Two weeks ago I came across the following problem. On a routine tuning service call on a Weber grand, I noticed severe blocking of hammers due to inadequate let off. Looking back on my service record I had noted making let off adjustment two years previous. I contacted the Weber service represenative and he said to problem was due to "spreading action brackets". It seems as though this is a problem that has cropped up on some Weber, Young-Chang, and Chickering grands manufactured between 1989 and 1991. He explained as best he could how to replace the action brackets. I recieved yesterday the replacement brackets from the Weber company. Since I have never come across this problem before, nor seen any write up on it in the PTG journal, or have heard any mention from fellow piano technicians on this problem, I was hoping some of you who may have encountered this problem and replaced these brackets, could give me some pointers. Bill Marciano did mention to replace the end brackets first. He also mentioned "maintaining a .112mm spread." I am still a little unclear as to what exactly this term "spread" means. Any suggestions would be appreciated. Bill HendricksonRPT
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