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<DIV><FONT size=2><STRONG>From the Yamaha website serial # search
utility:</STRONG></FONT></DIV>
<DIV><FONT size=2><STRONG></STRONG></FONT> </DIV>
<DIV><FONT size=2><STRONG>Serial Number <FONT color=blue>3894763
</FONT></STRONG></FONT><FONT face=Arial color=#000000><FONT =
size=2><STRONG>does
NOT appear to be built for the U.S. market.</STRONG></FONT></FONT></DIV>
<DIV><FONT face=Arial color=#000000><FONT face=Arial =
color=#000000 size=2>For
additional information call (800) 854-1569</FONT></FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=mark@nhpianos.com href="mailto:mark@nhpianos.com">Mark =
Dierauf</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">pianotech</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, May 04, 2001 8:06 =
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> CP contamination on =
Yamaha S
400-B</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2> I had a customer complain =
about the touch
on their Yamaha grand and discovered that it weighted off at 66 grams =
at
middle C. When I checked the hammer flange I found that I could only =
get one
swing, and that the bushings had a black residue on them. Closer =
inspection
showed that this residue was also on the center pins as well as =
slightly in
the wood surrounding the bushings. The residue on the pins themselves =
rubbed
right off, and the pins looked shiny and new without any signs of =
buildup or
corrosion. I repinned one to normal tolerances and the cloth felt =
as if
it had normal resiliency, and the downweight dropped by 11 grams. =
I also
found that the wippen flanges had the same residue, but hadn't seized =
up the
way the the hammer flanges had. They seemed to be *slightly* on the =
tight side
but still within normal tolerances (I didn't have my little spring =
gage with
me). The jack & rep lever bushings were normal bright red cloth, =
and
perfectly free.</FONT></DIV>
<DIV><FONT face=Arial size=2> I have an appointment to =
return and repin
this action, but before I do I wondered if anyone else has run across =
this
before. Could this be something that Yamaha did at the factory? =
although
I've certainly never seen it in their other grands, this is the first =
S series
grand that I've serviced. The customer bought it used last year and so =
doesn't
know it's history. Does anyone know of any center pin lubricants that =
react in
this way? Is the problem likely to return after repinning? The serial =
# is:
</FONT><FONT face=Arial size=2>U3894763</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks, </FONT></DIV>
<DIV><FONT face=Arial size=2>Mark
Dierauf</FONT></DIV></BLOCKQUOTE></BODY></HTML>