. The Street railway journal . be the repairs to the wheelsas they are made in the repair shop, which is on the groundfloor of the Sullivan Square car house. When the trucks reachthe shop floor, as described above, they are run off the elevatorplatform to one side or to the other, depending upon whetherthey are motor or trail trucks. If the former, the truck andmotors are raised by a pneumatic hoist and the axle and wheelsare run out and replaced with another pair. If the wheels areto be reground, they are taken to a gang of four Springfieldgrinders, where they are ground down about one-sixtee
. The Street railway journal . be the repairs to the wheelsas they are made in the repair shop, which is on the groundfloor of the Sullivan Square car house. When the trucks reachthe shop floor, as described above, they are run off the elevatorplatform to one side or to the other, depending upon whetherthey are motor or trail trucks. If the former, the truck andmotors are raised by a pneumatic hoist and the axle and wheelsare run out and replaced with another pair. If the wheels areto be reground, they are taken to a gang of four Springfieldgrinders, where they are ground down about one-sixteenth ofan inch in circumference. The wear on the elevated road isparticularly on the tread of the wheel, and for this reason, as 466 STREET RAILWAY JOURNAL. [Vol. XXIII. No. 13. stated, the wheels have to be turned down about once in three hold the retaining rings together, see Fig. 1, the wheel is swung months to reduce the flange to the proper section. The lathe over the gas burner, shown at the side of the elevator in Fig. 6. FIG 8.—WHEEL LATHE WITH SECTIONAL GEAR, SHOWN WITH GEAR CASE RAISED used for this purpose is shown in Fig. 8, and is arranged forturning down two tires at once, with two tools on each wheels are brought to the lathe on the special truck shownin the foreground, and as thelathe is driven by gearing thegear is made with a sectionwhich can be lifted out and re-placed in order to insert the axleand wheels in the lathe. Asshown in the engraving the gearcase is raised to show the sec-tional gear and the removablesection is shown in the fore-ground. Two sizes of wheels are used,a 33-in. and a 31-in. wheel. Theformer is allowed to wear downto 303/2 ins. in diameter, and theother to 28 ins. in diameter be-fore being re-tired. From twoto three years are usually re-quired to wear out a wheel inthe tread. Owing to the dif-ference in diameters of partiallyworn wheels, it is, of course, es-sential for good electric motoroperation to exercise great carein mat
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
