If you get a brake release this tells you a lot more than you think, for instance the pass-comms are good, egress, most of the important MCB's, air, door interlock, MRG etc. On the units I prep you have what is called compressor speed up that in facts revs the engines to 2100rpm that speeds up the air charging. You need about 5.5bar or above in the main res to do any checks on the air systems.
A full prep on paper looks like a very daunting task and long winded but when you actually do one it will only take 15 minutes or so, I keep a check list with me to tick off as I go through that helps somewhat.
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Thanks for that, TDK. What does the acronym MRG stand for by the way?
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Talking about making sure the handbrake is on. A recently retired driver was jointly responsible for causing much damage to Bognor signal box in the mid 90's when prepping a slammer.
I was actually working in Bognor Regis around that time. Knew a good watering hole just down from the station with a railway theme.