[modeleng] Re: Valve Problem

Bede,

It's the valve not seating properly, maybe because it doesn't have enough 
vertical movement to seat it or not bedded in well.

Peter
----- Original Message ----- 
From: <bede@xxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: 26 May 2009 03:27
Subject: [modeleng] Valve Problem


> Hi All,
>
> Looking for help troubleshooting my Martin Evans' "Conway", 3.5"
> gauge narrow gauge 0-4-0.
>
> Tried to steam the loco over the weekend and it raised steam ok to
> working pressure (80psi), but when I opened the regulator/throttle, the
> steam just whooshed directly up the blast pipe, no power to the
> cylinders at all in either direction, tried pushing the loco back and
> forth, but no luck.
>
> I have to admit that I did an idiot thing- the smokebox was full of
> cinders and ash and my steaming buddy and I took the lazy way out and
> tipped the whole engine upright to dump the debris out.  I'm thinking
> now that this somehow caused one or both valves to become unseated which
> resulted in the steam just going straight out the exhaust port.  This
> loco has outside cylinders with the steam chests inside the frames,
> Stephenson gear with the slide/D valves vertical against the port faces.
> But I can't imagine the valves coming away that easily, esp. as
> they're vertical...
>
> Any suggestions on what steps to take to remedy this, I really hope I
> don't have to strip the loco down...
>
> Thanks,
> Bede in breezy Brooklyn
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