Yesterday worked on a Yamaha G2 that was needing some deep needling, PR and tune, and un muting of all aliquot scales (ha ha ha). Almost some hammers I moved in a vertical position was blocking after that. Treated with CLP and moved back & forth a few time, and it works, but I really wonder if the pinning is shot . I had the case yet where CLP did not help enough to bring things back . Touch a bit heavy of course (trucking) on this piano. # E 173363 ( 1973 ) Do some of you had tight pins problems on these years grand's ? Thanks Isaac OLEG > -----Message d'origine----- > De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part > de Roger Jolly > Envoye : jeudi 2 mai 2002 21:11 > A : pianotech@ptg.org > Objet : Re: Yamaha damper question > > > Hi Clyde, > Yep, and the right vintage. Don't beat around the bush. Prepare > the customer to pay for the underlever tray removal, and reinstallation. > Replace all centre pins. It's about 8hrs work to do, and get them > all timed. > I like to ream them all out to a #21 pin so that I remove some bushing > cloth and get the bushings clean. I've done lots of them, and > no recalls. > > Regards Roger > > > > At 07:57 AM 5/2/02 -0400, you wrote: > >Friends, > > > >Earlier this week I received a complaint that a key was sticking on a > >1976 Yamaha G2 grand piano. When I arrived I diagnosed the problem as > >the D#4 damper not returning to rest on the strings after the note was > >played. I replaced the center pin holding the damper lever to the > >damper lever wire flange and all was fine. The same thing had happened > >to the neighboring D4 damper three years ago. > > > >The removed pin looked discolored where it rotated in the felt bushing, > >so I decided to check it out under a microscope and see if I could learn > >something. Some friends have a cheap one, but it served to show me that > >the center pin appeared to be deeply scratched around the pin. > > > >Now to my questions: Is this a case of flaking plating that I heard > >about? If not, what is likely the problem? Are the center pins I buy > >from Schaff plated as well? Will this become a chronic problem for this > >particular piano? If so, is there any preventive measure I can take > >without replacing that center pin in every damper? > > > >Thanks, > >Clyde Hollinger, RPT > > > > > > > > > Roger Jolly > Balwin Yamaha Piano Centres. > Saskatoon/Regina. > Canada. >
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