Measure cylinder bores

AR01.40-W-9202J

23.11.10

ENGINES 900.9 in MODELS 375.1, 970, 972, 975, 976

ENGINES 902.9 in MODEL 375.3, 950.5 /6, 952.5 /6, 953.6, 954.5

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

ENGINES 902.9 in MODELS 375.1, 970, 972, 974, 975, 976

ENGINES 924.9 in MODELS 958.0, 970, 972, 974, 975, 976

ENGINES 925.9 in MODELS 970, 972, 974

ENGINES 926.9 in MODEL 958.0

ENGINES 926.9 in MODEL 950.5 /6, 952.5 /6, 953.6, 954.5, 957, 958.2

W01.40-1104-09

1 Cylinder contact surface

2 Cylinder crankcase

3 Quick calipers for internal measurements

A Measuring device

B Measuring device

Arrow Reversal point

4  Dial indicator

5 Outside micrometer

	Removing
1	Remove cylinder head	Models 375, 950, 952, 953, 954, 958, 970, 972, 974, 975, 976	AR01.30-W-5800J
		Model 957	AR01.30-W-5800JB
2	Take off end cover of timing case and attach cranking device		AR03.30-W-1600-03J
			*BA01.60-N-1003-01A
		 Turning device	*904589046300
	Checking
3	Put piston in the cylinder barrel (1) to be measured at bottom dead center
4	Clean cylinder barrel (1) thoroughly	 Cover piston crown.
5	Check cylinder barrel (1)	 The cylinder barrel (1) must not display any scorch streaks. Individual slight scores are not critical.
	Notes for evaluation of a cylinder barrel		AH01.40-N-0001-03A
	Measure
6	Adjust dial indicator (4) and quick calipers for inner measurements (3) with outside micrometer (5) to the smallest prescribed inside diameter of the cylinder barrel (1) and set dial indicator (4) to "0"	 Read off code letter A, B or C of the respective cylinder barrel (1) on the marking areas on cylinder crankcase (2).  Set dial indicator (4) with a pretension of about 5 mm.
		Cylinder barrel inside diameter	*BE01.40-N-1001-02B
		 Dial indicator	*001589532100
7	Measure inside diameter and difference in diameter of the cylinder barrel (1) in the direction of measurement (A) and direction of measurement (B) at the upper reversal point (arrow) for the first piston ring	Cylinder barrel inside diameter	*BE01.40-N-1001-02B
		Cylinder liner wear measured in direction of travel and transverse direction	*BE01.40-N-1003-02B
		 For wear within tolerance: 
		Machine crankcase (2)	AR01.40-W-9203J
		For wear outside the largest permissible tolerance:  Replace cylinder crankcase (2).
8	Check remaining cylinder barrels (1); measure if necessary
	Install
9	Take off cranking device at timing case and attach end cover	  The cranking device must be removed before the engine is started, otherwise it may damage the flywheel or the timing case.	AR03.30-W-1600-03J
			*BA01.60-N-1002-01A
		 Turning device	*904589046300
10	Install cylinder head	Models 375, 950, 952, 953, 954, 958, 970, 972, 974, 975, 976	AR01.30-W-5800J
		Model 957	AR01.30-W-5800JB

Check values for crankcase

Number	Designation			Engine 900.9 engine 902.9 without code MS8	Engine 924.9, 925.9, 926.9 without code MS4 or MS5


BE01.40-N-1001-02B	Cylinder bore inner diameter	Code letter A	mm	101.985 to 101.991	105.985 to 105.991
		Code letter B	mm	101.992 to 102.008	105.992 to 106.008
		Code letter C	mm	102.009 to 102.015	106.009 to 106.015
BE01.40-N-1003-02B	Wear on cylinder bore at top reversal point of first piston ring	measured in the driving or transverse direction	mm	0.1	0.1

Check values for crankcase

Number	Designation			Engine 924.9, 925.9, 926.9 with code MS4 or MS5


BE01.40-N-1001-02B	Cylinder bore inner diameter	Code letter A	mm	105.985 to 105.991
		Code letter B	mm	105.992 to 106.008
		Code letter C	mm	106.009 to 106.015
BE01.40-N-1003-02B	Wear on cylinder bore at top reversal point of first piston ring	measured in the driving or transverse direction	mm	0.1

 Timing case

Number	Designation		Engines 900.9, 902.9, 904.9, 906.9	Engine 924.9, 925.9, 926.9


BA01.60-N-1002-01A	Inspection hole closure cover to timing case	Nm	25	25
BA01.60-N-1003-01A	Bolt, turning device to timing case	Nm	25	25

904 589 04 63 00

Cranking device

Dial indicator

001 589 53 21 00

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