Clutch Disc: Service and Repair

Clutch Removal:
- Remove transmission.
- Check diaphragm spring tip deviation.
- Hold flywheel with Special Tool 11 2 160.
- Loosen mounting bolts one after the other by 1 to 1 1/2 turns until the clutch is relaxed.
- Remove mounting bolts, clutch disc and pressure plate.

CAUTION:
Don't throw or let clutch fall.
Improper handling could cause tangential leaf springs, holding clutch in direction of turning, to be bent off.
Diaphragm spring would still initiate lift off, but because of weak leaf springs pressure ring would not lift off far enough and clutch disc will not be cleared.

Inspections:




- Measure clutch disc for wear (A).
- Check clutch disc for cracks and the torsional damper for tight fit of spring elements.
- Check lateral runout of the clutch disc.




- Visually inspect pressure plate for cracks, wear and burnt spots.
- Check pressure contact surface for warpage.




- Visually inspect rivets for wear and tight fit.
Replace a pressure plate with loose or worn rivets.

- Check flywheel for scoring.
- Check grooved ball bearing in crankshaft for easy movement, replacing if necessary.

Installation Notes:
Note mark on clutch disc to indicate side to face transmission.
Remove all corrosion inhibitor when installing a new clutch.
Give keyways of transmission input shaft a light coat of Molykote Longterm 2.

Installation:




- Center clutch disc in flywheel with Special Tool 21 2 100.





- Install pressure plate on dowel pins.
- Tighten mounting bolts uniformly in order to correct tightening torque.