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Air Brakes and Train Handling Rules - Alaska Railroad

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68 EOT Telemetry Devices68.9 Digitair Troubleshooting68.9.1 Troubleshooting the EOT UnitWhen an EOT unit leaves the shop or is installed on the rear car, testthe unit according to Rule 68.7.3C. Use the results of the test <strong>and</strong>Table 68-H to diagnose a faulty EOT unit so it can be returned to theshop for repair.EOT Unit Troubleshooting ChartSymptom Probable Causes Remedies1. EOT does not turnon when TEST ispressed (see Rule68.7.3C).2. EOT does not turnon when air isapplied.a. Faulty battery Change battery.b. Battery not installed Install battery.c. EOT not jumpered Consult optionnumbers on the label<strong>and</strong> refer to theordering information.a. Faulty battery Change battery.b. Battery not installed Install battery.c. <strong>Air</strong> hose clogged Try to clear the airhose.d. Faulty pressurelimitswitchReplace the EOT.e. Blown fuse Replace unit.68-34 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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