Comeng Spring Park Brake and air pressures Flashcards
What wheel numbers are the spring park brake fitted too?
Wheels 1 3 5 and 7 on motor cars only
How are spring park brakes released in normal operation?
Main res air compresses the spring releasing the brake
What spring park brakes are applied when buttons are pressed from the van area?
Local spring park brake
What is needed to energise the train lined spring park brakes button?
Atleast one pantograph and one motor alternator
Can the local spring park brake be released without overhead power being present?
Yes if you have enough main res pressure
When will all park brakes automatically apply?
The reverser is switched to off 60 seconds after the reverser is in neutral Loss of overhead 60 seconds after MA has started Train remains under 8km/h for 60 seconds
How would you manually release a knor spring park brake?
Turning the nob anti clockwise, 1 turn
Can you manually apply a spring park brake on a Knor comeng?
No
How do you manually release a spring park brake on a west code
Turn the hexagonal nut 6-8 turns anti clockwise
How do you manually apply a west code spring park brake?
By turning the hexagonal nob 40-60 turns in a clockwise direction
Can you manually release a spring park brake if main res air pressure is applied to the spring park brake?
No because it can cause serious damage to the mechanism
How long does it take for the spring park brake train lines buttons to become energised after the MA has been turned on?
60 seconds
What is the optimum main res pressure?
585-725kpa
What should the pressure be in the brake pipe/auto air regulating valve after application?
380-410kpa
What pressure should be in the brake pipe/auto air regulating valve before application?
550kpa
What should the pressure be in the brake pipe after a full service application?
380-410
What should the pressure be in the brake cylinder after full service application on the auto air?
275kpa
What should the pressure be in the control reservoir, the trip and line breaker case?
490-510kpa
What should the pressure be for a VICERS reset or trip reset?
Under 25kpa
At what pressure is needed for the control governor to close?
400-430
When doing a trip test, what should the brake pipe pressure drop below?
150KPA
When doing a continuity test, what should the brake pipe pressure fall below?
300KPA
What is the control res minimum pressure?
490-510kpa
What pressure does the control governor open?
310-340kpa
What pressure should the control governor close?
400-430kpa
What should the bp fall for a safety apparatus test? (Hand and foot pilot valve)
290kpa
What is the brake cylinder pressure in step 7 on the EP brake?
250kpa
What is absolute minimum brake pipe pressure?
425KPA
What runs off main res pressure?
Brake controller Doors Airbags Whistle Spring park brakes
