<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="State"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/>  <style>  </style>  </head> <body bgcolor=white lang=EN-US link=blue vlink=purple> <div class=Section1> Julia wrote:          >> The first thing I do when a key sticks is to place my finger under the wippen. If the wippen moves freely and kicks the jack up to hit the but, and the hammer plays, then I know it is the key that is sticking. Then I test the key, usually thats where it is sticking<<<o:p></o:p> <o:p> </o:p> I don’t think that is a very good test. I’ve seen several sluggish keys caused by whippen centers too tight that would pass Julia’s test. <o:p></o:p> <o:p> </o:p> Hold the whippen up with a finger is a good way to test the key. With the weight of the whippen off the key you can raise and lower the key to get a feel for excess friction. <o:p></o:p> <o:p> </o:p> Dean<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of KeyKat88@aol.com Sent: Thursday, October 19, 2006 2:14 PM To: pianotech@ptg.org Subject: Re: Young Chang Sticking Keys<o:p></o:p> </div> <o:p> </o:p> <div> Greetings Joe,<o:p></o:p> </div> <div>  <o:p></o:p> </div> <div>           The first thing I do when a key sticks is to place my finger under the wippen. If the wippen moves freely and kicks the jack up to hit the but, and the hammer plays, then I know it is the key that is sticking. Then I test the key, usually thats where it is sticking. If the key doesnt move up and down bu the wippen and all that comes after it in the power chain, then It could be the key bushing, either at the balance rail or the front rail. In that case ease the bushing. <o:p></o:p> </div> <div>  <o:p></o:p> </div> <div>          If the wippen is the difficult one to move with my finger then, I examine the jack to see if that bushing isnt swelled, or if the jack flange hasnt come unglued. You can also try to just move the hammer, gently with your finger, by giving it a little push. If the hammer is stuck, then it could be the hammer bushing (center pin bushing in butt) that is swelled. On Chickering and some Kimball consoles these hammer butt bushings have a tendency to absorb the atmostpheric moisture and swell. In that case they should be treated with a few drops of alcohol to water mixture. (about 1 to 5 ratio respectively) (some use 1 to 10 or less) <o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> Sometimes I have found the keysticks warped/twisted so badly and out of shape that their backs were rubbing one another on the sides. And once I found the very top key (c) was rubbing on a small block of wood which was attatched to the cheek block!! I simply sanded it down.  <o:p></o:p> <div>  <o:p></o:p> </div> </div> <div>      The key is to isolate the sticking part in the power chain. key, wippen, jack, hammer butt. Not necissarily in that order.  (I usuallly start with the wippen, as described above)  Also, sometimes pencils, small toys or other things that drop inside the piano could be the culprit. Once there was a quarter stuck between two keys in a grand piano so far down that the keyboard looked normal, I didnt see it untill I had the whole action drawer slid out! <o:p></o:p> </div> <div>  <o:p></o:p> </div> <div> Julia Gottshall<o:p></o:p> </div> <div> <st1:place w:st="on"><st1:City w:st="on">Reading</st1:City>, <st1:State w:st="on">PA</st1:State></st1:place>      <o:p></o:p> </div> </div> </body> </html>