This V-belt transmits drive from the engine or gearbox to the chopper drum and feed rollers of a forage harvester. It sits in the primary drive path, maintaining the correct tension to keep the drum speed consistent under varying crop loads. A slipping or worn belt reduces chopping efficiency and can cause uneven cut length. The belt is manufactured to the original profile and length specifications, which ensures it seats correctly in the pulley grooves without requiring shimming or adjustment of the tensioner beyond normal service range. On installation, verify the belt runs in the correct rotation direction and tension it to the value specified for the drive system.