This V-belt transmits power from the engine drive pulley to the rotor or threshing drum input pulley in a combine harvester. It sits in the primary drive system, routing torque through a tensioner and idler assembly to maintain consistent belt wrap. A worn or glazed belt slips under load, causing the rotor speed to drop and reducing separation efficiency. This original-manufacturer belt is molded to the same cross-section and length as the original assembly, so it seats correctly in the pulley grooves without requiring shimming or pulley alignment changes. On installation, verify the tensioner arm moves freely and set the deflection to the value specified for the drive layout.