damper mechanism squeaks....argh!

[Pianoman]

I have ran into the problem sometimes of the entire bottom board giving 
which causes a noise.  Could it be that?
James
James Grebe   Piano Tuning & Repair   Member of Master Piano Technicians.
Registered Piano Technician of the Piano Technicians Guild for over 30 
years.   "Member of the Year" in 1989
Creator of Handsome Hardwood Caster Cups, Piano Benches, Writing 
Instruments,Table Timepieces
 (314) 608-4137   1526 Raspberry Lane   Arnold, MO 63010
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----- Original Message ----- 
From: <piannaman at aol.com>
To: <pianotech at ptg.org>
Sent: Thursday, December 21, 2006 9:16 AM
Subject: damper mechanism squeaks....argh!


Hi All,

I thought I could solve any damper pedal mechanism squeak, and up until 
recently, I've had pretty good luck.  Then I met a recent model Hallet-Davis 
(Dongbei built, I believe) upright.

I lubricated and tightened everything I could think of.  Here's the list of 
things I tightened and lubed:

Lubed
damper flange centers (protek CLP)
damper springs (teflon powder)
damper lever felt with teflon(two weeks prior) and protek last night
lift rod with protek
all rod tips and linkage w/ special blend

tightened
all screws on the various rails
pedal rod hinge screws
all pedal brackets and fixture screws
all damper flange screws
all available case screws
In addition, I inserted buckskin pieces in places where case parts were 
rubbing and replaced the rubber pieces where the pedal rod inserts into the 
lift rod with buckskin pieces

Noise still there…..argh! It sounds to me like it's the damper lever 
felt/lift rod interface. It doesn't happen when the pedal is first being 
used, say for 20-30 presses of the pedal. Then gradually, the creak comes 
back.

I don't know what else to do. Did I miss anything?  Any ideas?

Dave Stahl

Dave Stahl Piano Service
650-224-3560
dstahlpiano at sbcglobal.net
http://dstahlpiano.net/
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