damper mechanism squeaks....argh!

[William Benjamin]

Dave,

 

I have had a number of Hallet Davis verticals that do what I call creek.  I
found the problem to be the bottom board creaking on the toe rail or the
side of that area.  I put a little felt in there for the bottom panel to
rest on separating the high gloss finish of any two rubbing parts.

 

Hope this helps.

 

 

William

 

 

 

 

 

PIANO BOUTIQUE

William Benjamin

Piano Tuner Extraordinaire

www.pianoboutique.biz

The tuner alone,

preserves the tone.

 

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of piannaman at aol.com
Sent: Thursday, December 21, 2006 10:16 AM
To: pianotech at ptg.org
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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