Air Brakes and Train Handling Rules - Alaska Railroad
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Air Brakes and Train Handling Rules - Alaska Railroad

Air Brakes and Train Handling Rules - Alaska Railroad Air Brakes and Train Handling Rules - Alaska Railroad

akrr.com
12.07.2015 Views

67 Car Equipment and ComponentsOn the TTOX AIR ACTUATOR single wheel truck air brakesystem, piston travel limits are:Maximum Piston Travel Without Brake Shoe RenewalRange of TravelRepair Track and Reset Range 7" ± 1/4"Initial Terminal OperatingRangeIntermediate PointsTTOX AIR ACTUATORWith the brakes applied, shoes mustbe against the wheels and theindicator pointed to the ON position.With the brakes applied, shoes mustbe against the wheels and theindicator pointed to the ON position.Table 67-L. TTOX AIR ACTUATOR Piston Travel Limits.67.16 Full-Service and Emergency BrakeCylinder Equalization Pressures OnFreight CarsUse Table 67-M to determine full-service and emergency brakecylinder equalization pressures.Charge InSystemEqualization Pressures (in psi)Full ServiceReductionFull ServiceBrake CylinderPressureEmergencyBrake CylinderPressure70 20 50 6080 23 57 6990 26 64 77100 29 71 85110 32 78 93Table 67-M. Full-Service and Emergency Brake Cylinder EqualizationPressures.67-30 ARRC Air Brakes and Train Handling Manual June 1, 1996

67.17 Train Brake Releases67 Car Equipment and ComponentsTrain brake release times depend on:• Train length• Brake pipe leakage• Amount of brake pipe reduction being restored• Type of air brake equipment (AB, ABD, or ABDW)67.17.1 Time Chart For Starting Release On Last CarUse Table 67-N to determine the time required to begin the release ofa 10 psi brake pipe reduction if:• Initial brake system pressure is 90 psi.• Minimum brake pipe leakage is present.• Train is equipped with ABD or ABDW control valves.Train LengthTime Required To Start theRelease On Last Car2,500 feet 4.5 seconds5,000 feet 8.4 seconds7,500 feet 13.5 secondsTable 67-N. Time Chart For Starting Release On Last Car.June 1, 1996 ARRC Air Brakes and Train Handling Manual 67-31

67 Car Equipment <strong>and</strong> ComponentsOn the TTOX AIR ACTUATOR single wheel truck air brakesystem, piston travel limits are:Maximum Piston Travel Without Brake Shoe RenewalRange of TravelRepair Track <strong>and</strong> Reset Range 7" ± 1/4"Initial Terminal OperatingRangeIntermediate PointsTTOX AIR ACTUATORWith the brakes applied, shoes mustbe against the wheels <strong>and</strong> theindicator pointed to the ON position.With the brakes applied, shoes mustbe against the wheels <strong>and</strong> theindicator pointed to the ON position.Table 67-L. TTOX AIR ACTUATOR Piston Travel Limits.67.16 Full-Service <strong>and</strong> Emergency BrakeCylinder Equalization Pressures OnFreight CarsUse Table 67-M to determine full-service <strong>and</strong> emergency brakecylinder equalization pressures.Charge InSystemEqualization Pressures (in psi)Full ServiceReductionFull ServiceBrake CylinderPressureEmergencyBrake CylinderPressure70 20 50 6080 23 57 6990 26 64 77100 29 71 85110 32 78 93Table 67-M. Full-Service <strong>and</strong> Emergency Brake Cylinder EqualizationPressures.67-30 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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