle in too high a gear at low revs
• Incorrect clutch driven plate
7. Spline damaged on one side forming a taper, torsion damper damaged
Cause
• Faulty spigot (pilot)
• Misalignment condition between engine and gearbox
8. Worn splines
Cause
• Worn or missing spigot (pilot) bearing
• Misalignment condition between engine and gearbox
• Damaged gearbox input shaft
• Induced torsional vibration
9. Casing and ball bearing damage
Cause
• Overheating of release bearing due to incorrect clearance causing loss of grease and break up of bearing
10. Release bearing worn
Cause
• Incorrect adjustment of release arm
• Insufficient bearing preload
(specification 80 – 100 N)
11. Gearbox snout worn
Cause
• Incorrect grade of grease or no grease used
• Damaged release bearing
12. Running surface on release bearing worn
Cause
• Release system worn
• Incorrect bearing preload
(specification 80 – 100 N)
13. Worn release lever
Cause
• None or incorrect grease used
14. Release bearing tappet points worn
Cause
• Tappet points not lubricated
• Release system worn
15. Push rod wear mark off centre
Cause
• Damaged release system
-> Bearing worn
-> Guide bush worn
16. Damaged bearing lugs
Cause
• Damaged release system
17. Bearing fouling clutch cover
Cause
• Clutch cover and release bearing mismatch
18. Torsion damper broken
Cause
• Incorrect driven practice
-> Driving the vehicle in too high a gear at low revs
-> Grease/oil contaminated facing
19. Hub assembly broken
Cause
• Incorrect fitting
-> Driven plate fitted the wrong way round