[modeleng] Re: Valve Problem
- From: "Barrie Purslow" <bpduo@xxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Tue, 26 May 2009 10:23:27 +0100
Hi Bede,
Yes, I would have a few quid on you having got some debris underneath the
seating face of one or both slide valves. Regarding a possible solution to
the problem - I have never tried this myself but I think it is worth putting
an airline onto the blastpipe. This should lift the slide valves and,
hopefully, clear away the debris unless, of course, the debris has become
embedded in the seating faces.
The only other solution I can think of is the one you mentioned - a
stripdown. These sort of jobs are usually not quite as bad as the thought of
doing it and you invariably sort out a few other potenetial problems along
the way.
Good Luck!
Barrie
----- Original Message -----
From: <bede@xxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Tuesday, May 26, 2009 3:27 AM
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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