A number of the mid-sized pianos I service, built during the '60s and '70s, have excess friction in the pinning of the hammer flanges. It has been suggested to me in the past that it's a good idea to treat them with a methanol/water mix and dry them over a heat source before giving attention to individual flanges. I've been using 85% methanol/15% water, and inverting the partly disassembled action over a damppchaser dehumidifier bar. I've also read that treatment the methanol/water mixture increases the capacity of the bushing cloth to respond well to mechanical sizing strategies--in my case, the Manino flange bushing broach approach. Two questions: 1. I am pleased with the result I get, but am looking for any efficiencies I can find. In your experience, does the use of the meth/water sizing solution lay a helpful foundation for a more consistent end result? 2. Tomorrow I pick up a 1965 Steinway Sheration 4510 upright with very sluggish flanges. Am I going to be dealing with anything different here? When were the "verdigris" years? Thanks for any feedback you might give! Floyd Gadd Manitoba Chapter -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100620/0cf8241b/attachment.htm>
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