. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . wooden washerhas been removed and the pressurechamber recharged, close the stop cockin the distributing valve supply pipe,place the independent brake valve ban- Test 5.—After test No. 4, remove theplug from the distributing valve exhaustport and use the brake, making light,independent applications. The hands onthe gauges showing application cham-ber pressure and brake cylinder pres-sure should rise together and show thesame pressures simultaneously. In theevent of a failure to do so the diffe
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . wooden washerhas been removed and the pressurechamber recharged, close the stop cockin the distributing valve supply pipe,place the independent brake valve ban- Test 5.—After test No. 4, remove theplug from the distributing valve exhaustport and use the brake, making light,independent applications. The hands onthe gauges showing application cham-ber pressure and brake cylinder pres-sure should rise together and show thesame pressures simultaneously. In theevent of a failure to do so the differ-ences in pressure show the amount offrictional resistance encountered inmoving the application piston and lied \ alves. Test 6.—Release with the independ-ent valve and operate the distributingvalve with light reductions from theautomatic brake valve. The hands onthe gauges showing brake pipe pres-sure and pressure chamber pressureshould fall together, remaining at thesame figure until the point of equaliza-tion is reached. Failure to do so indi-cates undue resistance to movement in. AIR PUMP AND BRAKE VALVE TEST RACK. die in application position and close thestop cock in the brake cylinder brakepipe. The brake cylinder gauge handrising will show leakage past the appli-cation piston packing leather and ring:4th test.—There being no leakage pastthe leather, open the stop cock in thebrake cylinder pipe, then slowly openthe stop cock in the supply pipe, whichwill fill the brake cylinder; then screwthe *4-in. pipe plug in the exhaust portof the distributing valve and place theindependent brake valve in runningposition. A blow at the emergency ex-haust port of the automatic brake valve, the equalizing portion of the distribut-ing valve. The distance the brake pipegauge hand falls before the pressurechamber hand starts shows approxi-mately the amount of frictional resist-ance. Test 7.—Place the automatic brakevalve in service position until equaliz-ing reservoir pr
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