. Railway mechanical engineer . ration tlie rods are set on a rack at the west end of therod department and the bushings are fitted on a small bor-ing mill. After the bushings are bored and pressed in, therods are fitted together and trammed for length, beingchanged by the blacksmitli if necessary. Knuckle joint pinsand bushings and crosshead pins are turned up rough ona 7j2-in. Libby high duty turret lathe. The sides of mainrod straps are trued up on the surface grinder and mainrod brasses are shaped to size on two 28-in. shapers withspecial attachments and bored out on a 36-in. Bullard ver-t
. Railway mechanical engineer . ration tlie rods are set on a rack at the west end of therod department and the bushings are fitted on a small bor-ing mill. After the bushings are bored and pressed in, therods are fitted together and trammed for length, beingchanged by the blacksmitli if necessary. Knuckle joint pinsand bushings and crosshead pins are turned up rough ona 7j2-in. Libby high duty turret lathe. The sides of mainrod straps are trued up on the surface grinder and mainrod brasses are shaped to size on two 28-in. shapers withspecial attachments and bored out on a 36-in. Bullard ver-tical turret lathe. Side rod bushings are pressed in by a100-ton hydraulic press. Valve Motion.—The diversity of work involved in therepairing of valve motion makes it difficult to establish arouting for the parts, except in a general way. However, themajority of parts can be finished on one or two machines andas they are relatively light the handling presents no specialdifficulty. The rocker arms, lift shafts, bushings, valve. Plan of Boiler Shop, Showing Location of Machine Tools. lateral play of the driving boxes is governed by the thicknessof the hub liner on the wheel center. The flanges on eachpair of driving boxes are made the same thickness. Theman applying the hub plates takes this dimension off the boxwith the thickness of tlie shoe and wedge flanges and the dis-tance over the frames and has the brass hub liners turned tothe proper thickness to give J^ in. lateral clearance. Eachhalf of the hub plate is put on with four wrought iron pinshaving a straight fit in the wheel center and a counter-sunkhead. When the driving boxes are worn down ^-g in. theface is counter-bored and a 3^-in. sheet steel liner is put onwith countersunk head bolts. Shoes and Wedges.—.\\\ new shoes and wedges are fin-ished on a planer near the driving box department. Whenthese parts come from the engine after being laid off, tliey arefaced on a planer in the light machine bay near the west end
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
