If the strings are breaking at the pressure bar, it could be the player using too much sustain pedal along with possibly heavy handed playing. Being a school, the player will cycle through and the problem may go away on it’s own. This happened at a local college that I’ve been tuning for fer over 20 years. They have a mix of P202’s, the old P2’s and a P22 or two. Perhaps a particular player habitually uses the same piano. Some strings break just as you start to tune that note. I’d blame that on a previous pounding in this case. Check the bearing bar (upper bridge) cast in the plate for excessively small curvature. A shape edge or extremely small diameter bearing will cause the same strings to keep breaking. A full time piano teacher has a P22 as her studio piano that gets played a lot. She bought the piano new which is how I ended up being her technician. I was working for the Yamaha dealer at the time (circa 1988). 20 some odd years later and no broken strings. I had this on a new piano (not Yamaha) and along with replacing the entire set with the same scale, I adjusted the pedal for minimal lift. I watched the very talented young lady play and paid particular attention to her pedaling technique. My fix was based on how much and how often she lifted her foot. I never heard from them again ....... which could be either good or bad. I haven’t had the problem Susan’s mentioned with the P202’s. I have a number of them on my database. I’ll watch for that however. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20130218/1169cfa2/attachment.htm>
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