This V-belt transmits drive from the engine to the straw chopper rotor on a forage harvester. It sits on the pulley between the engine output and the chopper input shaft, maintaining tension to prevent slip under variable load. A worn or stretched belt causes reduced rotor speed, leading to uneven straw length and increased load on the adjacent bearings. This belt is manufactured by Gates to match the original cross-section and length, preserving the tension range the tensioner was designed to apply. On installation, verify the belt sits fully in the pulley grooves and adjust the tensioner to the specified deflection.