. The locomotive engineer . When the retaining valve is cut inand brakes released, action of theretaining valve retains about 20pound* pressure in brake cylinder, prevents that amount from escap-ing into atmosphere. Retaining thisamount keeps piston in action, sothai brake shoes rest fairly againstthe wheels, and exert a moderatebraking power, whileengineerre-clmrges auxiliariesfor renewed aclion in effective power for slopping. In ordinary service Ihe retaining valves are notused. In mountain scrricc, before descendinggrades, they are cut in by trainmen, and when footof hill is reached t
. The locomotive engineer . When the retaining valve is cut inand brakes released, action of theretaining valve retains about 20pound* pressure in brake cylinder, prevents that amount from escap-ing into atmosphere. Retaining thisamount keeps piston in action, sothai brake shoes rest fairly againstthe wheels, and exert a moderatebraking power, whileengineerre-clmrges auxiliariesfor renewed aclion in effective power for slopping. In ordinary service Ihe retaining valves are notused. In mountain scrricc, before descendinggrades, they are cut in by trainmen, and when footof hill is reached they are cutout. The relaining valves ari huatcd. on some end of platform on passinger cars, so thatthey can he lianilled without^ getting off (he cars;on some freight cars they urolocaled near the run-ning boanl dose lo roof of car. When located in such ))laces, and air having to exhausi from brake cylinder through such a longline of piping, there is reason to fear retarded ex-haust, and some trouble in cnnsequcn
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1888
