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stephensons valve gear etc.,

eccentric problem

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David Bothwell 117/01/2020 16:23:16
134 forum posts

While recently re assembling a part built chassis (Molly) I could not get the mechanism to turn over. I removed the two bottom eccentrics and the wheels turned and eccentric also worked, but connecting the other two back brings the problem back. Could this be caused by the (slightly wrong )setting of the eccentrics on the driving axle?Leads to a further question, Drawings refer to left hand side , Is the left hand side looking from the back of the loco? Many thanks to anyone offering suggestions or solutions!

Neil Wyatt17/01/2020 16:36:52
17096 forum posts
690 photos
76 articles

Is one valve too far out of adjustment and fouling inside the valve chest?


David Bothwell 117/01/2020 16:48:34
134 forum posts

Hello Neil, No the movement in the valve chest is free, but also opening too far in forward movement, but I thought I could re-adjust this when I solved the eccentric issue! Thank for the response

Baz17/01/2020 16:52:10
323 forum posts

Correct about left, drivers left standing on footplate facing forward, cannot help with valve setting, sorry.

David Bothwell 117/01/2020 17:05:39
134 forum posts

Thanks for that Baz, a big help, I,ll get to the bottom of the valve setting somehow/some way!!

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