Check crankshaft, main bearing and connecting rod bearing for wear and damage · ar0320w0001a · Mercedes-Benz WIS

AR03.20-W-0001A

Check crankshaft, main bearing and connecting rod bearing for wear and damage

19.9.06

ENGINE 457.9 in MODEL 374, 375, 940, 942, 943, 944, 958

ENGINE 541.9 in MODEL 930, 932, 933, 934, 950, 952, 953, 954

ENGINE 542.9 in MODEL 930, 932, 934, 950, 952, 954

	Checking
1	Remove pistons	Engine 457.9	AR03.10-W-7021C
		Engine 541.9, 542.9 in model 930, 932, 933, 934	AR03.10-W-7021G
		Engine 541.9, 542.9 in model 950, 952, 953, 954	AR03.10-W-7021B
2	Check connecting rod bearing shell and connecting rod journal through visual inspection for wear and damage	 In case of wear or damage do not conduct any further steps but remove engine instead and repair it.
	Notes on assessing wear on connecting rod bearings and connecting rod bearing journals		AH03.10-N-0001-03A
3	Check crankshaft bearing shell or fitted bearing shell and crankshaft bearing journal through visual inspection for wear and damage	 To do this remove main bearing cap and main fitted bearing cap individually, one after the other and possibly reinstall: 
		Engine 457.9	AR03.20-W-4351C
		Engine 541.9, 542.9 in model 930, 932, 933, 934	AR03.20-W-4351G
		Engine 541.9, 542.9 in model 950, 952, 953, 954	AR03.20-W-4351B
		In case of wear or damage do not conduct any further steps but remove engine instead and repair it.
	Information on assessing wear of main bearings and main bearing journals		AH03.20-N-1000-02A
4	Install pistons	Engine 457.9	AR03.10-W-7021C
		Engine 541.9, 542.9 in model 930, 932, 933, 934	AR03.10-W-7021G
		Engine 541.9, 542.9 in model 950, 952, 953, 954	AR03.10-W-7021B

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