The design of the mechanism for opening and closing the chute doors of a rail car in a coke-quenching system is discussed. Modernization of the hydraulic system ensures uniform discharge of the quenched coke on the coke ramp and increases the working life of the main pump. Assessment of the performance of such hydraulic systems and pumping equipment is considered. New hydraulic drive systems for the pumping equipment are proposed, as well as individual mechanisms of the device.