Sticking keys

[Paul McCloud]

Hi, Dick:
            When diagnosing problems like this, I usually start at the
key, and move up the lever chain to the hammer flange.  Lift the wippen,
and see if the key bushings are tight.  If not, then see if the hammer
flanges are free.  Remove one, and swing  the hammer to see how tight
the flange is.  4-6 swings are ok. If the hammer flanges are free, and
the notes still stick, remove the action and see how tight the wippen
flanges are.  Remove one, and see.  You can tell right away if they are
the problem.  Somewhere in all of this, you'll find what you're looking
for.  Also, be sure to check the hammer spring loops.  Yamahas are prone
to breaking those loops.  If they break, the springs are likely to be
bent up too.  Good Luck!
 
            Paul McCloud
 
-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
Behalf Of dbpowell1 at juno.com
Sent: Friday, May 04, 2007 9:57 AM
To: pianotech at ptg.org
Subject: Sticking keys
 
I have a customer that has a Yamaha console. Two or three notes stick
only when the damper pedal is used. I have checked the damper lever felt
for indentions and there OK. Briddle strap wire is clear. Key dip is the
same as other keys.  I checked a few other things that another Tech
suggested but nothing seems to stop the sticking. Any ideas will be
appreciated.
Dick Powell
 
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