damper mechanism squeaks....argh!

[Joseph Alkana]

Try bracing under the bottom board and see if the squeak goes away
Joseph Alkana RPT
  ----- Original Message ----- 
  From: Gene Nelson 
  To: Pianotech List 
  Sent: Thursday, December 21, 2006 9:17 AM
  Subject: Re: damper mechanism squeaks....argh!


  Did you put the buckskin in areas around the bottom board?
  Any flex in the bottom board?
  Gene
  ----- Original Message ----- 
    From: piannaman at aol.com 
    To: pianotech at ptg.org 
    Sent: Thursday, December 21, 2006 7:16 AM
    Subject: damper mechanism squeaks....argh!


     Hi All,

    I thought I could solve any damper pedal mechanism squeak, and up until recently, I've had pretty good luck.  Then I met a recent model Hallet-Davis (Dongbei built, I believe) upright.  

    I lubricated and tightened everything I could think of.  Here's the list of things I tightened and lubed:

    Lubed
    damper flange centers (protek CLP)
    damper springs (teflon powder)
    damper lever felt with teflon(two weeks prior) and protek last night
    lift rod with protek
    all rod tips and linkage w/ special blend

    tightened 
    all screws on the various rails
    pedal rod hinge screws
    all pedal brackets and fixture screws
    all damper flange screws
    all available case screws
    In addition, I inserted buckskin pieces in places where case parts were rubbing and replaced the rubber pieces where the pedal rod inserts into the lift rod with buckskin pieces

    Noise still there…..argh! It sounds to me like it's the damper lever felt/lift rod interface. It doesn't happen when the pedal is first being used, say for 20-30 presses of the pedal. Then gradually, the creak comes back.

    I don't know what else to do. Did I miss anything?  Any ideas?

    Dave Stahl

    Dave Stahl Piano Service
    650-224-3560
    dstahlpiano at sbcglobal.net
    http://dstahlpiano.net/





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