jack center pin bushing

[Brian Trout]

Hi, Keith,

I had one a while back that almost stumped me.  Small Wurlitzer (Samick)
Grand. Customer complained about dead keys, and poor or non-existent
repetition.  I checked the key bushings, not tight.  checked the balance
holes, not tight.  Checked the jack pinning, not tight.  Checked the jack
alignments, all good.  Checked repetition springs, all in a 'normal range'.
Wippen and hammer flanges all free.   What was it???  It had me scratching
my head for a bit.  It was tight centers on the repetition levers.  A little
protec, and a bit of regulation had it working freely again.  Haven't heard
from them since.  I guess we can't take anything for granted, can we?  :-)

FWIW.

Brian Trout
Quarryville, PA
btrout@desupernet.net


-----Original Message-----
From: kam544@flash.net <kam544@flash.net>
To: pianotech@ptg.org <pianotech@ptg.org>
Date: Thursday, August 12, 1999 9:09 PM
Subject: jack center pin bushing


>List,
>
>Had a funny thing happen yesterday on a 1971 Yamaha Grand that I have
>serviced for the last 21 years.  Actually had to use Protek on one jack
>center pin bushings to free up a little sluggishness.  Wouldn't repeat.
>What a monumental undertaking.  :-))))
>
>I service numerous Yamahas, and that was a first for me.  Tickled my funny
>bone having to do that when some other makes I service require lots of
>Protek from time to time.
>
>Just wanted to share the incredibile reliability of this Yamaha piano.
>
> Keith McGavern
>kam544@flash.net
>Registered Piano Technician
>Oklahoma Chapter 731
>Piano Technicians Guild
>USA
>
>
>