Pulley Protection Plow Cleaners remove any material (large lumps of cargo or stray conveyor components) being carried on the belt’s return run before it gets caught between the tail pulley and the belt. On reversing belt conveyors or conveyors that suffer rollback, Diagonal Plow Tail Pulley Belt Cleaners use a rubber or urethane blade to direct the unwanted material off to one side regardless of which direction the belt rotates.