This V-belt transmits power from the engine pulley to the header drive system of a combine harvester. It runs in a single-groove pulley set and drives the rotating components of the cutting platform. A worn or stretched belt slips under load, reducing header speed and causing uneven crop intake. The belt is constructed to match the original cross-section profile, which keeps it seated in the pulley groove at the correct tension. When replacing, ensure the belt is tensioned to the manufacturer's specification and that the pulley faces are clean and free of debris.