This V-belt transmits drive torque from the engine or gearbox to the straw chopper rotor. It sits in the drive system of the chopper assembly, where it couples the input pulley to the rotor shaft. A worn or slipping belt reduces chopper speed, leading to uneven straw length and increased load on the upstream drive components. The belt is manufactured by Gates to match the original profile and pitch length, which maintains proper tension and pulley wrap without requiring shimming or offset brackets. On installation, verify belt tension per the machine's specification and check pulley alignment to prevent premature edge wear.