Pneumatic Faults

Question 1

What notification will you get that EP brake has failed to release on a bogie?

Answer 1

Brakes on illuminated

Local fault - brake bogie 1 or 2

Fault location - unit 1or 2

Question 2

How do you isolate a bogie when brakes won’t release?

Answer 2

TC, PA, RTA, full cab unattended

Locate faulty bogie via fault panels in each cab of affected unit

Remove cover of brake module and turn Bogie IC (lower cock)

Book TMM, cancel RTA

Operate as per isolated bogies procedure

Question 3

What indication will you get if a bogie has been isolated?

Answer 3

Brakes Cut Out Bogie 1or 2

Local fault - brake bogie 1 or 2

Fault location - unit 1 or 2

Question 4

What indication will you get if park brake has failed to release?

Answer 4

Light on rotary switch will remain illuminated regardless of position

Retardation

Smoke

Question 5

What should you do if park brake fails to release?

Answer 5

Operate rotary switch several times

Observe Cab/Train Manned CB set

Attempt to Power train against brakes. If you can Detrain pass and shunt to nearest siding

If you can’t / RTA and locate air leak. If no air leaks, TMM, rescue

Question 6

What do you do if park brakes won’t release and you have located a MR air leak?

Answer 6

Manually release park brake:

Turn bogie IC on brake module

Unlock and remove locking pin from park brake manual release device

Pull manual release device until tension releases

Replace lock

Turn bogie IC back

TMM

Question 7

Once you have manually released park brake what will happen next time park brakes are applied?

Answer 7

They will apply again

You would have to leave the bogie isolated and run as per bogies isolated to avoid them coming back on

Question 8

What is MR pressure?

Answer 8

850-1000

Question 9

What indication do you get if MR is getting low?
At what pressure do you get alerted?

Answer 9

Uncouple light will flash RED if MR drops below 750kPa

Question 10

What should you do if MR drops low but remains above 600kPa?

Answer 10

Monitor and book

Question 11

What pressure will MR cause safety loop to open

Answer 11

When it drops below 600kPa

Question 12

What do you do if you have a air suspension rupture causing MR to drop below 600 and safety loop opens?

Answer 12

Turn air suspension IC in brake module.

Then do other bogie. You have to do both so car remains level

Question 13

What is the speed restriction on Siemens with a deflated air bag?

Answer 13

80 kmh

Question 14

How would you know the secondary suspension (spring inside airbag) is defective?

Answer 14

Train on level ground

Isolate/deflate airbags

Inspect car for a lean to one side

Question 15

How do you recognise defective dampers?

Answer 15

Dripping with oil

Loose screw connections between damper and bogie or car

TMM

Question 16

If MR is running low around 700 kPa what do you do

Answer 16

Check towing cock to see if it is in rescue position

Check compressors running

Question 17

What do you do if you have MR leak in cars 1,2 or 5,6

Answer 17

Locate, attempt to blank

Isolate MR end cocks

Train disabled

Question 18

What happens to brakes when MR isolated?

Answer 18

EP brakes will not operate on those cars

Question 19

If a Siemens train is assisting a disabled train with MR isolated how would they couple?

Answer 19

Electrically

Question 20

If MR isolated in the leading cars where will rescue come from?

Answer 20

Advance

Question 21

If MR isolated in the trailing cars where will rescue come from?

Answer 21

The rear

Question 22

What do you have to do to the leading cab in a train rescue

Answer 22

Bypass safety loop

Question 23

When MR isolated what do you have to do to defective cars?

Answer 23

Isolate bogies and release spring park brakes

Question 24

If you have a MR leak on car 3 or 4 what do you do?

Answer 24

RTA, PA, TC, full cab unattended

Close MR ICs at both ends

Manually release park brakes
(Isolate bogies??)

Isolate safety loop in lead cab

Drive as per equip isolated

Detrain passengers at first station, shunt to first siding

Question 25

What indication will you get if you lose an air compressor?

Answer 25

Compressor fault.

Fault location- first or second unit

Question 26

What do you do if you lose one air compressor?

Answer 26

Monitor MR pressure to ensure remains above 600

TMM

Question 27

What do you do if MR pressure drops below 600?

Answer 27

Safety loop would open

Inform TC and request permission to perform TRAIN STABLE.

If train stable effective submit TMM

Question 28

If MR has dropped below 600 because of air compressor fault and train stable didn’t fix what do you do?

Answer 28

Turn compressor pressure switch to isolate position.

Air compressor runs continuously.

Question 29

If turning compressor pressure switch didn’t fix what happens?

Answer 29

Train disabled

Question 30

Why would you need to isolate a sander?

Answer 30

Major damage to sander unit

Air leak causing low MR affecting safe operation of train

Question 31

How does Siemens whistle work?

Answer 31

Solenoid valve requires electric signal.

Question 32

If whistle sounding continuously what do you do?

Answer 32

Operate lever several times

Trip and reset - DC-DC Inverter Front Light/Wiper CB

If this doesn’t work turn IC in panel to left of driver seat

Question 33

If whistle not sounding what do you do?

Answer 33

Operate lever several times

Ensure IC is open and retest

If still doesn’t work trip and reset :
Windscreen wiper Horn CB
DC-DC Inverter Front Light/Wiper CB

Submit TMM