Comeng Faults - Pnuematics Flashcards
If main res pipe fails or supplementary res ruptures on a T car, what is affected?
Doors
Airbags
Brakes
How many bogies constitute above 80% braking capacity?
2
How many bogies isolated constitute 50%/80%?
Up to 6 bogies
What happens if you have a substantial leak in the control res?
You will lose main res pressure
What happens when you trip the compressor synch circuit breaker?
The local compressor runs independently off the pressure settings for that compressor
What pressure settings is read for the compressor governor to close?
The highest of the low range pressure settings
What pressure settings is read for the compressor governor to open?
The highest of the high pressure settings
What pressure setting does the main res safety valve release excess air?
775kpa
How do we isolate a local compressor governor?
Trip the compressor gov circuit breaker in that cab
How to we locate a defective compressor governor?
When compressors continue to run, go into each cab and trip the compressor gov circuit breaker until they all stop operating
What stops working if the compressor governor circuit breaker is tripped?
The train lined spring park brake buttons
With a leading motor main res pipe rupture, what do we lose?
Doors Uncouple Whistle/wiper Control res Spring park brake Air suspension Brake controller Pantograph
What can happen if the automatic drain valve is broken and not plugged?
You will lose air in the brake cylinders
What is the procedure for a ruptured main res tank?
Locate rupture Close main res Delivery cocks Turn off compressor contractor Release spring park brakes Isolate compressor gov circuit breaker
What is the speed restrictions for a defective air bag?
Half the track speed and to a maximum of 30km/h
If the speed is 50km/h with deflated air suspension, what is the new speed?
25km/h due to half the track speed but a maximum of 30km/h
What pressure is needed in the control res?
490-510kpa
What is the control res function?
Allow line breakers to close
Activate trip latching gear
What do we isolate if the pipe from the main res to the control res is broken or leaking?
Control res in isolating cock
Cut out motors
Local rheo
Submit tmm
If there is a leak between the control res and line breaker case past the control res out isolating cock, what do we isolate?
Control res out and motors cut out switch to all out
What is isolated if the trip latching lever is leaking from the control res?
The trip isolating cock in the van area
What is the procedure if brake pipe and main res pressure are depleting?
Place brake handle to emergency
Ensure train is not derailed or broken away
While handle is in emergency, observe main res needle is stabilising
If not contact train control
If it is try to recharge brake pipe
What pressure is needed in the line breaker case to close the circuit?
485kpa
What happens if a MA is inoperative?
Half saloon lights, air con and headlights
On motor numbers 301-359 headlights may fail
What is the procedure for a defective horn?
15km passing stations, yards, or track side workers and releasing the doors twice for customers who are within the yellow line
With a defective horn what is the procedure through level crossings?
Flashing high beams and hazard lights
What is the procedure for a continuously sounding horn?
Rapidly move the lever
Define a horn defect
Not sounding
Continuously sounding
Tone too low
