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The cut-out pressure should be in accordance with the pressure setting of the piece number being used. (Common cut-out pressures are between 105-125 psi.) With the engine still running, make a series of brake applications to reduce the air pressure and observe at what pressure the governor cuts-in the compressor.
1 If the pressure in the train line is lower than that of the reservoir, the brake cylinder exhaust portal is closed and air from the car's reservoir is fed into the brake cylinder to apply the brakes. 2  This action continues until equilibrium between the brake pipe pressure and reservoir pressure is achieved.uropean railway air brakes include the Kunze-Knorr brake (invented by Georg Knorr and manufactured by Knorr-Bremse) and the Oerlikon.