This V-belt transmits power from the engine drive pulley to the input shaft of the threshing and separation system. It is a four-ribbed, wrapped belt designed for the primary drive circuit of the parent combine harvester. A worn or slipping belt causes a loss of rotor speed, leading to incomplete threshing and increased grain loss. The original belt is constructed to match the pulley groove profile and tension characteristics of the original assembly, ensuring proper belt-to-pulley contact without excessive heat buildup. When replacing, verify the belt is fully seated in all pulley grooves and adjust the tensioner to the specified deflection.