Check piston and connecting rod for wear and damage · ar0310w0001b · Mercedes-Benz WIS

AR03.10-W-0001B

Check piston and connecting rod for wear and damage

23.11.10

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

ENGINES 902.9 in MODELS 375.3, 950, 952, 953, 954, 957

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

ENGINES 904.9 in MODELS 374, 375.1, 958.0, 970, 972, 975, 976

ENGINES 906.9 in MODELS 374, 958.0, 970, 972, 974, 975, 976

ENGINES 906.9 in MODEL 374.5, 375.3, 950, 952, 953, 954, 957, 958.2

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 MODELS 950, 952, 953, 954, 957, 958.2

	Checking
1	Remove cylinder head	Engine 900.9, 924.9, 925.9 engine 902.9, 926.9 except in model 957	AR01.30-W-5800J
		Engine 904.9 engine 906.9 without code (MS8) natural gas engine	AR01.30-W-5800A
		Engine 902.9, 906.9 in model 957 with code (MS8) natural gas engine	AR01.30-W-5800H
		Engine 902.9 in model 957 without code (MS8) natural gas engine Engine 926.9 in model 957	AR01.30-W-5800JB
2	Check piston crown by means of visual inspection for wear and damage
	Notes on the assessment of pistons and piston rings		AH03.10-N-0001-04A
3	Check cylinder barrel for wear and damage		AR01.40-W-0003B
4	Remove pistons	 Only if wear or damage was found on the piston crown or cylinder contact surface.
		Engines 900.9, 924.9, 925.9, 926.9 Engine 902.9 without code (MS8) Natural gas engine	AR03.10-W-7021J
		Engine 902.9 with code (MS8) natural gas engine Engine 904.9, 906.9	AR03.10-W-7021A
5	Check piston skirt and piston ring by means of a visual inspection for wear and damage
	Notes on the assessment of pistons and piston rings		AH03.10-N-0001-04A
6	Remove connecting rod and check connecting rod bearing bushing (connecting rod eye) through visual inspection for wear and damage or angular movement of the oil holes	 The connecting rod must be replaced if there are score marks and notches. Can the damage profile no longer be assessed clearly: 
		Check connecting rod.
		Engine 902.9 with code (MS8) natural gas engine Engine 904.9, 906.9	AR03.10-W-6111A
		Engine 900.9, 924.9, 925.9, 926.9 engine 902.9 without code (MS8) Natural gas engine	AR03.10-W-6112J
7	Check connecting rod bearing and connecting rod journal by means of a visual inspection for wear and damage	 If damage or wear was determined, the engine must be removed and repaired.
	Notes on assessing wear on connecting rod bearing and connecting rod journal		AH03.10-N-0001-03A
8	Install pistons	Engines 900.9, 924.9, 925.9, 926.9 Engine 902.9 without code (MS8) Natural gas engine	AR03.10-W-7021J
		Engine 902.9 with code (MS8) natural gas engine Engine 904.9, 906.9	AR03.10-W-7021A
9	Install cylinder head	Engine 900.9, 924.9, 925.9 engine 902.9, 926.9 except in model 957	AR01.30-W-5800J
		Engine 904.9 engine 906.9 without code (MS8) natural gas engine	AR01.30-W-5800A
		Engine 902.9, 906.9 in model 957 with code (MS8) natural gas engine	AR01.30-W-5800H
		Engine 902.9 in model 957 without code (MS8) natural gas engine Engine 926.9 in model 957	AR01.30-W-5800JB

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