Check, remachine flywheel

AR03.30-T-8022B

Check, remachine flywheel

10.11.11



Removing

1

Remove flywheel (1)

AR03.30-T-8002B



Checking

2

Clean flywheel (1) and inspect clutch surface (friction surface) for scorch marks, scores and cracks and check flatness with a knife-edge straightedge (3)

 If a problem exists, the clutch face (friction face) must be re-machined by grinding or precision-turning.

Straightedge

Clutch friction surface

*BE03.30-N-1002-03E

If the scores or cracks are deeper than the maximum permissible stock removal: 

Replace flywheel.

AR03.30-T-8002B

3

Machine flywheel (1)

Flywheel outer diameter (A)
Flywheel diameter for mounting starter ring gear (B)
Flywheel diameter for clutch (D)

*BE03.30-N-1001-03E

Flywheel - overall width (F)
The width between the friction surface and contact surface must not be less than the flywheel minimum width (E) when machining the clutch surface (friction surface).

*BE03.30-N-1003-03E

If peak-to-valley height of clutch friction surface is excessive, this will increase the wear of the clutch lining.
If the peak-to-valley height is insufficient, this can result in separating problems of the clutch.
After machining, there must not be any shrink holes or chatter marks present.

*BE03.30-N-1006-03E



Install

4

Install flywheel (1)

AR03.30-T-8002B

Number

Designation

Engine 402.970,
441.980, 446.938

BE03.30-N-1001-03E

Flywheel dia.

Outer (A)

mm

487

for mounting

Default

mm

432.490 to 432.645

Starter ring gear (B)

Deviation 0.5

mm

431.990 to 432.145

For mounting the clutch (D)

mm

435.000 to 435.063

See picture

-

BE03.30-N-1002-03E

Clutch friction surface

Peak-to-valley height (Rz)

μm

16

Flatness

mm

0.03

BE03.30-N-1003-03E

Flywheel

Overall width (F)

mm

66.7 to 67

Minimum width between

New

mm

61.9 to 62.1

friction face and

at least

mm

59.9 to 60.1

mounting flange

See picture

-

for repairs (E)

-

BE03.30-N-1006-03E

Peak-to-valley height of friction surface

μm

16