Annoying jiggle sounds reply

[pianoman]

----------
> From: Maxpiano@aol.com
> To: pianotech@ptg.org
> Subject: Annoying jiggle sounds
> Date: Saturday, September 06, 1997 6:51 AM
> 
> List -
Dear Bill,
I have tuned a few of these and it sounds like the polyster noise that you
get from the polysester benches except that it may be louder due to the
amplifiing nature of the piano, very annoying.
James Grebe
> 
> I service a Hyundai grand regularly, that makes an annoying sound
whenever
> any sudden pressure is applied, such as pushing the damper pedal, or in
my
> case pulling/pushing on the tuning hammer.  I've wasted a lot of time
trying
> to find and eliminate it.
> 
> While the piano feels solid on its legs  (not like the cheap American
grands
> that make me jam my knees up against the keybed to hold them in one place
> while tuning), there is an almost unperceptible jiggle started with each
> tuning hammer motion, that the piano then responds with a, "chick, chick,
> chick, chick..." so long you'd swear you had found perpetual motion.  The
> sound is similar to that of a dog walking "tip, tip, tip, tip..." across
a
> hardwood floor
> 
> It comes from the area of the rear leg.  Tightening everything accessible
> (pedestal screws, leg screws, etc) has no effect.  I suspect the
polyester
> finish at the joint in the leg itself.  While the joint appears tight,
could
> their be just enough motion of the finished surfaces against one another
to
> produce this sound?  I wonder whether trying to spray some McLube into
the
> crack might help, but don't want to mess up something that would make
trouble
> later.
> 
> Anyone else ever run into this problem?
> 
> Bill Maxim, RPT