<font color='black' size='2' face='Arial, Helvetica, sans-serif'> <div><FONT face="Arial, Helvetica, sans-serif">Sometimes when you make several different repairs/adjustments, you never know exactly which little thing you did solved the problem. In this case, it might not have been be the spring. It could have been be a combination of a slightly tight damper lever center and gunk on the spoon. </FONT></div> <div><br> Just guessing</div> <div> </div> <div>Wim<br> </div> <div style="CLEAR: both"> <div> </div> </div> <br> <br> <div style="FONT-FAMILY: arial,helvetica; COLOR: black; FONT-SIZE: 10pt">-----Original Message-----<br> From: Larry T. <ltpianoman@comcast.net><br> To: pianotech <pianotech@ptg.org><br> Sent: Sat, Jan 28, 2012 2:52 pm<br> Subject: Re: [pianotech] Kawai puzzler<br> <br> <div style="BACKGROUND-COLOR: #fff; MARGIN: 0px; FONT-FAMILY: Tahoma, Verdana, Arial, Sans-Serif; COLOR: #000; FONT-SIZE: 12px" id=AOLMsgPart_0_b8c48c9d-2071-40bd-8609-e2b44d4d6831><PRE style="FONT-SIZE: 9pt"><TT>Just a quick thought about why a constrained spring would make the damper hang up... I think the spring has to slide a little in the groove to keep the correct alignment of the damper head. A constrained spring would keep the head at a slight angle. But I could be wrong!!!!!!!!!!!! Larry Trischetta Scranton PA -----Original Message----- From: <A href="mailto:pianotech-bounces@ptg.org">pianotech-bounces@ptg.org</A> [<A href="mailto:pianotech-bounces@ptg.org?">mailto:pianotech-bounces@ptg.org</A>] On Behalf Of Ron Koval Sent: Saturday, January 28, 2012 12:16 PM To: <A href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> Subject: [pianotech] Kawai puzzler Some detective work for this Saturday morning: Piano - Kawai NS-20 - tall upright with one of those split lid fold back tops. Complaint - some damper ringing randomly....  Owner couldn't replicate the problem earlier this month during the regular tuning visit, so I asked if theycould find out what note(s), during what pieces. Went back today after I was notified only C4 happened sometimes... So - noticed an old coffee spill leaked between the split top down onto the muffler rail and then farther down... right at C4. Piano w/plenty of plastic parts. Took out the action, still couldn't make the damper hang... Reversed it, gently pressing on dampers - C4 felt "different" - harder to push. Turns out the spring was glued to the damper lever by the spill.  Along with a mess on the spoon. Cleaned, lubed - everything seems fine, but for the life of me, I can't come up with a reason why a constrained spring would make the damper hang up and ring??? Hmmm.. Ron Kovalchicagoland <A href="http://www.ronkoval.com/" target=_blank>www.ronkoval.com</A> = </TT></PRE></div> </div> </font>