Comeng Spring Park Brake and air pressures

Question 1

What wheel numbers are the spring park brake fitted too?

Answer 1

Wheels 1 3 5 and 7 on motor cars only

Question 2

How are spring park brakes released in normal operation?

Answer 2

Main res air compresses the spring releasing the brake

Question 3

What spring park brakes are applied when buttons are pressed from the van area?

Answer 3

Local spring park brake

Question 4

What is needed to energise the train lined spring park brakes button?

Answer 4

Atleast one pantograph and one motor alternator

Question 5

Can the local spring park brake be released without overhead power being present?

Answer 5

Yes if you have enough main res pressure

Question 6

When will all park brakes automatically apply?

Answer 6

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

Question 7

How would you manually release a knor spring park brake?

Answer 7

Turning the nob anti clockwise, 1 turn

Question 8

Can you manually apply a spring park brake on a Knor comeng?

Answer 8

No

Question 9

How do you manually release a spring park brake on a west code

Answer 9

Turn the hexagonal nut 6-8 turns anti clockwise

Question 10

How do you manually apply a west code spring park brake?

Answer 10

By turning the hexagonal nob 40-60 turns in a clockwise direction

Question 11

Can you manually release a spring park brake if main res air pressure is applied to the spring park brake?

Answer 11

No because it can cause serious damage to the mechanism

Question 12

How long does it take for the spring park brake train lines buttons to become energised after the MA has been turned on?

Answer 12

60 seconds

Question 13

What is the optimum main res pressure?

Answer 13

585-725kpa

Question 14

What should the pressure be in the brake pipe/auto air regulating valve after application?

Answer 14

380-410kpa

Question 15

What pressure should be in the brake pipe/auto air regulating valve before application?

Answer 15

550kpa

Question 16

What should the pressure be in the brake pipe after a full service application?

Answer 16

380-410

Question 17

What should the pressure be in the brake cylinder after full service application on the auto air?

Answer 17

275kpa

Question 18

What should the pressure be in the control reservoir, the trip and line breaker case?

Answer 18

490-510kpa

Question 19

What should the pressure be for a VICERS reset or trip reset?

Answer 19

Under 25kpa

Question 20

At what pressure is needed for the control governor to close?

Answer 20

400-430

Question 21

When doing a trip test, what should the brake pipe pressure drop below?

Answer 21

150KPA

Question 22

When doing a continuity test, what should the brake pipe pressure fall below?

Answer 22

300KPA

Question 23

What is the control res minimum pressure?

Answer 23

490-510kpa

Question 24

What pressure does the control governor open?

Answer 24

310-340kpa

Question 25

What pressure should the control governor close?

Answer 25

400-430kpa

Question 26

What should the bp fall for a safety apparatus test? (Hand and foot pilot valve)

Answer 26

290kpa

Question 27

What is the brake cylinder pressure in step 7 on the EP brake?

Answer 27

250kpa

Question 28

What is absolute minimum brake pipe pressure?

Answer 28

425KPA

Question 29

What runs off main res pressure?

Answer 29

Brake controller 
Doors
Airbags
Whistle
Spring park brakes