On 3/18/2012 10:06 PM, Ron Nossaman wrote: > On 3/18/2012 8:20 PM, Duaine Hechler wrote: > >> That is the reason for my question, I have not had the experience of >> seeing a proper setup. The one I am about to service just has the >> metal on metal connection. There was no washer stack of any kind in >> the spool end. >> >> Please, explain the proper leather washer stack for the spool end. >> >> Thank you, Duaine > > > After I sent that, I realized you said Duo-Art instead of Ampico. The > Ampico has a stack of thin leather washers in the end of the spool > acting as a rotary seal. It's been a long time since I've worked on a > Duo-Art, and don't remember specifically what's there. Ok, I found a > hosing diagram, but not something showing the replay valve. The shutoff > hoses into the tracker. In the Ampico A, the opening is on the take up > spool. Isn't the Duo-Art triggered by a lever dropping into a notch in > the take up spool to open a valve? Whatever the details are, you need an > air tight seal from that valve opening to the valve, through the metal > rotation valve and another set of control valves. It's going to take > spending the time to diagnose it, track down the leak(s) and make a real > fix. There may be a magic bullet quick fix that experts use, but I'm > only a mechanic and have to do it the hard way. > > Ron N Ok, I found a photo. It's the same trigger as the Ampico A, that little leather spot on the take up spool that the roll covers that opens the re-play valve on rewind before the shutoff is opened on the tracker bar. There's a seal as I described in the bass end of the spool. You may very likely have to chase down the rest of the valve sequence as well. Ron N Ron N -------------- next part -------------- A non-text attachment was scrubbed... Name: spoolbox.jpg Type: image/jpeg Size: 49580 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20120318/d9ed470a/attachment-0001.jpg>
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