Building a 31/2" Gauge Locomotive Engine

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sbwhart:
Nick thanks for posting the pics.

I've had another go at fitting the pump, your pics confirm my conclusions, the bracket fixed to the motion frame needs to be cut away to clear the bearing plate for the lifting shaft bearing (not shown on drawing), and the bracket on the cross head goes towards the cylinder to give room for the pump body to be set far enough forward to clear the throw of the crank, (I missed this on the drawing :doh:)

Its a right tight fit, with not much clear space at all.

Thanks again, those pics helped a lot.

Stew

NickG:
Stew,

Yeah it looks a tight squeeze! Bet it's pretty fiddley to assemble all that lot! will have to take a bowl of warm water to keep thawing my fingers out when I get to the reassembling stage!

Glad I could be of some use.

Nick

sbwhart:
Thanks to Nick I understand now how the water pump fits between the frames. Before I silver soldered the fabrication together I completed the two mounting bracket, so that I could try everything in place to make sure that it would fit. This is the forward bracket that I misread the drawing on.

I was going to show the set up for soldering it together but I forgot, the only pic I've got is how I fixed the the outlet coupling. there's a 1/8" hole in the body that a little stud on the coupling fits tightly into, the feed hole in the coupling only goes part way through I drill it through when its all soldered together.

This is a C-o-C of how it goes.

And this is the fabrication soldered together.

Its turned pink due to the acid being contaminated with iron from the fixing bracket.

Cheers

Stew

Divided he ad:
Fair do's Stew, you make some cracking pieces :thumbup:

I do like watching the progress of a damn fine engineer :dremel: :nrocks:

Ralph.

NickG:
Wondered what that was Stew, looks like it has been copper welded! :lol:

Good stuff. The pump is a tiny bore isn't it? You don't happen to know whether there is a by-pass valve anywhere in the system do you? I think mine is just permanently plumbed in to the boiler - which is a bit weird as you can't control it, but the pump is so small that maybe they assume you need it running all the time and just top up with hand pump or injector if need be?

Nick

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