I recently replaced a set of hammer return springs in a 1979 Kimball Spinet. Other than the return springs having needed replacement the piano is in very good condition (I didn't say the tone is very good, but the piano is fine - for whatever that is worth). Anyways, the job went smooth, except that the action is now very heavy/stiff (dah, new springs will do that). My client's little 6 year old girl, who also happens to be legally blind, is very petite and not real strong. She will be taking lessons on this piano, and I'm a bit concerned. I'm asking whether or not it is necessary to "pre-tension" the springs (weaken or strengthen them a bit) before or after reinstalling the spring rail. The new springs (they are the short spinet type and are naturally stiffer than the longer console and upright springs) were about perpendicular to the shanks before they were set onto the hammer butts. Obviously, over time (how much time, though?) the springs will weaken to a point where the action is not so stiff and heavy. What can or should be done to the new springs before or after installation into the spring rail to end up at the correct spring tension against the hammer butts? I haven't read or heard to much on this subject regarding hammer return spring replacement. Any suggestions would be appreciated. Regards, John Piesik San Diego Chapter PTG JPIESIK@ARINC.COM
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