This V-belt transmits power from the engine pulley to the driven pulley on the chopper’s main driveline. It is a single-rib, wrapped belt that sits in a matching pulley groove and relies on wedge action to transfer torque without slipping. A worn or glazed belt causes speed loss at the cutterhead, reducing throughput and increasing the risk of belt squeal under load. The belt is manufactured to the original cross-section profile, which maintains the correct contact angle in the pulley groove and prevents premature edge wear. On replacement, ensure the belt is tensioned to the manufacturer’s specification and that both pulleys are aligned in the same plane.