This V-belt transmits drive from the engine to the threshing mechanism of the parent combine. It runs on the pulley set that connects the main drive shaft to the threshing drum input. A worn or slipping belt reduces drum speed, leading to incomplete grain separation and increased losses. The manufacturer produces this belt to match the original cross-section and length, ensuring correct tension and pulley contact without requiring shimming or modification. On installation, verify the belt sits fully in the pulley grooves and adjust tension to the specified deflection.