Clutch Disc: Service and Repair

21 21 500 - Removing and installing or replacing clutch





Special tools required:





Necessary preliminary tasks:
Transmission 23 00 026 Removing and Installing Transmission (GS6-55BG) removed.





Lock flywheel with special tool 11 9 590.





Slacken bolts uniformly.

Unscrew bolts.

Remove pressure plate and clutch plate.

Clean flywheel and check for wear and damage.

If necessary, replace flywheel .





Check clutch plate for damage and friction rust, replace if necessary.

Replace contaminated clutch plate (oil, cleaning agent etc.).

Note: Direction marking GEARBOX SIDE (1) for transmission side of clutch plate.





Check clutch disc for wear.

Measure lining protrusion on transmission side.

Measure from rivet head (1).

The clutch plate must be replaced if the lining clearance at the rivet head (1) is less than 1 mm.





Install pressure plate and clutch plate with special tool.

N12 with GS655BG: 21 2 290

N14 with GS653BG: 21 6 110





Replace bolts of pressure plate and tighten down in sequence (1-6).

Installation:
Turn centering mandrel 21 2 290 (21 6 110) outwards in stages when tightening down pressure plate. Pressure plates must not touch centering mandrel.

Tightening torque 21 21 4AZ [1][2]Pressure Plate.





Note:
Turn special tool 21 2 290 when tightening down the pressure plate in order to center the clutch plate better.

Remove special tool 11 9 590.

Remove special tool 21 6 110.