This V-belt transmits drive from the engine pulley to the cleaning-shoe mechanism on the parent combine. It is a single-rib, classical-section belt that runs in a dedicated pulley groove on the header drive system. A worn or slipping belt reduces cleaning-fan speed and sieve oscillation, leading to incomplete grain separation and increased losses out the rear of the machine. The belt is manufactured by Gates to match the original cross-section and length, so it seats correctly in the pulley groove without requiring tensioner adjustment beyond the standard range. On installation, verify the belt runs in the correct rotation direction and tension it to the manufacturer's specification.