squeeky damper springs

[David Ilvedson]

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I agree with David.   Very heavy pedal action.  The bolts through the b=
ottom board is a good repair though, could be shorter...;-]
I'd love to hear if Don Mannino knows why Kawai did this?   What was th=
e thinking behind it...is this continued in newer Kawais?
David Ilvedson, RPT
Pacifica, California






Original message
From: "Porritt, David" 
To: "Pianotech List" 
Received: 2/2/2006 11:46:44 AM
Subject: RE: squeeky damper springs


Barbara:
 
First, I really dislike this pedal setup that Kawai used =96 I think it=
=92s in some Boston=92s too.  There are LOTS of places to squeak.  In a=
ddition to the overly complex mechanism you show in this picture, there=
 are the usual lifter-rod-on-the-damper-lever-felts, the lifter rod bus=
hings etc.  If the metal is corroded no lubricant that I=92m familiar w=
ith will help.  Polishing all those friction points and then lubricatin=
g is the only thing that will help.  The metal that shows in the pictur=
e appears corroded so I=92d guess that the lifter rod and flanges could=
 well be corroded as well.
 
Good luck!
 
dp
 
David M. Porritt
dporritt@smu.edu



From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On B=
ehalf Of Barbara Richmond
Sent: Thursday, February 02, 2006 11:23 AM
To: Pianotech
Subject: squeeky damper springs
 
Hey folks,
 
I serviced this Kawai UST-7 (built in 1983) before Christmas.  At the t=
ime, the bolts had already been installed by someone else to hold the d=
amper pedal down, and I tightened the screws for the (right side) dampe=
r trap lever assembly to keep it from blasting off.  Miracle cure!  Ah,=
 but there was still noise, I treated the damper spring felts with Prot=
ek--which seemed to take care of the squeaks.  I was hoping that would =
be the other miracle cure.
 
I went back to take a picture of the pedal assembly, which is a little =
different.  The damper pedal pulls down two levers--one to the right, t=
enor & treble, and one to the left, the bass.   Could it be this set-up=
 that makes the pedal feel somewhat stiff?  It would make sense, since =
two trap lever springs are being pushed down.  I didn't notice a stiff =
damper spring feel in the action itself (after I lubed the spring felt)=
.  
 
When I went back to take the picture last week, I noticed that the sque=
aking is back.  I'll admit it, I was in a hurry and didn't take a close=
 look at the felts.  I suppose cleaning the damper springs and replacin=
g the spring felt is next.  Is there a different (faster) solution--lik=
e some miracle lubricant I haven't heard of that came on the market whi=
le I was on leave?
 
Thanks.
 
Barbara Richmond

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