[pianotech] sluggish jacks

[Sig]

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.

On Wed, Jul 13, 2011 at 6:14 PM, David Weiss <davidweiss at embarqmail.com>wrote:

> List,
>
> I received a call to look at a Baldwin baby grand with sluggish action.
>  The
> piano was rebuilt about 10 years ago, with Renner parts.  A Dampp Chaser
> system was installed at the time of the rebuild.
>
> About 6 months ago the owner noticed about one octave of sluggish notes.
>  He
> called another technician who came out and lubricated the jack flanges.  It
> didn't help and more notes started getting sluggish.  He called the other
> tech back, who lubricated again.  The owner said after the second round of
> lubricating the problem was even worse.  I don't know what the other tech
> used to lubricate, but I'm assuming it was Protec.
>
> I looked at the action today and the jack flanges are really tight.  Some
> notes will play once, other notes will not even play one time, the jack
> being stuck in the forward position.  All the other flanges in the action
> are fine.
>
> I'm trying to figure out why this happened.  The house is modern with
> reasonably good climate control.  They heat and cool like most people in my
> area.  They don't leave windows open a lot.  There have been no unusual
> events, such as burst pipes, broken air conditioners, etc.  The piano has
> been in the same spot for 10 years, and seems to have been fine for the
> first 9 years.
>
> I gave the owner a quote for re-pinning the jack flanges.  But two
> questions
> linger.  If I re-pin, will the problem re-occur; and why did this happen in
> the first place.
>
> Thanks for your input,
>
> David Weiss
>
>
>
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