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Refinishing flywheel - ra03006010420x(0420)

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Engines 601, 602 (except 602.98), 603 

Preliminary jobs:

Flywheel and driven plate removed (03-410).

Operation No. of operation texts and operation values or standard texts and flat rates 03-8022

Fig 1: Identifying Refinishing Flywheel Dimension (1 Of 2)
G05438314Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig 2: Identifying Refinishing Flywheel Dimension (2 Of 2)
G05438315Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Dimension (b) measure, max. 17 mm, min. 15.6 mm. If dimension (a) has become so great due to material removal that dimension (b) is less than 15.6 mm, renew flywheel.
Dimension (a) measure, engines 601, 602: 22.5 mm, engine 603: 19.4 mm. Maximum material removal 1 mm, if material removal is greater than 1 mm, renew flywheel.
  IMPORTANT
If the clutch surface (A) is refinished, the mounting surface (B) must be refinished by the same dimension so that distance (a) is maintained.
Flywheel refinish
  IMPORTANT
The two-mass flywheel cannot be refinished. Clamp flywheel in lathe so that permissible deviation from flat = 0.05 mm is not exceeded.
DATA

Engine   601, 602 603
Distance a   22.5 ± 0.1 19.4 ± 0.1
Distance b in new state 16.6 ± 0.4
for repair up to 15.6 ± 0.4
Permissible deviation from flat on clutch surface or clutch attachment surface   0.05 mm
NOTE: Flywheels for manual transmissions with burned spots, scoring or cracks on the clutch surface should be refinished by precision turning.

If the scoremarks or cracks are greater than the maximum permissible material removal dimension, renew flywheel.

After machining the clutch surface should not have any porous spots or chatter marks.