This V-belt transmits power from the engine or main driveline to the chopper drum and feed-roll assembly in a forage harvester. It sits in the drive system, connecting the primary pulley to the driven pulley that rotates the cutting and processing components. A worn or slipping belt reduces drum speed, leading to uneven chop length and increased load on the tensioner. The belt is manufactured to match the original cross-section and length, ensuring it seats correctly in the pulley grooves without requiring shimming or altered tension settings. On installation, verify the belt runs in the correct direction and adjust the tensioner to the specified deflection.