Expanding Action Bracket Symptoms?

[John Ross]

Young Chang action spread, pre 91 112.5mm, after 113.5mm for G150 - G208.
John M. Ross
Windsor, Nova Scotia, Canada
jrpiano at win.eastlink.ca
  ----- Original Message ----- 
  From: David Nereson 
  To: Pianotech List 
  Sent: Wednesday, March 29, 2006 6:00 AM
  Subject: RE: Expanding Action Bracket Symptoms?


   

   

  -----Original Message-----
  From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org]On Behalf Of Rick Bazemore
  Sent: Tuesday, March 28, 2006 5:05 AM
  To: pianotech at ptg.org
  Subject: Expanding Action Bracket Symptoms?

   

  I am going to inspect a 1992 Young Chang Grand for a client of mine who is considering purchasing it from the sellers of the house she is buying.  Could someone give me a quick sympton list of Expanding Action Bracket Syndrome?



  Rick Bazemore, RPT
  Social Circle, GA
  www.pianosintune.com
   

  I haven't seen it on a Young Chang yet, but I would imagine the drop screws might be close to scraping the pinblock, the metal of the brackets themselves might show signs of spalling (flaking, cracking), the action spread might be too wide.  It's probably supposed to be close to 112 mm.  (hammer shank flange center pin to wippen center pin).  But the main symptom is probably that the regulation is weird and the piano won't play right, or feel right.  Maybe backchecking is not correct, or hammers are blocking or not dropping - things like that.  

              --David Nereson, RPT
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