<html> <head> <style> .hmmessage P { margin:0px; padding:0px } body.hmmessage { FONT-SIZE: 10pt; FONT-FAMILY:Tahoma } </style> </head> <body class='hmmessage'> Yes I checked everything else regulation wise, but didn't look closely enough at LM. I will do the hammer rail "pull test" tomorrow. thanks!<br><br>Terry Peterson<br><br><blockquote><hr>To: pianotech@ptg.org<br>Subject: Re: Yamaha jack question (I figured...)<br>Date: Tue, 18 Mar 2008 22:11:54 -0400<br>From: pnotnr@aol.com<br><br> <div> <font face="Arial, Helvetica, sans-serif">Too little lost motion is what I thought when I read the post, buy since you say the regulation is correct, I didn't reply before.  I see a lot of Yamaha's in the local schools here in Maine, and I'm always cranking up capstans, then six months later cranking them back down.  So I'd give a little tug back on the hammer rail just to see if the butts are being held (ever so slightly) off the rail.<br> <br> Gordon Large, RPT<br> Hallowell, ME<br> </font></div> <div> <br> </div> <div> <br> </div> -----Original Message-----<br> From: William R. Monroe <pianotech@a440piano.net><br> To: Pianotech List <pianotech@ptg.org><br> Sent: Tue, 18 Mar 2008 9:56 pm<br> Subject: Re: Yamaha jack question (I figured...)<br> <br> <div id="EC_AOLMsgPart_2_e9c75b4f-8def-4336-ada0-ee0041176898"> <style> .ExternalClass #EC_AOLMsgPart_2_e9c75b4f-8def-4336-ada0-ee0041176898 .EC_hmmessage P {padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;} .ExternalClass #EC_AOLMsgPart_2_e9c75b4f-8def-4336-ada0-ee0041176898 EC_BODY.hmmessage {font-size:10pt;font-family:Tahoma;} </style> <div><font face="Bookman Old Style"> <div><font face="Bookman Old Style">So, if you file it under unexplained mysteries, what does that do for your client?</font></div> </font></div> <div><font face="Bookman Old Style"></font> </div> <div><font face="Bookman Old Style">Sheesh, Terry, give us a minute.  Probably not too tough to figure out if the action is in front of you, but in cyberspace a bit more challenging.</font></div> <div><font face="Bookman Old Style"></font> </div> <div><font face="Bookman Old Style">You said it was in proper regulation.  How much lost motion was there?  On a slow release of the key, does the jack reset properly?  Without more diagnostics, my first instinct is that the jacks are hanging on the butts because there is not "enough" lost motion - e.g. clearance for the jack to return.  </font></div> <div> </div> <div><font face="Bookman Old Style"></font> </div> <div><font face="Bookman Old Style">William R. Monroe</font></div> <div> </div> <blockquote style="padding-right: 0px; padding-left: 5px; margin-left: 5px; margin-right: 0px;"><br> <br> <blockquote> <hr> From: <a href="mailto:pianolover88@hotmail.com">pianolover88@hotmail.com</a><br> To: <a href="mailto:pianotech@ptg.org">pianotech@ptg.org</a><br> Subject: Yamaha jack question<br> Date: Tue, 18 Mar 2008 15:42:42 -0700<br> <br> <style> .ExternalClass #EC_AOLMsgPart_2_e9c75b4f-8def-4336-ada0-ee0041176898 .EC_ExternalClass .EC_EC_hmmessage P {padding:0px;} .ExternalClass #EC_AOLMsgPart_2_e9c75b4f-8def-4336-ada0-ee0041176898 .EC_ExternalClass EC_EC_body.hmmessage {font-size:10pt;font-family:Tahoma;} </style> Customer owns a yamaha console, only about 11 years old with minimal use. Got a call that some keys were sticking. Upon inspection I confirmed quickly that the problem was *not* in the keys, but the jacks. Turns out that many of the jacks (plastic) are having trouble resetting back under the hammer butts for some reason. This happens whether the damper is depressed or not, when repeating the same notes at a reasonable speed, but less than trill.  <br> <br> A check of the action determined that the regulation is correct, the centers are not tight, the hammer butt buckskin is not worn at all, and the jack springs are not the problem. I also noted that the top of the jacks have sufficient slickness/graphite. So what could be the source of this problem? The backchecks are also properly regulated. Should I try spraying McLube on the tops of the jack, then brushing on some powdered teflon? Could it be that the jacks being plastic could be part of the problem? <br> <br> Terry Peterson<br> <hr> Connect and share in new ways with Windows Live. <a href="http://www.windowslive.com/share.html?ocid=TXT_TAGHM_Wave2_sharelife_012008" target="_blank">Get it now!</a> </blockquote><br> <hr> Shed those extra pounds with MSN and The Biggest Loser! <a href="http://biggestloser.msn.com/" target="_blank">Learn more.</a> </blockquote></div> <div id="EC_u8CA577DBC691177-1098-2A16" class="EC_aol_ad_footer"><font style="color: black; font-family: ARIAL,SAN-SERIF; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><hr style="">Supercharge your AIM. 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