I find that most of these creaks (If it sounds like a metallic almost click) come from the hanger flanges bushings. To test this, just try to move the whole tray from left to right and if you hear the creak, this is the problem. If you can reach far enough, you can apply protek or prolube to the offending flanges' bushings and the noise will cease. You can try this method before removing the whole tray. I've had good success with this method and the noise hasn't come back (3 years now). Marcel > To: pianotech at ptg.org > From: barbara at pitchperfectpianos.com > Date: Wed, 19 May 2010 12:41:05 +0000 > Subject: Re: [pianotech] Creaky damper lift tray > > Thanks, list for all your advice. The piano I'm working on is about a 25 year old Bergmann/Young Chang. In fact, I have 2 of them with this exact problem. > > I have narrowed the noise down to the point of contact when the tray touches the underlevers. With the pedal trapwork, pitman, etc out of the way and the underlevers suspended by the sostenuto, I raised and lowered the tray by hand, finding that it did not creak until I raised it up to just touch the bottoms of the underlevers. > > Yes, I was briefly dreading having to remove all the dampers and underlevers to get to those hidden screws that hold the tray in that you can't really reach or see. But, when I coated the damper tray felt with teflon, much of the noise was reduced, but not silent. I'm thinking I may have to replace the felt entirely, as it looks worn and fuzzy anyway. > > I'm kind of curious, or at least have my suspicions, about if that black stuff that flakes off the music desk has anything to do with this. That stuff gets everywhere and there is no good way about cleaning it up and getting rid of it as long as the piano owners don't take the initiative of replacing it. Anyway, that's just my 2 cents. :-) > > Well, it looks like another beautiful day to go and knock out a few pianos, so I'm going to go find some willing culprits and see if they'll even pay me! Hope ya'll have a good day! > > > Barbara Nobbe, RPT > Pitch Perfect > 859-489-4793 > barbara at pitchperfectpianos.com > > -----Original Message----- > From: "Gerald Groot" <tunerboy3 at comcast.net> > Date: Wed, 19 May 2010 07:56:51 > To: 'Chuck C'<chchristus at earthlink.net>; <pianotech at ptg.org> > Subject: Re: [pianotech] Creaky damper lift tray > > Many of my creaks turn out to be the little rubber gromments in the pedal dowel of the pedal springs themselves. Lifting the the dampers off from the tray and therefore, the weights of same, might just be enough to eliminate the creaking but, have you then tried pushing down on the tray again with your hand? I have. Often times, the added weight brings the creaking back again. Protek works great for that usually if that be the case. Or, putting additional cloth inside of the coiled damper spring and moving positions on it. > 10 000 $ de magasinage avec Hotmail. Inscrivez-vous! _________________________________________________________________ Gagnez 10 000 $ avec Hotmail! Participez ici. http://go.microsoft.com/?linkid=9729718 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100519/a28fbbce/attachment-0001.htm>
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