This V-belt transmits drive from the engine to the hydrostatic or mechanical ground-drive system of the parent combine harvester. It sits in the primary drive loop, connecting the engine output pulley to the gearbox or pump input pulley that controls forward and reverse travel. A worn or slipping belt reduces ground speed consistency under load, causing hesitation during threshing and unloading. Gates manufactures this belt to match the original cross-section and cord construction, so it seats correctly in the pulley grooves without requiring tensioner adjustment beyond the standard range. On replacement, verify belt tension and pulley alignment per the service manual.