This V-belt drives the radiator fan from the engine crankshaft pulley. It sits inside the cowl assembly that directs airflow across the cooling core. A single-rib belt, it transmits torque through the pulley groove without slipping under load. A loose or glazed belt reduces fan speed, causing elevated coolant temperatures during heavy harvesting work. The belt is manufactured by Gates to match the original cross-section profile, which keeps the belt seated correctly in the pulley groove without requiring a tensioner adjustment beyond the standard range. On replacement, verify the belt rides flush with the pulley edges and tension to the manufacturer's specification.