Jack Slipping?

Robert Goodale rrg@unlv.edu
Fri, 03 May 2002 14:46:42 -0700


The jack is too far forward- no douts here.

Rob Goodale, RPT
Las Vegas, NV

Greg Casper wrote:

> I just got back from a customer who has a Kawai grand with one key they said
> wasn't working. Turns out it works pretty well UNLESS you strike the key
> hard. When you do that, the hammer barely even moves. It looks to me like
> the jack is sitting too far forward on the knuckle, but since I didn't have
> a jack screw adjusting tool with me (this was ONLY supposed to be a tuning..
> and stupid me didn't take all the tools) I couldn't regulate that out to
> determine if that's the ONLY issue. Any opinions on what else might cause
> this situation? The backcheck almost seemed to be catching the hammer on
> it's way UP to the strings, but since it's only happening on a strong blow
> to the key I think it just LOOKS like it's catching, since there is almost
> no upward movement of the hammer when this occurs. Ideas?
>
> Greg Casper
> San Jose, CA



This PTG archive page provided courtesy of Moy Piano Service, LLC