[pianotech] stuck keys after one hour of playing

[Ron Nossaman]

A440A at aol.com wrote:
> Barbara sez:
> << He said he's been having some trouble with keys starting to stick <after> 
> he's been playing for a while--like an hour--and then they just won't go.  
> We've made an appointment for me to come out and have a look.  I will check the 
> action centers & keys for friction levels, of course, but this seems sort of 
> unusual--well, I've never been witness to such behaviour, anyway.  Has anyone 
> else experienced such symptoms?  >>
> 
>     Yes.  I feel like something is galling on the center pin, either at the 
> jack or hammershank.  Sometimes, if you take the part off and attempt to 
> forcibly work it back and forth to loosen, the opposite result happens and they lock 
> totally up.  I don't know why, but I have had Yamahas, Samicks, and lots of 
> Renner parts do this.  I repin.  
> Regards,
> 
> 
> Ed Foote RPT 

Ok, this has been mentioned a few times now. The difference is 
that the "seize up" syndrome doesn't go away between playings, 
and come back again after an hour's (or whatever) play. They 
stay seized. So that ain't it - QED.

Barb, after you quiz the perp long enough and from enough 
different directions to discover what's *really* happening, 
and what the likely cause and resulting fix is (are?) I'd be 
surprised if it turns out to be what has been presumed so far. 
Or it's been misreported altogether. Too many missing logical 
connections.
Ron N