Bearing Shells - Yaroslavl Engine Plant YMZ-536 Operation Manual

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)
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
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Fig. 14. Piston /Connecting rod unit

BEARING SHELLS