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10 Cards in this Set
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- Back
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When are brake valve tests conducted? |
The 26L automatic brake valve must always be tested before: - A locomotive so fitted enters service or - Whenever a fault with the brake valve or it’s associated equipment is detected or suspected The driver must note the result from each step of the testing procedure and report to maintenance staff any defects or deficiency detected. |
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What is the procedure to test the 26L brake equipment? |
Prior to conducting the brake valve test the driver must ensure that: - The locomotive handbrake is applied - The brake valve cut off valve is set in the IN position - The MU2A valve is in the LEAD or DEAD position (IN) - The automatic brake valve is in the RELEASE position - The independent brake valve is in the RELEASE position - The reverser key is placed in direction (to acknowledge VC) Prior to conducting the test the driver must also note that the: - main reservoir pressure is between 750 and 850 KPA - equalising reservoir gauge is indicating 500 KPA - brake pipe pressure gauge is indicating 500 KPA - brake cylinder pressure gauge is indicating zero - brake cylinder pressure warning light is extinguished - Needles at the brake pipe flowmeter are close together Brake valve emergency cock The driver must first open the brake pipe emergency cock and observe the orange pointer on the brake pipe airflow indicator gauge fall and hear the flow of air. Close emergency cock and note brake pipe pressure is quickly restored and flow meter needles align. Minimum reduction feature Place the automatic brake valve handle into the MINIMUM REDUCTION position and observe that: - equalising reservoir pressure falls to approximately 450 KPA - brake pipe pressure falls to approximately 450 KPA - brake cylinder pressure rises and - The brake cylinder warning light illuminates Equalising Reservoir Charging Check Valve Move the brake handle from MINIMUM REDUCTION to the SERVICE ZONE and reduce brake pipe pressure by a further 25KPA. Driver to observe: - brake pipe pressure falls to approximately 425KPA After 10 seconds the driver must: - return the handle to the MINIMUM REDUCTION position and observe the brake pipe pressure gauge for 30 seconds. If there is an increase in brake pipe pressure it indicates that the equalising reservoir charging check valve is leaking and could result in an unintentional release of the train brakes. Loco must not enter service-DISABLED. Full service position Move the brake handle to the FULL SERVICE position and ensure that: - Equalising reservoir and brake pipe pressure full to approximately 325KPA. - brake cylinder pressure increases to 390 to 420 KPA Brake Pipe Leakage Test-brake valve test Put the automatic brake valve in the FULL SERVICE position and when the brake pipe air has ceased to exhaust, the driver can move the brake valve, cut out valve, to the OUT position and observe the brake pipe and brake cylinder pressure readings over a period of one minute. Brake pipe pressure must not: - fall in excess of 35KPA - Rise in excess of 18 KPA Brake cylinder pressure must not leak: - in excess of 35KPA Return the brake valve, cut off valve, to the IN position. Note: If the brake valve fails in the above leakage rates the loco must not enter service until fault is rectified. Emergency position Place the automatic brake handle into the emergency position and observe brake pipe pressure quickly full to zero equalising reservoir air pressure shall also fall to zero. Release position Place the automatic brake into the RELEASE position and observe that: - brake pipe pressure rises quickly to 500 KPA - equalising reservoir pressure rises to 500 KPA at a retarded rate - brake cylinder pressure falls to zero - brake cylinder warning light extinguishes INDEPENDENT BRAKE VALVE TESTS Independent application Place the independent brake handle midway through the APPLICATION ZONE and ensure that: - brake cylinder pressure increases and steadies - brake cylinder warning light illuminates Move the independent handle to the FULL APPLICATION position and ensure that brake cylinder pressure increases to and remains at 310 KPA. Independent release Move the independent brake handle to the RELEASE position and ensure that: - brake cylinder pressure falls to zero - brake cylinder warning light extinguishes Independent release - following automatic application First initiate, using the auto brake handle, a brake pipe reduction of 150 KPA (full equalising application-FULL SERVICE) and ensure that: - brake cylinder pressure rises and steadies Depress the independent brake valve handle (4 seconds -> 0) in the release position and ensure that: - brake cylinder pressure falls to zero - brake cylinder warning light extinguishes |
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What is the procedure to test the dynamic brake interlock (magnet valve)? |
Apply a brake pipe reduction of 150kPa and ensure: - brake cylinder pressure rises and steadies Reverser into direction Apply the dynamic brake (move dynamic brake handle to SETUP position and wait for 10 seconds, then apply the dynamic brake past SETUP) and ensure: - brake cylinder pressure falls to zero - Diesel engine revolutions increase from idle to equal notch 4 |
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What is the procedure to test the power knockout switch? |
With the dynamic brake still applied the driver must place the automatic brake valve into the EMERGENCY/HANDLE OFF (HO-shows this decrease in slower motion) position and drain the brake pipe to zero. The driver must note: - loco brakes reapply when the brake pipe reduces below 240kpa and then move auto brake to RELEASE position. When brake pipe increases to 320kPa the dyno kicks back in. - diesel engine revs return to idle - brake cylinder pressure to 390-410 kPa - brake cylinder light illuminates At the completion of this test the driver must: - release the dynamic brake - place the independent brake valve handle in the FULL APPLICATION position - return the auto brake valve handle to the RELEASE position |
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What is the procedure to report airbrake defects at the locomotive Depot? |
If the loco fails the 26L brake valve testing it must not enter service until the fault is rectified. The maintenance supervisor must be notified via the train controller. |
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What is the procedure to report an air brake defect during train running? |
If the driver encounters a brake valve defect in train running the train controller must be notified of the circumstances. Record the details of the defect in the loco logbook. The train controller and the driver must reach an understanding on any further working of the train. The driver must submit an irregularity report at the end of the shift |
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TPWS equipment |
Ensure the following lights on the TPWS panel have illuminated: - brake demand ACK button - TI fault light - Train stop override button Driver must wait three seconds (or six warning beeps) for the red power up ACK light to illuminate and then press the brake demand ACK button. If no fault is detected all lights on the TPWS panel should extinguish. If a TPWS fault is detected the TI fault light shall remain illuminated. |
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How do you test the VC? |
Put the automatic brake and the independent brake into the RELEASE positions. - Wait for the VC to activate and then cancel it. - Wait for the VC to activate and then don’t cancel it. - after ‘so long’ the VC will activate an emergency application of the brakes. Driver to observe: - brake pipe pressure reduces - brake cylinder pressure increases - main res decreases as it’s trying to maintain the brake pipe pressure but the ‘maintaining feature’ doesn’t apply when the VC applies the emergency brakes - flow meter needles separate as the main res tries to maintain brake pipe pressure - brake cylinder warning light illuminated Driver to move automatic brake handle to EMERGENCY position to stop the flow of main res air into the brake pipe. When the VC light steadies, push the VC button to cancel it. Move the auto brake handle back to the RELEASE position. |
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How do you complete an exhaust test? |
Exhaust Test - to be completed in Cab 1 and record it in the log/fault book. Conduct an exhaust test and a power revs test. Exhaust test is carried out to clear the loco exhaust system of matter which has accumulated in the system-observe the exhaust for any fire hazard. - with the generator field switch off and reverser in neutral, move the throttle to notch eight pausing in each notch long enough for revs to steady - run the engine in notch 8 for about 10 seconds then return throttle to idle, pausing long enough in each notch for revs to steady - during the test observe exhaust for any fire hazard such as excessive smoke, sparks, cinders etc - if any fire hazard is noted, the driver must immediately advise maintenance staff |
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Test for Amps-ensuring loco has gone back to powering mode from dynamic braking. |
After dynamic brake test: - shut dynamic brake OFF - ind brake to FULL APPLICATION & auto brake to RELEASE - reverser in direction - move throttle to notch 1-note amp meter increases, no rev increase, N2 amp and rev increase and immediately move throttle to idle - amp meter returns to 0 - reverser in other direction and repeat steps |
