sluggish centers

[Joe And Penny Goss]

Hi Dave,
They are usually pinned to a much looser tolerance to begin with.
Joe Goss RPT
Mother Goose Tools
imatunr@srvinet.com
www.mothergoosetools.com
----- Original Message ----- 
From: "Dave Nereson" <davner@kaosol.net>
To: <pianotech@ptg.org>
Sent: Friday, November 05, 2004 8:17 PM
Subject: sluggish centers


>       Went to tune a lady's Baldwin spinet (not Acrosonic, but doesn't
> matter) and after hitting the soft pedal, most of the hammers drifted back
> very slowly.  It had changed climates and the action centers were
sluggish.
> I've encountered this many times before.
>     But what I don't get is:  why is it almost always remedied by
shrinking
> only the hammer-butt center-pin bushings?  Don't all the other center pin
> bushings swell as well  (or flanges shrink, whatever the case may be)?
>     I applied about 1:4 alcohol to water to all the hammer flange
bushings,
> let it dry, and that freed them up pretty well, as it usually does.  Still
> had to re-pin a few.  But why aren't all the jacks, wippens, and dampers
> sluggish also?
>     --David Nereson, RPT
>
>
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