This V-belt transmits drive from the engine to the sieve assembly in the cleaning shoe of the parent combine harvester. It connects the drive pulley to the sieve shaft, rotating the oscillating sieves that separate grain from chaff. A worn or slipping belt reduces sieve stroke speed, leading to incomplete material separation and increased grain loss out the rear of the machine. This is the original manufacturer's belt, cut to the same length and cross-section as the factory-installed belt so that tension and pulley wrap angle are maintained without adjustment. When replacing, ensure the belt seats fully in each pulley groove and that the tensioner is set to the specified deflection.