Replace ring gear on flywheel · ar0330w8312a · Mercedes-Benz WIS

AR03.30-W-8312A

Replace ring gear on flywheel

29.7.11

ENGINES 902.9 in MODEL 957 with CODE (MS8) Natural gas engine

ENGINES 904.904 in MODEL 670

ENGINES 904.908 /914 /923 /936 in MODELS 668, 670

ENGINES 904.9 in MODEL 374, 375, 673, 674, 676, 958, 970, 972, 975, 976

ENGINES 906.9 in MODEL 374, 958, 970, 972, 974, 975, 976

ENGINES 906.9 in MODEL 374, 375, 950, 952, 953, 954, 957, 958

W03.30-0020-06

1 Starter ring gear

2 Flywheel

2.1 Version with a 443 mm dia. with a
362 mm dia. clutch

2.2 Version with a 403 mm Ø with a
362 mm Ø clutch

2.3 Version with a 443 mm dia. with a
395 mm dia. clutch and
version with a 487 mm dia. with a
430 mm dia. clutch

A Tapped hole (M101.5)

B Flywheel dia. for mounting the starter ring gear

Modification notes

27.1.03

Figure revised from 432.435...432.575 mm to 432.490...432.645 mm

Value changed in BE03.30-N-1002-03B for engine 906 with flywheel dia. of 487 and clutch dia. of 430.

*BE03.30-N-1002-03B

	Replace
 Danger!	Risk of injury to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
1	Remove flywheel (2)		AR03.30-W-8002A
2	Heat up starter ring gear rapidly (1) using a welding torch
3	Press off starter ring gear (1) from flywheel (2)
	Measure
4	Measure flywheel dia. for mounting starter ring gear (B) at flywheel (2)	Replace flywheel (2) if worn.	*BE03.30-N-1002-03B
5	Measure starter ring gear inner dia. of new starter ring gear (1)	 Note starter ring gear inside dia. .	*BE03.30-N-1001-04B
		The overlap between the starter ring gear (1) and flywheel (2) must be maintained.	*BE03.30-N-1002-04B
6	Warm up new starter ring gear (1) to installation temperature	 The correct installation temperature is reached once starter ring gear (1) has a bright yellow annealing color.	*BE03.30-N-1005-04B
7	Press new starter ring gear (1) onto the flywheel (2) as far as the contact surface	 The permissible radial runout of pressed on starter ring gear (1) must not be exceeded.	*BE03.30-N-1003-04B
		Starter ring gear - width	*BE03.30-N-1004-04B
8.1	Deepen core drillings for thread (arrow)	For dia. 403 mm version with clutch dia. 362 mm (2.2).
8.2	Make core drillings for threaded holes (M101.5) (A) through the existing holes in flywheel (2) in starter ring gear (1)	For dia. 443 mm version with clutch dia. 395 mm and dia. 487 mm version with clutch dia. 430 mm (2.3).
9	Cut thread (M101.5) into threaded holes (A) in starter ring gear (1)	 Only for version with a 443 mm dia. with a 395 mm dia. clutch and version with a 487 mm dia. with a 430 mm dia. clutch (2.3).
10	Install flywheel (2)		AR03.30-W-8002A

Check values for flywheel

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


BE03.30-N-1002-03B	Flywheel dia. for mounting starter ring gear (B)	mm	360.435 to 360.575	392.435 to 392.575

Check values for flywheel

Number	Designation		Engine 900.9, 902.9, 906.9, 924.9 with a 443 dia. ring gear carrier and transmission 723.6	Engine 900.9, 902.9, 904.9, 906.9, 924.9 with a 443 mm dia. flywheel and a 395 mm dia. clutch


BE03.30-N-1002-03B	Flywheel dia. for mounting starter ring gear (B)	mm	392.435 to 392.575	392.435 to 392.575

Check values for flywheel

Number	Designation		Engine 902.9, 906.9, 925.9, 926.9 with a 487 mm dia. flywheel and a 430 mm dia. clutch	Engine 900.9, 904.9 with a 403 dia. flywheel and transmission 723.6


BE03.30-N-1002-03B	Flywheel dia. for mounting starter ring gear (B)	mm	432.490 to 432.645	360.435 to 360.575

Check values for starter ring gear

Number	Designation		Engine 900.9, 904.9 with a 403 mm dia. flywheel and a 362 mm dia. clutch	Engine 900.9, 904.9 with a 443 mm dia. flywheel and a 362 mm dia. clutch


BE03.30-N-1001-04B	Starter ring gear inner dia.	mm	359.690 to 359.830	392.000...392.140
BE03.30-N-1002-04B	Starter ring gear / flywheel - overlap	mm	0.885 to 0.605	0.295...0.575
BE03.30-N-1003-04B	Starter ring gear / flywheel - permissible radial runout	mm	0.5	0.5
BE03.30-N-1004-04B	Starter ring gear - width	mm	15.6...16.0	15.6...16.0
BE03.30-N-1005-04B	Starter ring gear - installation temperature	°C	250 to 280	250 to 280

Check values for starter ring gear

Number	Designation		Engine 900.9, 902.9, 904.9, 906.9, 924.9, 925.9, 926.9 with a 443 mm dia. flywheel and a 395 mm dia. clutch	Engine 900.9, 902.9, 906.9, 925.9, 926.9 with a 443 dia. ring gear carrier and transmission 723.6


BE03.30-N-1001-04B	Starter ring gear inner dia.	mm	392.000...392.140	392.000...392.140
BE03.30-N-1002-04B	Starter ring gear / flywheel - overlap	mm	0.295...0.575	0.295...0.575
BE03.30-N-1003-04B	Starter ring gear / flywheel - permissible radial runout	mm	0.5	0.5
BE03.30-N-1004-04B	Starter ring gear - width	mm	15.6...16.0	15.6...16.0
BE03.30-N-1005-04B	Starter ring gear - installation temperature	°C	250 to 280	250 to 280

Check values for starter ring gear

Number	Designation		Engine 902.9, 906.9, 925.9, 926.9 with a 487 mm dia. flywheel and a 430 mm dia. clutch


BE03.30-N-1001-04B	Starter ring gear inner dia.	mm	432.000...432.155
BE03.30-N-1002-04B	Starter ring gear / flywheel - overlap	mm	0.575...0.385
BE03.30-N-1003-04B	Starter ring gear / flywheel - permissible radial runout	mm	0.5
BE03.30-N-1004-04B	Starter ring gear - width	mm	15.6...16.0
BE03.30-N-1005-04B	Starter ring gear - installation temperature	°C	250 to 280

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