Need Some Input

[Tom Driscoll]

Matthew,
    Good posting.
It seems like you have already made the diagnosis
 The click is usually a missing but felt square or one with too much glue
but if If the buckskin is worn off--replace it along with the square.
 If one butt has this problem the rest may be suspect also .
The squeak from the key pin-bushing interface is common especially on some  Asian piano's and can be eliminated with lubrication or if necessary  rebushing.
Teflon powder, protek, VJ lube,TFL50  --but NO graphite ( in my opinion) all have their place in the squeak hunt.
The capstan to whippen cushion or sticker cloth  can be the cause also  so check and lube there also if necessary.

A good tip told to me a thousand years ago is this:
     
Each note is it's own little machine. If  for example C -40 has a click , look at the B39 and C#41 machine that don't click. You have two non symptomatic examples to compare the problem note with.
Observe and compare and you will have the answer.
You're on the right track because you isolated the problems .
As the late great Newton Hunt once told me     "Trust yourself and do good work"
Best wishes,    
    Tom Driscoll



  ----- Original Message ----- 
  From: Matthew Todd 
  To: pianotech at ptg.org 
  Sent: Thursday, July 24, 2008 10:19 PM
  Subject: Need Some Input


  I was working on my piano this evening, and I noticed two problems, and I wanted to get some input before I proceed.

  1.  When I play one particular note, I hear a clicking sound.  It is from the action, not the key.  I believe it is the jack rubbing against the underside of the butt, and the buckskin in worn off.  When I pull the jack back with my screwdriver and release it, it does make the same kind of sound.  And when I press down on the key, wait a few seconds, then release it, I hear it too.

  2.  On a few notes I hear what sounds like a faint squeak.  I believe it may the front rail pin rubbing on worn bushing cloth underneath.


  Matthew
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