This V-belt drives the straw-walker mechanism in a grain harvester. It transmits torque from the drive pulley to the walker shaft, maintaining the oscillating motion that separates grain from straw. A worn or slipping belt reduces walker speed, leading to incomplete separation and increased grain loss in the tailings. The belt is constructed with a two-rib profile to match the pulleys on the original assembly, ensuring correct engagement and tension retention. On replacement, verify belt tension and alignment to prevent premature wear.