This multi-ribbed belt drives the alternator from the engine crankshaft on the host tractor. It sits in the front accessory drive loop, transmitting rotational force to the alternator pulley to maintain electrical system charging. A worn or glazed belt slips under load, causing the alternator output to drop and the battery to discharge during operation. The belt profile matches the pulley grooves of the original drive assembly, maintaining correct tension and alignment without requiring shimming or adapter pulleys. On replacement, verify the belt routing matches the original path and tension the idler pulley to the specified deflection.