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Immobilise v Dispose of train
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SpacePhoenix
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I'm not a rail industry employee but am guessing that disposal is when a unit is parked up at the end of its diagram and immobilizing is making it safe to be approached in an emergency or if it's broken down
Generally speaking immobilise is just when the loco/unit is not going to be working for a little while but the engine is still left running...or in the case of AC traction, still connected to the OLE.
Disposal is usually when loco/unit is finished with, completely shutdown, pan down, parking brake on and all doors locked etc.
If a loco or unit has been disposed, it will require a full prep before it re enters service.
Of course different rules may apply to different companies.
Disposal is usually when loco/unit is finished with, completely shutdown, pan down, parking brake on and all doors locked etc.
If a loco or unit has been disposed, it will require a full prep before it re enters service.
Of course different rules may apply to different companies.
Agreed, many variables. I'm a trainee now but no electricity near me so can't comment about the pans. It really depends how long the train is being stabled. If it's 10 minutes then the engine doesn't even have time to shut down. If it's 3 hours then it's a bit more of a job. It's also depends where it's stabled too. 3 hours at a station or 3 hours in the yard???
I used to know the answer to this 
Pretty sure, as suggested by others, that it's something like :
Immobilise - make the unit safe and secure to be left until its next working.
Dispose - put it "to bed for the night" as it were
Similarly, mobilise and prepare for the opposite.
My recollection was that for DMUs it may have been:
Prepare 20"
Mobilise 10"
Disposal 10"
Immobilise 5" (but that was 20+ years ago!)
Pretty sure, as suggested by others, that it's something like :
Immobilise - make the unit safe and secure to be left until its next working.
Dispose - put it "to bed for the night" as it were
Similarly, mobilise and prepare for the opposite.
My recollection was that for DMUs it may have been:
Prepare 20"
Mobilise 10"
Disposal 10"
Immobilise 5" (but that was 20+ years ago!)
Johncleesefan
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I used to know the answer to this
Pretty sure, as suggested by others, that it's something like :
Immobilise - make the unit safe and secure to be left until its next working.
Dispose - put it "to bed for the night" as it were
Similarly, mobilise and prepare for the opposite.
My recollection was that for DMUs it may have been:
Prepare 20"
Mobilise 10"
Disposal 10"
Immobilise 5" (but that was 20+ years ago!)
They are very similar tasks and as stated imm is generally shutting down and locking unit whereas dispose is same plus checking all window closed, all lights extinguished and repair books checked/defects entered and reported
iphone76
Member
An important thing to remember (certainly on the cl 315s) when disposing is once you've lowered the pan you must trip the auxiliaries or everything will be dead after a while.
We had to stop doing a 'proper' disposal on 319s as the batteries couldn't seem to hold the charge even after having auxiliaries tripped (they even tried turning off the LED tail light to saver the batteries but ti didn't help!). So now a disposal is pretty similar to an immobilise.
As others have alluded to:
Immobilise - This is used in between workings when the driver is not remaining with the set. Basically involves leaving the unit in a state where it is safe and secure but also in a state where it can be mobilised and driven at short notice. It's obviously not necessary to immobilise a set if the driver is simply being relieved by another driver.
Dispose - More akin to shutting the unit down for the night. In my TOC we don't use it all that much, mainly when we out-berth at a Station or a siding. Units are generally shown to be immobilised on depots so that they can be shunted as needed.
If during the middle of a day a unit is shown to be disposed, then it will require a prep before coming back into service.
Allowances can vary between TOC, as well as varying depending on the unit and formation. In our DMU fleet, we give two minutes allowance to Immobilise for the entire formation, or five minutes per set to dispose.
Immobilise - This is used in between workings when the driver is not remaining with the set. Basically involves leaving the unit in a state where it is safe and secure but also in a state where it can be mobilised and driven at short notice. It's obviously not necessary to immobilise a set if the driver is simply being relieved by another driver.
Dispose - More akin to shutting the unit down for the night. In my TOC we don't use it all that much, mainly when we out-berth at a Station or a siding. Units are generally shown to be immobilised on depots so that they can be shunted as needed.
If during the middle of a day a unit is shown to be disposed, then it will require a prep before coming back into service.
Allowances can vary between TOC, as well as varying depending on the unit and formation. In our DMU fleet, we give two minutes allowance to Immobilise for the entire formation, or five minutes per set to dispose.
Thanks very much for the responses, very detailed as ever on here.
The trains are stabled overnight at the terminating station, and in service next day approximately 5-7 hours later. We sometimes close the doors (normally if there are no cleaners around) and sometimes put the pans down if requested to do so by the station charge man. Regardless of the task at the end of our shift, we are given 2 minutes to do so. It can show on the diagram as dispose or immobilise but both are timed at 2 minutes.
The trains are stabled overnight at the terminating station, and in service next day approximately 5-7 hours later. We sometimes close the doors (normally if there are no cleaners around) and sometimes put the pans down if requested to do so by the station charge man. Regardless of the task at the end of our shift, we are given 2 minutes to do so. It can show on the diagram as dispose or immobilise but both are timed at 2 minutes.
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