Removing and Installing or Replacing Clutch

(Transmission removed)





M60 / M62 / M70 / S70 / M73: Arrest flywheel with special tool 11 2 070.





M40 / M41 / M42 / M43 / M44 / M50 / M51 / M52 / S50 / S50US / S52: Arrest flywheel with special tool 11 2 170.





Release screws crosswise by 1 turn at a time until load on clutch disk spring is relieved.
Remove clutch and clutch disk.
Clean flywheel and clutch and check for wear and tear.
Replace flywheel/clutch if necessary.
Check grooved ball (Pilot) bearing in crankshaft for ease of movement and tightness and if necessary replace.
Check retaining screws on flywheel are free of oil leaks and replace if necessary.
Check clutch disk for damage and friction rust in hub profile and replace if necessary.

Important: Clutch disks dirtied by foreign materials (oil, cleaning agent etc.) must always be replaced!





Check clutch disk for wear:
Measure lining clearance at the lining rivets at each closing head (A).

Note: Rivet connection
A) Closing head
B) Swage head
The clutch disk must be replaced if the lining clearance at the closing head (A) is less than 1 mm.
Push clutch disk onto the cleaned transmission input shaft and check for easy movability.





Installation:
1. Flywheel/dual mass flywheel
2. Clutch disk
3. Clutch

Important: Handle clutch disk carefully, do not touch surfaces of friction pads.

Install clutch disk (2) in correct position.
Note designation for "engine side" / "transmission side"!





5-speed transmission: Center clutch disk with special tool 21 2 130.
6-speed transmission: Center clutch disk with special tool 21 2 120.





Important: S50 engine: Use new screws.

Fit clutch to flywheel.
To avoid tension in the cover (can cause judder when starting off), fit screws by hand and then firmly tighten crosswise by 1 turn at a time.
Tightening torque, refer to Clutch M/T, Specifications.
Remove special tools.