This V-belt transmits drive torque from the engine to the walker assembly in a combine harvester. It sits on the drive-system pulley, routing power to the rotating walker crankshaft that separates grain from material other than grain. A worn or slack belt causes walker speed to drop, reducing separation efficiency and increasing losses over the shoe. The belt is a single-rib profile, matching the original pulley groove geometry so no re-grooving or shimming is needed. On installation, check belt tension to the manufacturer's specification and replace any worn pulley sheaves to prevent premature belt wear.