Pneumatic And Brake Equipment Faults

Question 1

What MR pressure does the safety loop open?

Answer 1

Below 580

Question 2

What MR pressure does the safety loop close?

Answer 2

650

Question 3

What BP pressure does the safety loop open?

Answer 3

300

Question 4

What BP pressure does the safety loop closes?

Answer 4

430

Question 5

What BP pressure is traction power available at?

Answer 5

480

Question 6

MR operating pressure?

Answer 6

750 - 900

Question 7

What do you do if MR is below 580?

Answer 7

Make sure you have high voltage presence
TEC
PA
RTA
Full cab
Listen for air leaks and air comp

Question 8

What do you do if your air comp are not running?

Answer 8

Train stable
If it doesn’t fix it then disabled

Question 9

What do you do if you have aMR air leak under centre motors?

Answer 9

Attempt to plug
MR end cocks
Drain Aux res
Manually release SPB on affected car
Book
Operate as bogies isolated

Question 10

What do you do if you have aMR air leak under any other car?

Answer 10

Attempt to plug
Otherwise Disabled
Rescue from advance of fault on leading
Rescue from rear of fault on trailing

Question 11

What do you do if the trip fails to lower?

Answer 11

Raise and lower again
TEC
RTA
Modified cab unattended
Check trip cock active iso cock in aux pneumatic panel

Question 12

What do you do if the whistle isn’t sounding?

Answer 12

Operate Lever rapidly
Check low and high tone VICERS whistle iso cock in A side cabinet
If normal, check whistle in Aux panel

Question 13

How can you identify which bogie has been isolated or which sensor is defective?

Answer 13

Check the LED lights at the end of each car. Green means no brake applied

Question 14

What do you do if MR pressure is between 580 and 750

Answer 14

Book and monitor

Question 15

If you isolate a car pneumatically what else do you have to do?

Answer 15

Drain the aux res before manually realeasing SPB