This V-belt transmits power from the drive system to the straw chopper input shaft on the parent combine. It is a classic-profile belt that sits in the pulley groove and relies on wedge friction to transfer torque without slipping. A worn or stretched belt causes chopper speed loss, leading to uneven straw length and increased load on the tensioner assembly. The manufacturer matches the original belt's cross-section and length so the tensioner operates within its designed travel range. On replacement, verify the belt sits fully in the pulley grooves and adjust the tensioner to the specified deflection.