. The carman's helper . pply the journal boxes, brassesand wedges and hold the box level while the wheelsare rolled into position. Now lower the two trackjacks, apply the t\vo box bolts and repack the the truck under the car and let the car down afterwhich the brake rigging may be connected again. The thing to remember is, keep everything clean,and be sure that all parts of the journal box are incorrect position before leaving the car. Many hot boxeshave been caused by repairmen not looking to see ifbrasses and wedges were in the proper place. Jacking Up Cars for Repairs—After raisin
. The carman's helper . pply the journal boxes, brassesand wedges and hold the box level while the wheelsare rolled into position. Now lower the two trackjacks, apply the t\vo box bolts and repack the the truck under the car and let the car down afterwhich the brake rigging may be connected again. The thing to remember is, keep everything clean,and be sure that all parts of the journal box are incorrect position before leaving the car. Many hot boxeshave been caused by repairmen not looking to see ifbrasses and wedges were in the proper place. Jacking Up Cars for Repairs—After raising a caron jacks the only safe practice is to set a trestle underihe car and lower it until a proportion of the carsweight rests on the trestle. Then if the jack fails to 57 THE CARMANS HELPER sustain the weight imposed on it, the trestle will holdthe car steady. Wheels—There are two kinds of car wheels in useat the present day; chilled cast iron wheels and steelwheels. There are three types of steel wheels; the cast. Trestles for Supporting Cars steel wheel, the forged or rolled steel wheel, and thesteel-tired wheel. The last mentioned is gradually be-coming a thing of the past. The chilled iron wheel wasthe first used, and is still used more than any otheron account of its low first cost. Wheel Failures—Wheel failures or defects whichjustify renewals are as follows: Sharp flange .or worn flange, shelled out, burnt chill,either from sliding or from brake application, worntread, worn through the chill, chipped flange, chipped 58 THE SMALL REPAIR POINT rim, etc. The most common causes necessitating re-moval are worn flanges; next, worn tread, tread wornhollow; then, brake burn, brake slide, shelled out, wornthrough tread and cracked flanges. Worn flanges are often caused by mismating of wheelswhen first mounted. Wheels should not be mountedon an axle when tape size does not correspond. Atruck out of square will also cause sharp flanges. Sidebearings exert an influence on sh
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectrailroa, bookyear1920
