http://www.westernthunder.co.uk/ind...vacuum-brake-dual-heat.2693/page-2#post-69426
(Post #24)
At last! The elusive Mk2 vacuum cylinder!
I'm trying to work out it's location on the underframe. The various boxes help (we're looking at the side with the heater system box and electrical control boxes), as does what I assume to be the centre vestibule door. It seems to be offset to one side of the centreline, towards the viewer in this case.
Another nagging question, of course, are there two cylinders? It seems there are. You can just make out the shape of the other cylinder lurking behind the fusebox in post #22.
I'd be interested if we can find out how the vac and air brake linkages worked. They must act at some point on the main brake pull rod.
Thanks for posting these, Graham. Very interesting stuff.