Air Brakes and Train Handling Rules - Alaska Railroad

66 Locomotive Equipment and Components66.4.3 Making Automatic Brake Pipe ReductionWith Device DeactivatedTo make an automatic brake pipe reduction with the electronicalertness device deactivated:1. Move the automatic brake handle toward CONTINUOUSSERVICE.2. To release the brake, move the automatic brake handle back toSUPPRESSION.66.4.4 Restoring Electronic Alertness Device ControlTo restore the electronic alertness device control:1. Cut out the automatic brake.2. Move the automatic brake handle to RELEASE.3. Adjust the regulating valve to the required pressure.4. Move the automatic brake handle to the desired position.5. Cut in the automatic brake.66.5 Overspeed ControlThe overspeed control prevents the train from running at speedshigher than the safe mechanical limits of the traction motors. Itfunctions as follows:• If train speed increases to an unsafe level, the safety controldevice sounds a warning.• If the train does not slow within 6 to 12 seconds of the firstwarning sound, the overspeed control device applies the trainbrakes and trips the PCS.June 1, 1996 ARRC Air Brakes and Train Handling Manual 66-9