<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html xmlns:o="urn:schemas-microsoft-com:office:office" = xmlns:w="urn:schemas-microsoft-com:office:word" = xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; = charset=us-ascii"> <meta name=ProgId content=Word.Document> <meta name=Generator content="Microsoft Word 9"> <meta name=Originator content="Microsoft Word 9"> <link rel=File-List href="cid:filelist.xml@01C4DF64.650A6440"> <title>Message</title>  <style>  </style> </head> <body lang=EN-US link=blue vlink=blue style='tab-interval:.5in'> <div class=Section1> Ta= ke about a number 20 center pin and lock it in needle nose vice grips (everyone = has a pair of these- right?). Insert the pin between the = “buckskin” and the felt and pull the buckskin away from the felt all around the knuckle. You are looking = to separate the buckskin from the felt and also stretch the buckskin. The = pin will bend before you pull too hard. You’ll probably bend up a couple = before you get all the way through the set. <o:p></o:p> <!= [if = !supportEmptyParas]> <![endif]><o:p></o:p> Th= is is a temporary, quick and dirty way to quiet hard noisy knuckles. Works well = on Young Changs.<o:p></o:p> <!= [if = !supportEmptyParas]> <![endif]><o:p></o:p> Dean<o:p></o:p><= /font> Dean May             cell = 812.239.3359<o:p></o:p></= p> PianoRebuilders.com   = 812.235.5272<o:p></o:p></= p> Terre Haute IN  47802<o:p></o:p> <= span class=EmailStyle17><![if = !supportEmptyParas]> <![endif]><o:p></o:p> -----Original Message----- From: = pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]On = Behalf Of Brad Smith, RPT Sent: Saturday, December = 11, 2004 7:16 AM To: 'Pianotech' Subject: RE: Noisy Action troubleshooting <![if = !supportEmptyParas]> <![endif]><o:p></o:p> Thanks everyone for replies.  <o:p></o:p><= /p> I checked this action briefly; didn't have time to take = everything apart...<o:p></o:p>  <o:p></o:p><= /p> There are a couple of different schools of thought amongst = the techs at this dealer. <o:p></o:p> One believes that the wippen flanges are pinned too loosely = or are too loose. <o:p></o:p> I had originally believed it was key bushings being = excessively loose. <o:p></o:p> The key bushings are loose, but the noises are still there = when you hold the key still and 'bob' the wippen up from below. = <o:p></o:p><= /p>  <o:p></o:p><= /p> The knuckles feel like rocks!  I tried to stick a = voicing needle from the side, into the felt under the buckskin...could barely = get it in there.<o:p></o:p> Any remedy other than replacing all the knuckles?  = <o:p></o:p><= /p> I lightly roughened a few with sand paper, and it did have = some effect.  Although I don't really want to tear up buckskin on the = whole action do I? <o:p></o:p>  <o:p></o:p><= /p> Also tried some fabric softener on one, no immediate = change, but maybe when I see it again Monday.<o:p></o:p><= /p>  <o:p></o:p> It seems as if every surface that makes contact with a = moving part is too hard. <o:p></o:p> -Knuckles contacting tops of jacks on = rebound<o:p></o:p><= /p> -Rep lever regulating screw contacting its (hard) rest = felt<o:p></o:p><= /p> -Jack contacting its return cushion<o:p></o:p><= /p> -Hammer contacting hammer rest rail felt (this one actually = uses keyframe felt, woven/dense)<o:p></o:p><= /p> -Maybe even wippen cushion contacting capstan = <o:p></o:p><= /p>     (on a hard blow, wouldn't the wippen = actually separate from capstan, although very briefly?  I suppose it depends = on key weighting)<o:p></o:p>  <o:p></o:p><= /p> Anyway...what else can I do to these rock hard knuckles? = <o:p></o:p><= /p>  <o:p></o:p><= /p> Thanks!<o:p></o:p>  <o:p></o:p><= /p> Brad Smith, RPT<o:p></o:p><= /p>  <o:p></o:p><= /p> -----Original Message----- From: Avery Todd [mailto:avery@ev1.net] Sent: Sunday, December = 05, 2004 5:14 PM To: Pianotech Subject: Re: Noisy Action troubleshooting<o:p></o:p> Brad, Another possibility is very hard buckskin on the knuckles. I just finished replacing a set on a brand new grand in the store I do some work for. It really helped! Avery At 11:45 AM 12/5/04, you wrote: <![if !supportLineBreakNewLine]> <![endif]><o:p></o:p> <![if = !supportEmptyParas]> <![endif]><o:p></o:p><= /p> ----- Original Message ----- <o:p></o:p> From: <a href="mailto:staff@smithpiano.com">staff</a> <o:p></o:p><= /p> To: <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a> = <o:p></o:p><= /p> Sent: Sunday, December 05, 2004 3:29 AM<o:p></o:p><= /p> Subject: Noisy Action = troubleshooting<o:p></o:p><= /p> Hi All, <o:p></o:p> This week I will be diagnosing a new, very noisy, Nordiska = grand action for a concerned dealer. <o:p></o:p><= /p> Nordiska is Chinese manufactured as you probably know. = <o:p></o:p><= /p> Excessive action noise, present thru whole action, but = worse on some keys/sections <SNIP><o:p></o:p><= /p> . = <o:p></o:p><= /p> Brad = Smith, RPT<o:p></o:p><= /p>   &nbs= p; Brad,<o:p></o:p><= /p>   &nbs= p; Another source of noise is very hard jack regulating punchings (makes = noise when all comes to rest.)<o:p></o:p>   &nbs= p; I've replaced under warranty on some Y.C. and Samicks in the = past.<o:p></o:p><= /p>   &nbs= p; Just one thought.<o:p></o:p>   &nbs= p; Tom Driscoll RPT<o:p></o:p>   &nbs= p; <o:p></o:p><= /p> </div> </body> </html>