. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . servoir back into chamberD as fast as the air could escape fromthis chamber through the small prelim- Air Brake Questions and Answers DRIVER BRAKE CUT-OUT. C22) C. E. of Lindale, Ohio,writes : 1. The new engines which we have re-cently received from the Brooks Loco-motive Works are equipped with thenew distributing valve, which takes carenf ,t11 the brake cylinders on the engineand tender. Now, I should like toknow what to do to cut out the driverbrake in case it was necessary to do so?.\
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . servoir back into chamberD as fast as the air could escape fromthis chamber through the small prelim- Air Brake Questions and Answers DRIVER BRAKE CUT-OUT. C22) C. E. of Lindale, Ohio,writes : 1. The new engines which we have re-cently received from the Brooks Loco-motive Works are equipped with thenew distributing valve, which takes carenf ,t11 the brake cylinders on the engineand tender. Now, I should like toknow what to do to cut out the driverbrake in case it was necessary to do so?.\.—Close the 5^ in. cut-out cock in thebranch pipe leading from the brake pipeto the distributing valve and place thehandle of the independent brake valvein release position. See piping di-agram, published elsewhere in this num-ber of the new engine and tender equip-ment. 2. In cases of double heading with en-gines that have the new style brake, howdo you cut out the brake valves on thesecond engine? A.—Close the doublestop cock just below the brake valveiuit as with the older equipment, and in. DISTRIBUTING VALVE inary exhaust port. This would allowthe black hand to drop to the zero markor near it. The pressure thus suddenlyreduced in chamber D, on one side ofthe restriction, which was probably agasket improperly applied in the brakevalve union, would permit the pressurein the small reservoir to enlarge the re-stricted opening and allow the air to flowmore freely into chamber D, and hencesuddenly increase the pressure therein,causing the black hand to move backclose to the 70 lb. mark on the gauge,and this operation could repeat itselfseveral times during the time the handleremained in service position, causing theblack gauge hand to move up and downas noticed. However, there must have been, withthis action an intermittent exhaust ofbrake pipe air at the brake valve ser-vice exhaust elbow fitting, of which yourletter makes no mention. 78 RAILWAY AND LOCOMOTIVE ENGINEERING F
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