Crankshaft marking:
1 — crank pin diameter class No.1;
2 — crank pin diameter class No.2;
3 — crank pin diameter class No.3;
4 — crank pin diameter class No.4;
5 — class of main journal diameter No.1;
6 — class of main journal diameter No.2;
7 — class of main journal diameter No.3;
8 — class of main journal diameter No.4;
9 — class of main journal diameter No.5.
