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A thread not too long ago here: https://railforums.co.uk/threads/bogie-chassis-connections.214776/

I once saw that Northern modified a DMU a while ago so the cooling fan could be reversed to blow out debris from the radiator, not sure how effective it was though.

To add a little extra complexity, the tracklink antenna isn't mounted centrally (under the battery box towards no.1 end) so the beacon placement has to account for the extra distance between antenna and no.2 end of the vehicle, rather than vehicle centre.

Another issue of coupler compatibility to consider... Even if every train in the country was electrically compatible, their construction may not be. Imagine if a 26 meter IET with its lengthy nose cone had a BSI coupler fitted (ignore electrical compatibility for now) and was attached to a 142...

Pendos and 334s do not share the same motors either.

Screws for the anvil support bracket too long & bottomed out? While I'm only speculating that would certainly create sustained pressure within the same piece of material and as it looks as if there are two screws on the outer end (in relation to bogie centre), that's the width of the material...

Section 10... https://www.raildeliverygroup.com/files/Publications/New-Folder/2019-01_20_Point_Plan_Issue14.pdf You would have to be deeply imbedded within a fleet's management to fully understand where a particular fleet sits!

Some bogie drops are actually ideal for that type of work.

A HVAC shouldn't be turned off by the MCB... It can damage it!

Unless they're set up accordingly after tyre turning / new wheelsets.

Quite possibly. I've seen a few of these corner sections arrive on pallets when front end repairs are carried out (one as recent as a few weeks ago for a 185!) and they're consistent with the drawings that I've studied. I could even debunk it a little further and say that the windscreen portal...

The front end of the bodyshell is constructed using the two cornered panels that meet a centre section, so those weld lines are there regardless (even on units that were never destined to have gangways). I don't know the history of these units so can't confirm or deny - but that photo doesn't...

ZFs as fitted to buses (for years now) have a lock up clutch which by-passes the fluid coupling function. I think this transmission is essentially what's in (or similar) 172s etc > ZF in a bus Fluid couplings transmit power from engine to transmission (obviously) but also allows it the other...

Some types of unit have the benefit of the cab backwall doors opening automatically when the emergency brake 'plunger' is pressed for an imminent escape!

I can give an example of a Desiro and I expect other trains share a similar design. The bolster is bolted directly to the bodyshell. The bolster also has a 'tunnel' to accommodate a cardan shaft (if DMU). At the lower end of the bolsters tunnel there is a tapered pin which the centre pivot...

These loco / unit reliability threads are interesting. If you take any one class of train from 50s (for example), I guarantee you will find at least one aspect of it's construction / design that has had it's shortfall, at some point in its life (whether it be known broadly or not). The thing to...

Desiro (classic) doors - Bode.

Note that when I say "all parties", I didn't mean traincrew... The point being that the unit design had been accepted, therefore, how can the manufacturer be solely blamed for a train failing due to the desk not being totally driver/coffee proof?!

From what I can tell, there is no incentive for the maintainer to physically ride out and ask traincrew on their opinion, that would be up to the TOC internally. Typically TOCs fleet/technical department raises issues with maintainer. I specifically say maintainer as the designers will be long...

I'm not familiar with these units but my point about scrutiny would involve those between owner / operator/ manufacturer / maintainer. If those who work them day in-day out had no input at that stage then I agree that would have been silly. If I was working a fault that had amassed a...