Dear Nick,
The only thing I have in the Stores at the moment that looks remotely like this is a 7hp compressed air motor fixed on a bed to a hydraulic pump. It came off a twin boom drilling rig I bought for for very little some centuries ago(!), from the Redburn Mine only a matter of days before the pumps were switched off - I think this about 1976. With the help of the Workshop crew, and a number of ten pound notes(!), and the normal good natured swearing(!), we took the booms off, and everything else quickly salvageable, but the rest of this poor tracked machine lies 500ft under water now in the main drive. What a job to squeeze those booms into the cage! I have the p.graphs! What annoyed the Crew was that someone had not charged up the remaining 3t battery loco, so we had to push everything about a mile on six flatbeds! Wonderful days never to be repeated.
So, after this preamble, is this very nice shiny piece of eqpt. of yours connected with compressed air?
Kind Regards, Bernard