Air Brakes and Train Handling Rules - Alaska Railroad

Control ValveGlossaryThe valve on locomotives and cars that charges reservoirs andapplies or releases brake cylinder pressure in response to changesin brake pipe pressure.Cutout Cock or ValveA device used to cut in or cut out certain air brake functions. Toopen (cut in), move the handle at a right angle to the pipe. Toclose (cut out), move the handle in line with the pipe.Cycle BrakingThe process of applying, releasing, and reapplying train brakesto control speed without completely recharging the train brakesystem.Dead Engine DeviceA device near the locomotive control valve used when a locomotiveunit is handled dead-in-train (hauled like a car). When thedead engine cutout cock is opened, the No. 2 main reservoir ischarged from the brake pipe to operate the engine brakes.Dead-In-TrainHauling locomotive(s) in a train without the MU air hosescoupled and cut in.Draft ForcePulling force (tension) on couplers and draft gear during a slackstretched condition.Draft GearA cushioning device that transmits draft or buff forces betweencoupler and car or locomotive frame.June 1, 1996 ARRC Air Brakes and Train Handling Manual G-5