This V-belt transmits drive torque from the engine pulley to the driven components in the harvester's drive system. It sits in the belt path between the crankshaft and the primary sheave, maintaining tension to prevent slip under variable load. A worn or glazed belt causes speed loss at the driven shaft, reducing throughput and increasing the risk of belt failure. This original belt is molded to the same cross-section and length as the factory-installed belt, preserving the correct tension range without requiring shimming or offset pulleys. On installation, verify the belt sits fully in the pulley grooves and adjust tension to the specified deflection.