I've got a Yamaha console (about 13 yrs. old) that has suddenly developed a problem with the loops, which hold the hammer return springs, starting to break. (Schwander style, you know). Why would these be breaking? I'm wondering if the material of the loops is not treated with moth repellant, and if so may have been weakened by little critters? Would some type of corrosion on the springs have begun to act as an abrasive? By the way, what material should I replace these with? I've used dental floss for repairs, but I'm sure that's not the appropriate material (actually I'm not sure, but I'm guessing). But first I want to have at least a theory of what has caused the problem so it doesn't come back as soon as I'm done. Bob Simmons, RPT CSU San Bernardino
This PTG archive page provided courtesy of Moy Piano Service, LLC