This multi-rib belt drives the alternator from the engine crankshaft, maintaining tension across the accessory drive system. It sits in the belt routing between the crankshaft pulley, alternator pulley, and any idler or tensioner pulleys in the loop. A slipping or worn belt reduces alternator output, causing a low-voltage warning or battery discharge under load. As an original AGCO part, the belt profile and effective length match the pulley groove geometry of the original drive system, so no adjustment of the tensioner range is needed. On replacement, inspect the tensioner and idler pulleys for bearing wear and replace the belt only with the correct profile for the pulley set.