Supervises and coordinates activities of workers engaged in testing durability of standard and bulletproof tires and inner tubes, caterpillar tracks, and bulletproof gas tanks for military vehicles, performing duties as described under supervisor.
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Supervises and coordinates activities of workers engaged in servicing and repairing automobile and truck tires and tubes: examines damaged, defective, or flat tires to determine feasibility of repair and assigns workers to tasks, such as removing nails, changing tubes, installing boots, and changing tires on vehicles. May direct activities of workers engaged in repairing, relining, and adjusting vehicle brakes. Performs other duties as described under supervisor.
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Services and repairs storage batteries maintained in generating plants and substations as electric power source for lighting purposes and operation of motors, switchgear, and electric appliances during interruptions of normal power supply: tests condition of electrolyte in each cell, using hydrometer and thermometer, and adds water or acid, according to specifications. Measures electrical energy level of batteries to ensure that potential energy meets minimum requirements. Connects batteries to portable charger and adjusts rheostat to raise energy level of undercharged cells. Replaces deteriorated plates in cells and cleans out sediment that accumulates in bottom of battery case. Compiles operating and maintenance records.
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Inspects cured tires to ensure conformance to standards: lifts tire manually or with hoist onto turntable. Revolves table to inspect for sidewall cracks, foreign material, and blisters. Feels beads to detect kinks and feels inner surface of tire to detect spread cords, ply separations, or buckles. May trim toe of bead and mold overflow with knife tire trimmer, hand. Marks defects and sorts tires for removal to balance and label, repair, or classification sections. May use fluoroscope or camera to detect flaws in tires. May inspect inner tubes. May be designated according to type of tire inspected as passenger-tire inspector; truck-tire inspector.
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Tests storage batteries, using electric testing instruments: sets dials on testing instruments according to battery voltage. Places positive and negative wired plugs on posts and intercell-connector terminals of corresponding polarity and observes indicator on instrument that measures resistance capacity in terms of pass or reject. Tests rejected batteries to determine specific defects, using voltmeter. Computes comparative figures and test data to determine deficiencies and attaches slip to battery indicating type of defect. May test battery assemblies on conveyor line. May test batteries used in field equipment and be designated battery tester, field.
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Assembles hard rubber tires and wheel rims for articles, such as lawn mowers and baby carriages: places rubber tire into jaws of spreading device and depresses pedal to close jaws and stretch tire. Positions wheel rim on spindle mandrel at center of tire. Pushes button to open jaws that release tire onto rim and removes wheel from spreading device.
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