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Air Brakes and Train Handling Rules - Alaska Railroad

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67 Car Equipment <strong>and</strong> ComponentsNOTE: Piston travel is measured from the front face of thecylinder to the edge of the push rod connection pin.On WABCO TMX truck mounted air brake cylinders, one brakecylinder is mounted to one brake beam within each truck. Newmodels have a piston travel indicator on the brake cylinder.Maximum stroke is 4-3/4 inches.Truck 70 Ton 100 Ton 100/125 TonCylinder Diameter 7" to 8" 8" 9-1/4"Table 67-J. WABCO TMX Cylinder Diameter.Piston travel limits are:Maximum Piston Travel Without Brake Shoe RenewalRange of TravelWABCO TMXRepair Track <strong>and</strong> Reset Range 2" ± 1/4"Initial Terminal Operating Range 1-1/2" to 3"Intermediate Points 3-1/4"Table 67-K. WABCO TMX Piston Travel Limits.67-28 ARRC <strong>Air</strong> <strong>Brakes</strong> <strong>and</strong> <strong>Train</strong> H<strong>and</strong>ling Manual June 1, 1996

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