This V-belt transmits power from the engine drive pulley to the driven components in the combine harvester's drive system. It sits in the primary drive circuit, connecting the crankshaft output to the input shaft of the main gearbox or hydraulic pump assembly. A worn or stretched belt slips under load, causing a drop in rotor speed and reduced threshing 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 tensioner adjustment. On installation, verify the belt tension matches the specification for the drive system.