Inspect, re-machine flywheel

AR03.30-I-8022B

9.7.08

ENGINE 904.941 in MODEL 684.482

I03.30-0002-09

1 Flywheel (with a diameter of 403 mm or 443 mm)

1.1 Flywheel with a diameter of 403 mm

1.2 Flywheel with a diameter of 443 mm

2 Ring gear

3 Straightedge

A Flywheel diameter

B Flywheel diameter for mounting the starter ring gear

C Flywheel diameter on crankshaft flange

D Flywheel diameter for mounting clutch

E Flywheel minimum width between coupling friction surface and support flange

F Flywheel overall width

	Removing
1	Remove flywheel (1)		AR03.30-I-8002B
	Clean
2	Clean flywheel (1)
	Checking
3	Check coupling friction surface of flywheel (1) for scorch marks, score marks and cracks	 In the case of slightly visible scorch marks or score marks the coupling friction surface of the flywheel (1) can be machined. The flywheel (1) must be replaced when there are clearly visible and perceptible score marks or cracks.
4	Check flywheel minimum width between coupling friction surface and mounting flange (E) at flywheel (1)	 If the specified value is not reached the flywheel (1) must be replaced.	*BE03.30-N-1008-03B
5	Check coupling friction surface on flywheel (1) for flatness; machine if necessary
6	Check running surface of the rear radial sealing ring on the flywheel (1) for score marks and galling	 If wear is present, a new rear radial sealing ring with associated race is available for repairs. In this case: 
		Install race.
		Replace rear radial sealing ring.	AR03.20-I-3063B
7	Check ring gear (2) on flywheel (1) for wear	 In case of wear the ring gear (2) must be replaced: 
		Replace ring gear of flywheel	AR03.30-I-8312B
	Machining
8	Machine flywheel (1)	 During machining of the coupling friction surface the flywheel minimum width between the coupling friction surface and the support flange (E) must not go below it minimum and the coupling friction surface must not demonstrate any shrink holes or chatter marks.	*BE03.30-N-1008-03B
	Checking
9	Check peak-to-valley height of coupling friction surface		*BE03.30-N-1006-03B
10	Check flywheel diameter for coupling mounting (D)		*BE03.30-N-1004-03B
11	Inspect concentricity and lateral trueness of flywheel (1)		*BE03.30-N-1009-03B
	Install
12	Install flywheel (1)		AR03.30-I-8002B

Check values for flywheel

Number	Designation		Engine 900.9, 904.9 with a 403 Ø flywheel and a 362 Ø clutch	Engine 900.9, 904.9 with a 443 Ø flywheel and a 362 Ø clutch


BE03.30-N-1004-03B	Flywheel Ø for mounting clutch (D)	mm	395.000 to 395.057	395.000 to 395.057
BE03.30-N-1006-03B	Peak-to-valley height (Rz) Clutch friction surface	μm	16	16
BE03.30-N-1008-03B	Flywheel - minimum width between friction surface and mounting flange for repairs (E)	mm	55	55
BE03.30-N-1009-03B	Flywheel - permissible concentricity and lateral trueness deviation	mm	0.05	0.05

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