New Center Pin Design

[John Ross]

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This was on Yamahas that had the loosening of the plates just starting.
I was able to loosen the plate further, and just push the plate in without causing any damage. They just slipped back into position easily.
The then, Yamaha Canada service manager, then had Yamaha ship the pianos to Canada with 'normal' flanges, although he said the US still was getting the ones with plates.
This was about 15-20 years ago.
If the action had the screws tightened up, about a year after the piano was delivered, this problem did not seem to arise.

Regards,
John M. Ross
Windsor, Nova Scotia, Canada
jrpiano@win.eastlink.ca
  ----- Original Message ----- 
  From: Farrell 
  To: Pianotech 
  Sent: Saturday, September 13, 2003 2:23 PM
  Subject: Re: New Center Pin Design


  Yes indeed you are right John. It has the plates that are loose - but being that the secure the pins, does that not mean the pins are loose as well? (ha, ha) As Richard pointed out, it looks like some have migrated into the neighboring flange bushing - I've seen that before.

  Regarding pushing the pin back in - I've tried that, and I guess I have knocked enough bushings out now that I tend to just repin it and not worry about pushing the bushing out of the flange. Maybe your luck is better?

  Terry Farrell
    ----- Original Message ----- 
    From: John Ross 
    To: Pianotech 
    Sent: Saturday, September 13, 2003 11:53 AM
    Subject: Re: New Center Pin Design


    Hi Terry,
    This Yamaha, probably has the plates with a screw to hold the pin in place.
    These screws should be snugged up, to stop the pin from wandering.
    It is not so much a loose pin that is causing the problem, it is the loose plate.
    Sometimes the pins can just be pushed back in place with no damage, if you loosen the plate a bit more.
    Then just tighten the screw. Problem solved without repining.
    Regards,
    John M. Ross
    Windsor, Nova Scotia, Canada
    jrpiano@win.eastlink.ca
      ----- Original Message ----- 
      From: Farrell 
      To: Pianotech 
      Sent: Saturday, September 13, 2003 6:32 AM
      Subject: Re: New Center Pin Design


      That was actually the problem. When I first saw it I figured the guy chewed up the flange bushings with this innovation, but I repinned it with an 0.048" pin - so no enlargement there. The long unclipped end interferring with the hammer shank wanting to return to the rest postion is what caused the inoperable key. I could see that at least half of the hammer flange center pins were walking out of their proper postition on this piano - presumably I'll have a repinning and general action refurbishing job on the piano. This particular piano was the worst Yamaha I have ever tuned with respect to stray string noise (my experience is that Yamahas are usually a pleasure to tune) - more like tuning a Kimball console (false beats and unisons that would just not come clean - I hate that).

      Terry Farrell
        ----- Original Message ----- 
        From: Richard Brekne 
        To: Pianotech 
        Sent: Saturday, September 13, 2003 4:10 AM
        Subject: Re: New Center Pin Design


        Terry 
        you gotta love it... ... the fellow / gal was clever enough to screw the darned thing out and put it in again.... but not clever enough to snip off the leftover clip... wunerful...:) 

        Farrell wrote: 

          Great new center pin design. This (below) was recovered from a 35-year old Yamaha console. One key didn't seem to be working....... I'm all for improvising, but this is ridiculous! Terry Farrell
        -- 
        Richard Brekne 
        RPT, N.P.T.F. 
        UiB, Bergen, Norway 
        mailto:rbrekne@broadpark.no 
        http://home.broadpark.no/~rbrekne/ricmain.html 
        http://www.hf.uib.no/grieg/personer/cv_RB.html 
          

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