[pianotech] sticking key

[Paul McCloud]

Ed:

                The key is helped to return by the weight of the damper.  If
you hold it up with the damper pedal, it can't return as readily.  There is
some friction somewhere that is not apparent unless you press the pedal.
You have just discovered a way to check for friction when you have a sticky
key- press the pedal.  This is how you isolate the problem.  Remove the
action and inspect the hammer flanges.  Lift the hammers and see if the
sticky note's hammer is slow.  Check the wippen flange.  Try to see anything
different about the action in that note.  Usually, something tells you right
away what the problem is.

                Good luck.          

                Paul McCloud

                San Diego

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ed Carwithen
Sent: Wednesday, October 21, 2009 4:37 PM
To: Piano Tech List
Subject: [pianotech] sticking key

 


The piano is a small (4'5") Wurlitzer grand.  I tuned it in August.  The
player is complaining that one of the notes sticks when the damper pedal is
in use.  Can anyone think why this might be happening?  I'll be going back
to check it in a couple of days.

 

Ed Carwithen

John Day, OR

 

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