I've encountered this a lot on older Samicks and Young Changs. I remember talking to Phil Glen about this when he worked for Young Chang, he claimed that the bushings were overly dense and with use they actually begin to unpack slightly causing the center to seize up. It's almost always the most used notes that have the problem. I don't think Alcohol and water will work in this type of situation. Reaming and changing pins is the way to go. More work for us! Yay! (As if there wasn't enough already!) -- Ryan Sowers, RPT Puget Sound Chapter Olympia, WA www.pianova.net On Sat, Oct 2, 2010 at 9:32 AM, Ron Nossaman <rnossaman at cox.net> wrote: > > I serviced a Nordiska grand yesterday. It wasn't that far out of tune, and > being in the beginning of seasonal transition, it was a lousy time to be > doing a church tuning. But - there was this sticking damper, you see, which > was the real reason for the tuning. > > I pulled the action, and crawled into the cavity with whatever light > sources I could point in the general direction of the problem, and started > looking. I centered the wire, eliminating side pressure on the bushing, and > that helped, but didn't do it, so I pulled the wire. Yup, the post pinning > was way tight. I dropped the sostenuto and raised the up stop rail out of > the way, and got the under lever out. Yup, the flange pinning was way tight > too. So I repinned and FINALLY managed to get the sucker back in (the screws > are flat ended, and too hard to file). When I had the lever out, I showed > the office resident what the problem was and promised him that this wasn't > the end of it. I suggested doing the one for now, and when the others start > seizing up too and force the issue, we could do the set then. > > Now, for those of you with some experience with Nordiska, besides having > the usual painfully strident, thin, and LOUD sound, and the heaviest music > desk on the planet (I like that one), is this center pinning thing typical? > Ron N > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20101002/f6636366/attachment.htm>
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