damper mechanism squeaks....argh!

[Paul McCloud]

If it is the lifter rod, I like to use McLube 1725, which is a mold release.  It stays slippery, as opposed to CLP, which has a carrier that evaporates and leaves a powdery substance behind.  
Paul McCloud
San Diego
  ----- 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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