This multi-ribbed belt drives the alternator from the engine crankshaft on the host tractor. It is a 6PK profile belt, meaning it has six longitudinal ribs that engage with matching pulleys to transmit torque without slipping. The belt sits in the accessory drive system, where it also often drives the cooling fan or hydraulic pump on the same circuit. A worn belt produces a squealing noise under load and can cause the alternator to undercharge the battery. The manufacturer machines the belt to match the original pitch length so that the tensioner operates within its designed travel range. On installation, verify the belt routing matches the pulley layout and adjust the tensioner to the specified deflection.