[pianotech] Weber Upright Pinblock

[Farrell]

You may well have a legitimate concern there. Good point. I would think that drilling out the hole to accept the plug would remove any silicone-contaminated wood, but it would perhaps be hard to guarantee.

Maybe it would depend a lot on how much silicone got in there. I just re-read your post describing what Phil Glenn said. Seem like he said that the silicone actually seeped some inches through the block to the bottom row of tuning pins. Hard to imagine that. But if that is what actually happened, then sounds like you're right - bonding anything to silicone-contaminated wood may likely be problematic.

Heck, it might be a problem trying to glue in a new block!

Terry Farrell
  ----- Original Message ----- 
  From: paul bruesch 
  To: pianotech at ptg.org 
  Sent: Thursday, February 26, 2009 8:04 PM
  Subject: Re: [pianotech] Weber Upright Pinblock


  I'm curious what would be used to adhere the plugs in the silicone-damaged pinblock. 


  On Thu, Feb 26, 2009 at 6:59 PM, Farrell <mfarrel2 at tampabay.rr.com> wrote:

    "The only real cure is to remove the silicone, which would require removing the pinblock."

    Or, if the rest of the block seems good, maybe plugs in the affected areas.

    Terry Farrell


      ----- Original Message ----- 
      I ran across this phenomenon a few years ago. Phil Glenn, formerly with Young Chang, told me that in the late 80's the drill bits YC used to pre-drill for the pressure bar screws were changed to a slightly smaller size. They later discovered that the guy putting the screws in put silicone on the screws so he could drive them into the smaller hole. Consequently the silicone creeped up the pinblock and typically the bottom row of holes of those pianos would become loose. 

      CA probably has the best chance of extending the tuning life of the Young Chang-built Weber. Replacing the tuning pins or driving them deeper won't help. The only real cure is to remove the silicone, which would require removing the pinblock.

      Best regards,
      Dave Davis, RPT

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