fixing clicking knuckles

[holly quigley]

I did think about the pinning - it's inconsistent and I intend to remedy
that. But, the fact that some of the clickers have five swings and some have
nine in them I think eliminates that blame.
And the knuckles were actually a spongy deformed flattened mess with the
buckskin gapping way away when I squeezed 'em. Just as a point of future
reference, when you say "hard," is it a brittle feeling across the surface
of the knuckle? Because new knuckles are quite firm and tight feeling - I
don't know if I've come across hardened knuckles yet.
Thanks,
Holly

---------- Forwarded message ----------
From: "David Ilvedson" <ilvey at sbcglobal.net>
To: pianotech at ptg.org
Date: Fri, 4 Jul 2008 19:11:47 -0700
Subject: RE: fixing clicking knuckles

"Shanks still attached to the action"....check your pinning on the
clickers...hot hide glue or titebond trim and molding would be a better
choice...you don't need much glue, especially if you have a good fit...

Question:   you were changing the knuckles because the old ones were hard?


David Ilvedson, RPT
Pacifica, CA 94044


 ------------------------------
 Original message
From: "holly quigley"
To: pianotech at ptg.org
Received: 7/4/2008 4:58:56 PM
Subject: fixing clicking knuckles

Well, I guess I screwed up. I installed a new set of knuckles on a piano,
and now several of them click. I did some archive research and verified that
the source of my clicking is very likely that the outside of the knuckles
got glued just fine, but the cores lost contact with the base of the slots
in the course of the glue drying. I'm pretty disgusted and frustrated with
myself, and trying to just move forward proactively to get the job done
right. My question for the list is, what is the best way to fix this? What I
think happened is that in the course of installing the knuckles, I had them
pressed into the slots clean and snug, but as I don't have a long term
clamping system that won't distort the knuckles (does one exist, by the
way?), as the glue dried the core pulled out of the slot slightly. (I did
check the knuckles dry first, and the cores appeared to fit all the way in
the slots, and were quite snug, before anyone asks) Should I try an
expanding glue like Gorilla Glue here? Or go to CA glue which will hopefully
dry faster? Or should I have just not pressed the knuckles so tightly that
the (yellow) glue all slipped out of the slot? This isn't the first knuckle
replacement I've done, but it's the first one I've done with the shanks
still attached to the action.

It's times like this that I get overwhelmed by having learned enough early
on that now I'm employed by a boss who speaks highly of me and puts me on
jobs like this. Most of the time it's great, but I do miss the safety net of
being under a wing. :(

Thanks in advance, and wishing everyone who's celebrating a happy
Independence Day,
Holly Quigley
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080704/13daf8bb/attachment.html