Young Chang

[Dave Nereson]

----- Original Message ----- 
From: "David Ilvedson" <ilvey@sbcglobal.net>
To: <Pianotech@ptg.org>
Sent: Sunday, June 13, 2004 12:45 AM
Subject: Young Chang


> List,
>
> A Young Chang Grand...5' 3" or so....sustain pedal lever has metal
brackets with a wooden lever in between.   Problem:   wobble side to side.
The pin is loose in the metal brackets and goes into a long bushed hole in
the lever.   Typically the pin is fixed in either the bracket or the lever.
Is the metal bracket/pin suppose to be loose?   I pulled the bracket and
compressed it and took care of the wobble but the pin/bracket interface is
strange...
>
> David I.
>
     Does the bracket have a hole in it that's not round?  Some Asian pianos
have nylon inserts (bushings)that sit in the brackets in holes that are
rectangular with rounded ends.  Then the pivot pin for the lever pushes into
the nylon inserts and some pins are threaded on the end and have a wing nut
that keeps it from walking out.  Not sure if Young Chang uses this system or
not, but with metal brackets, this is usually the case.
    It may take 3 months (no kidding) to get the exact nylon inserts from
Young Chang, since they never seem to have anything in California and have
to order it from Korea.  And they haven't heard of airplanes, I guess -- 
everything comes over on the slowest boat.  It's possible that a Yamaha or
Kawai bushing is the same shape & size, but you'd have to rob one off
another piano to compare, I guess.
    Alternative:  Make temporary side brackets from hardwood (if they'll
fit), like they used to in "old school" pianos.
    Can't imagine what else might be going on, without seeing the piano.
Unless something caused the hole in the wood of the lever to wear abnormally
large or oval.           --David Nereson, RPT