Air Brakes and Train Handling Rules - Alaska Railroad
Air Brakes and Train Handling Rules - Alaska Railroad Air Brakes and Train Handling Rules - Alaska Railroad
66 Locomotive Equipment and ComponentsThe MU-2A valve has two positions:LEAD or DEAD. Engages control of the independent brakes on asingle locomotive or on the controlling locomotive of a multipleunit consist.Use LEAD or DEAD when a locomotive is hauled dead-in-train.TRAIL. Disconnects control of the independent brakes from theindependent brake valve.Use TRAIL when a locomotive is trailing in a multiple unitconsist. Move this valve to the position that indicates the locomotivebrake equipment type on the lead locomotive.66.4 Electronic Alertness DeviceAn electronic alertness device stops the train with a service ratebrake application if the engineer does not respond properly. It functionsas follows:• The device begins functioning when locomotive brake cylinderpressure falls below 25 psi.• At this point, the device monitors the operator’s alertness.• It resets when the operator changes the position of or operatesone of these locomotive controls:— Throttle— Horn— Dynamic brake— Device reset button— Automatic brake valve application— Independent brake valve application• If the device is not reset within the reset cycle identified inRule 66.4.1, Intervals Between Resets:— A warning light flashes— A warning horn sounds off and on for 10 seconds, and thencontinuously for 10 secondsJune 1, 1996 ARRC Air Brakes and Train Handling Manual 66-7
66 Locomotive Equipment and Components• If the device is not reset within 20 seconds after the warninglight and horn begin operating, the train brakes will automaticallybe applied at a service rate.66.4.1 Intervals Between ResetsTable 66-A lists reset times for the electronic alertness device.Train SpeedTime Between Cycles0 to 49 MPH 60 seconds50 to 59 MPH 48 seconds60 to 71 MPH 40 seconds72 MPH or above 5 seconds or continuous (Overspeed)Table 66-A. Reset Times For Electronic Alertness Device.66.4.2 Moving Unattended Locomotive EquippedWith Electronic Alertness DeviceUse this procedure to move an unattended locomotive equipped withan electronic alertness device when:• The brake pipe is not connected and charged on the unattendedlocomotive.• The device is not deactivated on the unattended locomotive.To move the locomotive:1. Cut in the automatic brake valve.2. Move the automatic brake handle to SUPPRESSION.3. Release the locomotive brakes completely by actuating after:a. Independent brake is cut in.b. Brake pipe pressure is reduced.c. Exhaust has stopped.66-8 ARRC Air Brakes and Train Handling Manual June 1, 1996
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66 Locomotive Equipment <strong>and</strong> Components• If the device is not reset within 20 seconds after the warninglight <strong>and</strong> horn begin operating, the train brakes will automaticallybe applied at a service rate.66.4.1 Intervals Between ResetsTable 66-A lists reset times for the electronic alertness device.<strong>Train</strong> SpeedTime Between Cycles0 to 49 MPH 60 seconds50 to 59 MPH 48 seconds60 to 71 MPH 40 seconds72 MPH or above 5 seconds or continuous (Overspeed)Table 66-A. Reset Times For Electronic Alertness Device.66.4.2 Moving Unattended Locomotive EquippedWith Electronic Alertness DeviceUse this procedure to move an unattended locomotive equipped withan electronic alertness device when:• The brake pipe is not connected <strong>and</strong> charged on the unattendedlocomotive.• The device is not deactivated on the unattended locomotive.To move the locomotive:1. Cut in the automatic brake valve.2. Move the automatic brake h<strong>and</strong>le to SUPPRESSION.3. Release the locomotive brakes completely by actuating after:a. Independent brake is cut in.b. Brake pipe pressure is reduced.c. Exhaust has stopped.66-8 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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