Comeng MAIN RES RUPTURES & other Pneumatic defects

Question 1

What must the driver do if there is a MR rupture in the MR tank?

Answer 1

Just isolate it:
- Close MR delivery ICs
- turn compressor contactor switch to off
(so compressor doesn’t continue running with nowhere to deliver air)
- isolate compressor governor CB (to stop other compresses operating continuously)

All pneumatic equipment on affected motor remains operative as the MR pipe is being supplied with air from the other MR’s on other carriages

TMM
drive as normal

Question 2

What must a driver do if the automatic drain valve has broken off the main Res tank?

Answer 2

• Blank the pipe from the brake cylinders of number one bogie to the auto drain valve
• isolate MR delivery cocks as well
• TMM

Question 3

How must the driver respond to MR flexible hose bursting in between cars?

Answer 3

Close the MR end cocks on both sides of the affected hose

TMM

Question 4

What pressure is required for control res in order for line breakers to close and the trip to raise or lower?

Answer 4

490

Question 5

What must be done on a trailing motor when control Res is empty in order to avoid back tripping

Answer 5

Yellow tech AV on the trailing motor must be isolated.
Secure & raise
Otherwise the trip will not be raised and you will back trip.

Question 6

What fault light will you get when you have a control res low pressure or empty?

Answer 6

Line switch or this car

The other motors can still power, but not the one with the control pressure that is low or empty

Question 7

When you see fault, lights, line switch, and this car how can you ensure that this car light is not related to the spring park brake being applied on this car?

Answer 7

Release the local Spring Park brake (van area) and then you’ll know if the fault is in fact related to this car

Question 8

How do you rectify when pipe from MR to control Res IN has broken or is leaking?

Answer 8

-leak b/w control res tank & control res IN IC = isolate control Res IN IC

-pipe is broken on the MR side of control res IN IC
= blank the pipe or treat as a MR defect & motors to all out

-if you do not know where the pipe is ruptured isolate both IIN & OUT control res ICs and then check the MR pressure and see if it is recovering.
if it is not recovering then it’s the pipe from control res IN going to MR that is the issue

Question 9

How to rectify when control air is leaking from the trip cock lever

Answer 9

• Turn trip IC in six cocks in the box van area
• If in trailing motor turn yellow tech AV to avoid back tripping

Question 10

How to rectify pipe leak from control Res to line breaker case

Answer 10

• Close control res out IC
• Motors to all out
  -TMM

IF PIPE IS LEAKING ON THE CONTROL RES SIDE OF CONTROL RES OUT IC THEN ISO CONTROL RES IN

Question 11

Whistle leak causing loss of MR AIR
What do we isolate and how do we drive?

Answer 11

Isolate whistle cock in drivers foot well (turn to vertical pos)

Operate train as per whistle defects restrictions

Question 12

Whistle defects - WHISTLE NOT SOUNDING
OR WHISTLE SOUNDING CONTINOUSLY

How to rectify?

Answer 12

1. Slap it (up & down several times)
2. Open & close whistle cock, slap it again, check if it works
3. Not in book but hold whistle lever down. While continue to hold it down, get a c/ e iso the cock, unisolate the cock & then check if it works

If still wont work, TMM & operate as per whistle defect restrictions

Question 13

MR RUPTURES:

What applies in all cases ?
(When rupture is in any car what must always be done/isolated?

Answer 13

• VICERS must always be isolated

-DLBP must always be isolated
- passengers must always be moved out if the car with ruptured MR & into other cars or detrained (comms doors to be locked)

• Must always try to PLUG HOLE
• must always close both MR end cocks if hole can’t be plugged
• must always trip out EP & use auto air (lead will only have EMY though)
• always run at a reduced speed :-

1/2 track max of 30 due to deflated airbags (and if rupture is in lead will be max 15km)

Question 14

How do we drive when we have MR rupture in lead motor?

Answer 14

• try plug hole / iso MR end cocks
• ISO VICERS & DLBP
• lower & iso pantos
• motors - ALL OUT
• Man release SPB
• trip EP CB (EMY brake only in lead)
  (Must have c/e to recharge BP from other motor)
• doors inoperative (pax go to diff car & comms doors locked)
• trip compressor gov. - train lined SPB lost but trip CB back in to reset b/4 releasing SPB lost

IF NO C/e train is DISABLED

Speed = 15km/h (EMY brake only)

Question 15

At what speed can train be driven with MR rupture in lead car

Answer 15

Max 15km/ h

You will only have EMY BRAKE available as MR pipe is not continuous - only BP is continuous

• Can only drive if CE avail to recharge BP from a different motor each time EMY brake is used

Question 16

How can train be driven with MR leak in any motor car other than the lead?

(What needs to be isolated etc)

Answer 16

• try to plug the hole
• Close MR , END Cocks
• iso VICERS & DLBP
• Doors and airbags not available on affected car
• passengers must be moved to a different car or detrained. Comms doors locked
• lower and iso. Pantos
• Motors to all out
• Man release SPB
• trip EPCB
• Close Yellow tech AV to prevent back tripping

Question 17

What is the maximum speed that a train can be driven when there is a MR rupture in any car other than a lead?

Answer 17

1/2 track speed max of 30

No airbags

Question 18

How can a train be driven with a main res. rupture in a trailer?

Answer 18

Try plug hole
Close MR end cocks

Isolate Vicers and door loop bypass
Move passengers to other cars or detrain
Lock communication doors

Trip EP CB
(Run on auto air)

1/2 track speed max of 30

Question 19

Trip When control res rupture in lead?

Answer 19

Trip uses control res air

Isolate trip (6 cocks on box)
Secure and raise & run in 2nd circuit

Question 20

How do you deal with a control res rupture?

Answer 20

• Isolate CONTROL RES IN/ OUT
• MOTORS TO ALL OUT
• ISO RHEO
• RAISE & SECURE TRIP
• EC