Expanding Action Bracket Symptoms?

[David Nereson]

-----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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