Determine thickness of crankshaft fitted bearing thrust plates · ar0320w435101b · Mercedes-Benz WIS

AR03.20-W-4351-01B

Determine thickness of crankshaft fitted bearing thrust plates

Engine	902.9 in model 957
	with code MS8 (Natural gas engine)
Engine	904.9 in model 374
Engine	904.9 in model 375, 673, 674, 676, 970, 972, 975, 976
Engine	904.904 in model 670
Engine	904.908/914/923/936 in model 668, 670
Engine	904.941
Engine	906.9 in model 374, 375, 950, 952, 953, 954, 957
Engine	906.9 in model 970, 972, 974, 975, 976

Check values of crankshaft

Number	Designation			Engine 902.9 with code MS8, engine 906.9	Engine 904.9
BE03.20-N-1002-02B	Fitted bearing journal width	Standard dia.	mm	85,990...86,010	85,990...86,010
		Standard width	mm	31,000...31,062	31,000...31,062
		Dia. deviation -0.1	mm	85,890...85,910	85,890...85,910
		Standard width	mm	31,000...31,062	31,000...31,062
		Dia. deviation -0.1	mm	85,890...85,910	85,890...85,910
		Width deviation 0.3	mm	31,300...31,362	31,300...31,362
		Dia. deviation -0.25	mm	85,740...85,760	85,740...85,760
		Width deviation 0.3	mm	31,300...31,362	31,300...31,362
		Dia. deviation -0.5	mm	85,490...85,510	85,490...85,510
		Width deviation 0.5	mm	31,500...31,562	31,500...31,562
		Dia. deviation -0.75	mm	85,240...85,260	85,240...85,260
		Width deviation 0.5	mm	31,500...31,562	31,500...31,562
		Dia. deviation -1.0	mm	84,990...85,010	84,990...85,010
		Width deviation 0.5	mm	31,500...31,562	31,500...31,562

Check values of crankshaft

Number	Designation		Engine 902.9 with code MS8, engine 906.9	Engine 904.9
BE03.20-N-1006-02B	Axial play	mm	0,16...0,38	0,16...0,38

Check values of crankshaft

Number	Designation			Engine 902.9 with code MS8, engine 906.9	Engine 904.9
BE03.20-N-1016-02B	Wall thickness of fitted bearing thrust washers	Default	mm	3,240...3,310	3,240...3,310
		Deviation 0.3	mm	3,390...3,460	3,390...3,460
		Deviation 0.5	mm	3,490...3,560	3,490...3,560

 Cylinder crankcase, timing case cover, end cover

Number	Designation			ENGINE 900.9, 902.9, 904.9, 906.9
BA01.40-N-1001-01C	Bolt, main bearing cap to crankcase	Stage 1	Nm	30
		Stage 2	Nm	80
		Stage 3	Nm	155
		Stage 4	°	90

Determine thickness of crankshaft fitted bearing thrust plates

001 589 53 21 00

Dial gage

363 589 02 21 00

Dial indicator holder

1	Measure fit bearing journal width (A) of crankshaft (1) and select thrust plates to match the measured fit bearing journal width (A).

 The specified dimensions must be maintained.
Thrust plates are factory-supplied ready for installation and also in oversizes for repairs. No reworking is permissible.

W03.20-0034-01

2	Lubricate thrust plates (2) and insert into grooves at bearing cap (fitted bearing) (3).

 Only thrust plates (2) of the same wall thickness may be installed. Both oil grooves (arrows) in thrust plates (2) must face toward crank webs.

W03.20-0035-01

3	Install bearing cap (fitted bearing) (3).

 Lubricate main bearing bolts and tighten to torque value. The bearing cap (fitted bearing) (3) is offset in the crankcase from the center and marked with numbers (arrow).

4	Rotate crankshaft by hand and check for unobstructed movement.

W03.20-1003-01

5	Install dial indicator holder (4)  and dial indicator (5)  with preload on crankcase.

6	Move the crankshaft (1) from stop to end stop (arrows) and read off the measurement value (axial play) on dial indicator (5)  .

 The axial play must not exceed the specified figure.

W03.20-0037-01