. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . tely fitted with rings 6. Forthe best results, it is essential that the packing ring be installed with the square seg-ment of the ring near-est the wrist this is done, theangle portion is nextthe pressure end of thepiston, which is neces-sary in order that thering joints may lap insuch a way as to pre-vent leakage. To insure correct replacement of pistons and rings, a letter isstamped at the top of the outside flange of each cylinder, on theoutside f
. Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars . tely fitted with rings 6. Forthe best results, it is essential that the packing ring be installed with the square seg-ment of the ring near-est the wrist this is done, theangle portion is nextthe pressure end of thepiston, which is neces-sary in order that thering joints may lap insuch a way as to pre-vent leakage. To insure correct replacement of pistons and rings, a letter isstamped at the top of the outside flange of each cylinder, on theoutside face of each piston, and on the inside face of the joint of eachpacking ring segment. In addition to this letter, each packing ringsegment is also stamped. Connecting Rod Construction. The wrist pins 7 are of steel,hardened, ground, and secured in place by a set screw 30; a bronzebushing 8 in the connecting rod 9 works on them. The crank endof the connecting rod is lined, and has a strap 10 hinged at its lowerend and secured by an eyebolt 11 at the upper end. On this boltbetween the two parts are thin steel washers 12, which may be. Fig. 142. Westinghouse Type D-EG Motor-DrivenAir Compressor Suspended in Cradle under Car AIR BRAKES 183 removed as the bearing wears, and the strap then tightened downon the remaining ones and locked with the jam nut. The center hne of tlie c^ lindcr is a Httlc above the center hne of
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