Yaroslavl Engine Plant YMZ-536, Руководство по эксплуатации

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Fig. 14. Piston /Connecting rod unit
1
– piston;
2
– compression rings;
3
– oil control ring;
4
– piston pin;
5
– circlips;
6
– connecting rod;
7
– small end shell;
8
– connecting rod
cap fixing bolts;
9
– marking place for the group number ( А , В , С );
10
– marking place for the match marks (numbers from 0001 to 9999)
BEARING SHELLS
The crankshaft main bearing shells and the connecting rod big
end bearing shells are replaceable thin-walled shells with a bronze-
coated steel back.
The upper and the lower shells of the crankshaft main bearing
are not interchangeable. The upper shell has a hole and a groove for