Sticking keys

[John Formsma]

Like others have suggested, check for excess friction in the centers.
If you use a gram gauge, you won't be guessing how much friction is
there.  Appearances can be deceiving.

If it's not that, start checking everything else in the most logical
order. The problem will hit you in the face eventually.

For example, I once had a Kawai console with sticking keys, but they
didn't stick consistently. It took what seemed like forever to
diagnose it. I removed wippens and corrected some excess friction, but
that didn't solve it. Different regulation didn't solve it. It turned
out to be not enough clearance between the jack and the letoff rail.
Jacks were being trapped on the rail by the returning hammer butt. And
it LOOKED like (and felt like) there was enough clearance. But moving
the rail was the solution.

JF

On 5/4/07, dbpowell1 at juno.com <dbpowell1 at juno.com> wrote:
>
>
> I have a customer that has a Yamaha console. Two or three notes stick only
> when the damper pedal is used. I have checked the damper lever felt for
> indentions and there OK. Briddle strap wire is clear. Key dip is the same as
> other keys.  I checked a few other things that another Tech suggested but
> nothing seems to stop the sticking. Any ideas will be appreciated.
>
> Dick Powell
>
>