Coupling And Uncoupleing Flashcards
Where can coupling and uncoupling take place?
Coupling and uncoupling can take place all over the network and applies to both freight and passenger trains.
What are the reasons for coupling and uncoupling trains?
- In yards or sidings for berthing or maintenance.
- When freight locos deliver or collect loads in the form of rail wagons.
- In the running line for passenger trains.
What happens in yards or sidings during coupling and uncoupling?
Units are split off for maintenance and then reattached for deployment into service, usually overnight.
How has technology impacted coupling and uncoupling procedures for passenger trains?
Modern technology has enabled much easier coupling and uncoupling procedures for passenger units.
What must be checked prior to coupling?
The configuration of the static and active portions of the trains along with suitability for coupling, all doors are closed on both trains, no ‘Not to Be Moved’ boards are attached, no chocks or scotches are present, no hoses or cables are attached, units are compatible for coupling, if there is another unit coupled to the rear, that anyone in the vicinity is aware that coupling is about to take place, no non-multi boards, and the stationary portion is secure.
What is the first step when coupling in stations with permissive working?
When one train attaches to another on the running line, the train to be attached to will be protected by signal.
What happens to the main aspect signal during coupling?
The main aspect signal remains at danger, but the calling on or subsidiary signal will be cleared.
What should the driver of the attaching train do after the signal is cleared?
The driver can pass the signal at danger and proceed ready to stop short of any obstruction on the line ahead.
How far should the train stop after attaching?
The train will then stop at 6 foot.
What should be checked at 2 foot?
Exit the train and check that the coupling and alignment is okay.
What is the next step after checking the coupling and alignment?
You then couple up mechanically.
What should be done after coupling mechanically?
Place the train into reverse and carry out a tug test, this does not move the train.
What should be done after the tug test?
Place the train back into neutral.
What is the purpose of pressing the couple button?
This connects the train electronically as well as mechanically.
What should be checked after pressing the couple button?
Check brakes come off on both units (Step 3,2,1. Not off.)
What is the ideal coupling configuration?
Ideally couple the smallest unit to the stationary bigger unit.
Where should coupling ideally take place?
Coupling should take place on a straight, level track where possible.
What is the first step in uncoupling units?
Energise the cab and put the train in to neutral.
How long should you press the uncouple button?
Press the uncouple button for 3-5 seconds.
What is the next step after pressing the uncouple button?
Set back 2 foot.
What must the shunter confirm before uncoupling a train?
The shunter must confirm that the movement is complete, and the train is ok to be left where it is, and it is not foul.
How must the remaining portion of the train be secured?
The remaining portion must be secured according to instructions applicable to the traction type.
What must be correctly lit as per local instructions?
Frontal and rear lighting must be correctly lit as per local instructions for that location.
Where can you uncouple a unit from another on a running line?
You must not uncouple a unit from another on a running line except at a signal box, at a signal, or on a platform.
What does a Non Multi Sticker indicate?
If one is present, it indicates a fault with the train or the coupling that will prevent successful coupling or operation.
What should you do if a Non Multi Sticker is present?
Contact the person in charge of the movement and/or maintenance control.
What should you determine if couplings are not correctly aligned?
You will have to determine the cause of the misalignment.
What should you do if the misalignment is due to track curvature or a dip?
Contact the person in charge of the movement for that location and get authority to reposition the units.
What must be carried out if a brake continuity is required?
A brake continuity test must be carried out before proceeding.
What is a risk during coupling movements related to approach speed?
Risk of collision if approach speed is too high
What is a risk associated with the security of the portion being attached?
Risk of roll away if the portion being attached to is not secure
What risk do passengers face if doors are not secured?
Risk of injury to passengers if the doors are not closed and locked
What is the risk to individuals ‘in between’ during coupling?
Risk of death or injury to anyone ‘in between’ if the train is moved while attaching hoses etc
What is a risk of failure during coupling on certain traction?
Risk of failure to couple properly on certain traction resulting in the train becoming divided (possibly after departure)
What is the consequence of failing the pull away test during coupling?
Risk of failure to couple properly i.e. pull away test on certain traction resulting in the train becoming divided
