This “sled” slides beneath gravity hopper railcars for connection to a vacuum unloading system. Our railcar unloading sled is designed to mate to a gravity flow railcar equipped with a 32” x 24” centerflow enterprise gate. The unit is supplied with four casters to allow for positioning of the sled under the railcar discharge. Once in position the operator then raises the pan into position by manually actuating the air cylinders. Conveying rate from the railcar is controlled by manually adjustable feed tube and air intake assembly.