Hi All, I have never trusted vertical slide valves which can fall away from the face and have always fitted S/S springs between the bridle and the valve.ie on Pansy etc. Regards Clif ----- Original Message ----- From: "Barrie Purslow" <bpduo@xxxxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Tuesday, May 26, 2009 10:23 AM Subject: [modeleng] Re: Valve Problem > 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 >> MODEL ENGINEERING DISCUSSION LIST. >> >> To UNSUBSCRIBE from this list, send a blank email to, >> modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject >> line. >> > > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email to, > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject > line. -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.339 / Virus Database: 270.12.39/2133 - Release Date: 05/25/09 08:16:00 MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.