Memphis32 Posted July 22, 2016 Share Posted July 22, 2016 Hi there, I have a Bachmann/Liliput 18.3 with poorly valve gear. I tried getting the complete assembly through Bachmann UK, but Liliput have sold on all their parts for these to a german shop, which charges a fortune for postage. Since I'm supposed to be a modeller, I figured I'd have a go at fixing it myself, except the motion appears very different from standard Walshaerts. Wikipedia tells me they called it a Heusinger motion, except wiki also tells me it's the same as Walshaerts, which it clearly isn't. Could someone who has one please do a short bit of video of the valve gear working, and upload it/send it to me? Or even better, if they're in the vicinity of Cambridge/Newmarket, let me have a look myself? Link to post Share on other sites More sharing options...
Horsetan Posted July 23, 2016 Share Posted July 23, 2016 (edited) Which German shop has taken over the Liliput spares? Click this link: is this the part you need? Edited July 23, 2016 by Horsetan Link to post Share on other sites More sharing options...
Memphis32 Posted July 23, 2016 Author Share Posted July 23, 2016 Same shop, though it's €15 on their own site. €17.50 postage though. Link to post Share on other sites More sharing options...
Horsetan Posted July 23, 2016 Share Posted July 23, 2016 Same shop, though it's €15 on their own site. €17.50 postage though. 15 Euro is cheap compared to what Roco and Gutzold charge for their equivalent spares! Link to post Share on other sites More sharing options...
Memphis32 Posted July 23, 2016 Author Share Posted July 23, 2016 15 I'm happy with - 32.50 is worth me trying to fix it myself first!! Link to post Share on other sites More sharing options...
Horsetan Posted July 23, 2016 Share Posted July 23, 2016 (edited) I have a Bachmann/Liliput 18.3 with poorly valve gear. ....Could someone who has one please do a short bit of video of the valve gear working.... Look no further: ....plus some shots of the real thing included in this video here: Edited July 23, 2016 by Horsetan 1 Link to post Share on other sites More sharing options...
Memphis32 Posted July 23, 2016 Author Share Posted July 23, 2016 Brilliant. I did what I thought was an extensive search on YouTube before I posted here, but didn't see that second one - that should be all I need! Link to post Share on other sites More sharing options...
Horsetan Posted July 23, 2016 Share Posted July 23, 2016 18.316 is the only one of the three DB survivors to have worked in preservation. By all accounts, the cost of another overhaul was too much, so it's been static since 2002.... Link to post Share on other sites More sharing options...
Memphis32 Posted August 16, 2018 Author Share Posted August 16, 2018 (edited) 2 years on, and I've finally had a look at this issue!! I also have looked up some more terminology so I can describe what is wrong a bit better! The issue lies with the valve stem on one side behaving differently from the other. Unfortunately it's in this area the Heusinger motion seems to differ from Walschaerts - there is an extra link in the combination lever. On one side this link moves with the combination lever, and the valve stem moves in and out, on the other side the combination lever pivots on this link and the valve stem is stationary. Looking at the youtube videos posted earlier, the second of these seems more common on the model, but I've seen hints of the other movement also happening, and in some cases both on the same model, like mine. You can see it from 4:05 in this video - the visible side has the valve stem stationary, the shadow of the far side you can make out the valve stem sliding: Having taken the model apart, expecting to find the valve stem had just come loose on one side, it looks like they're supposed to slide, there just seems to be more friction in the linkages on one side. Until I figure out how to make it work as it should, I'll just live with it!! Edited August 16, 2018 by Memphis32 Link to post Share on other sites More sharing options...
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