[pianotech] Joe Garrett's recipe for TP bushings

[David Love]

My guess is that when backing off the pin the bushing rose up with it but
didn't settle back down when the pin was turned down.  It probably doesn't
matter functionally.  You could, if you want, remove the string from the pin
and tap the bushing down using a becket breaking tool or something similar
that will slip over the tuning pin.  Don't know if I'd bother though.  

I believe Ron Overs glues in the tuning pin bushings when they are
installed.  Whether that aids in preventing cracking I don't know, but it
will prevent them from rising up when you back out a tuning pin.

My own experience with tuning pin bushings is that they don't split if they
are a tight fit, tight enough that they need to be slightly driven into the
plate.  If you can insert them with your fingers, they are too loose and
will split.  If they are driven and thereby slightly compressed they won't.


David Love
www.davidlovepianos.com


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Bruce Browning - The Piano Tuner
Sent: Saturday, December 06, 2008 5:43 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Joe Garrett's recipe for TP bushings

Hi Lis
I've recently been tuning a Yamaha C3, fairly old, and some previous
tuners have replaced broken treble strings. The tuning pin bushings seem
to have risen up, proud of the plate, on these pins only, by about
3mm.-4mm.
What could be the cause of this, and should I be concerned.
Bruce Browning
The Piano Tuner.