Brake Component Defects

Question 1

When is the charging valve open and closed?

Answer 1

Open all the time
Closed when in Emy

Question 2

Interruption of power to the lock out magnet valve can be caused by…?

Answer 2

EP circuit breaker being tripped
Loss of overhead

Question 3

What happens if the lock out magnet valve is defective in the closed position?

Answer 3

No air brake

Question 4

What happens if the lock out magnet valve is defective in the open position?

Answer 4

Simultaneous air, EP and Rheo

Question 5

If the lock out magnet valve is defective in the closed position, what do you do?

Answer 5

Operate on EP Rheo at max 15 to the next station detrain and shunt. It can’t remain in service

Question 6

What controls the operation of the emy application valve?

Answer 6

Hand and foot pilot valves

Question 7

What do you loose when you turn the red EC cock?

Answer 7

Trip valve
Emy application valve
CG
Hand pilot
Anti neutralisation device
VAV

Question 8

What does the release prevention valve do?

Answer 8

Prevents the air brake from realising when the brake controller is in any position other than release

Question 9

If you have a defective release prevention valve what brakes do you use instead?

Answer 9

EP Rheo

Question 10

If the brake controller handle is moving towards the release position involuntarily during EP braking what do you do?

Answer 10

Isolate EP and drive on air

Question 11

When do the trainlined SPB automatically apply?

Answer 11

Reverser to off
Under 8km for 60 sec
Reverser to N for 60 sec

Question 12

What does the charging valve do?

Answer 12

Allows MR air to charge the BP

Question 13

If the BP won’t charge what cock should you check?

Answer 13

MR to brake controller