This V-belt transmits power from the engine drive pulley to the air compressor input pulley. It sits in the drive system of the parent harvester, where it maintains the rotational speed required for the compressor to supply pressurized air to the pneumatic cleaning and conveying circuits. A worn or slipping belt reduces compressor output, which can cause uneven material flow through the cleaning shoe. The belt is a single-rib design, matching the original groove profile of the pulleys in the drive system. On installation, verify the belt is fully seated in all pulley grooves and adjust tension to the manufacturer's specification.