This V-belt transmits drive from the engine or gearbox to the straw chopper rotor inside the combine harvester. It sits in the drive system, connecting the output pulley to the chopper input pulley. A worn or slipping belt reduces chopper speed, leading to uneven straw distribution and increased load on the drive bearings. This original belt is manufactured to match the original cross-section and pitch length, ensuring correct tension and pulley contact without requiring shimming or adjustment beyond standard tensioning. On replacement, inspect the pulley grooves for wear and set belt tension to the specified deflection.