This rubber cover shields the cleaning-drive belt and pulley assembly from crop debris and dust ingress. It mounts over the drive area on the cleaning unit of the parent combine, preventing material buildup that could cause belt slippage or premature wear. The cover is secured in place along its length and should be inspected for cracks or tears each season; a damaged cover allows chaff to pack around the drive components, increasing friction and reducing cleaning-fan speed. When reinstalling, ensure the cover is aligned with the mounting slots so it does not contact the moving belt.