The birdseye in the jack may be binding with the whipen. Take the pin out and file a small amount on the birds eye or the wood that holds the bushing.This happens sometimes with jacks in upright pianos. <br><br><div class="gmail_quote">
On Wed, Jul 13, 2011 at 6:14 PM, David Weiss <span dir="ltr"><<a href="mailto:davidweiss@embarqmail.com">davidweiss@embarqmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
List,<br>
<br>
I received a call to look at a Baldwin baby grand with sluggish action. The<br>
piano was rebuilt about 10 years ago, with Renner parts. A Dampp Chaser<br>
system was installed at the time of the rebuild.<br>
<br>
About 6 months ago the owner noticed about one octave of sluggish notes. He<br>
called another technician who came out and lubricated the jack flanges. It<br>
didn't help and more notes started getting sluggish. He called the other<br>
tech back, who lubricated again. The owner said after the second round of<br>
lubricating the problem was even worse. I don't know what the other tech<br>
used to lubricate, but I'm assuming it was Protec.<br>
<br>
I looked at the action today and the jack flanges are really tight. Some<br>
notes will play once, other notes will not even play one time, the jack<br>
being stuck in the forward position. All the other flanges in the action<br>
are fine.<br>
<br>
I'm trying to figure out why this happened. The house is modern with<br>
reasonably good climate control. They heat and cool like most people in my<br>
area. They don't leave windows open a lot. There have been no unusual<br>
events, such as burst pipes, broken air conditioners, etc. The piano has<br>
been in the same spot for 10 years, and seems to have been fine for the<br>
first 9 years.<br>
<br>
I gave the owner a quote for re-pinning the jack flanges. But two questions<br>
linger. If I re-pin, will the problem re-occur; and why did this happen in<br>
the first place.<br>
<br>
Thanks for your input,<br>
<font color="#888888"><br>
David Weiss<br>
<br>
<br>
</font></blockquote></div><br>