Yaroslavl Engine Plant YMZ-536 Operation Manual page 68

Fig. 17а. Accessory drive belts (second option):
1 – crankshaft pulley and damper; 2 – tension roller;
3 – water pump pulley; 4 – belt; 5 – fan drive pulley;
6 – tension roller; 7 – belt; 8 – generator pulley;
9 – intermediate roller; 10 – AC compressor pulley
The third option is designed for vehicles where the fan impeller
installed outside the engine (some bus models). In this case the
impeller is driven from a pulley additionally mounted by the consumer
on the torsional vibration damper, and instead of the fan drive, a
tension roller is installed on the engine.
Each belt has an identification number on its outer surface:
5340.1308170-10 – fan and water pump drive belt;
5340.3701170-10 – generator drive belt (on the engines without
5340.8114170-10 – generator and AC compressor drive belt;
5362.3701170-10 – generator drive belt for the package w/o fan
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AC compressor);
drive