Yamaha damper question

[Richard Brekne]

Just to satisfy my curiousity Clyde.... were the bushing treated with
graphite ?

RicB

Clyde Hollinger wrote:

> Friends,
>
> Earlier this week I received a complaint that a key was sticking on a
> 1976 Yamaha G2 grand piano.  When I arrived I diagnosed the problem as
> the D#4 damper not returning to rest on the strings after the note was
> played.  I replaced the center pin holding the damper lever to the
> damper lever wire flange and all was fine.  The same thing had happened
> to the neighboring D4 damper three years ago.
>
> The removed pin looked discolored where it rotated in the felt bushing,
> so I decided to check it out under a microscope and see if I could learn
> something.  Some friends have a cheap one, but it served to show me that
> the center pin appeared to be deeply scratched around the pin.
>
> Now to my questions:  Is this a case of flaking plating that I heard
> about?  If not, what is likely the problem?  Are the center pins I buy
> from Schaff plated as well?  Will this become a chronic problem for this
> particular piano?  If so, is there any preventive measure I can take
> without replacing that center pin in every damper?
>
> Thanks,
> Clyde Hollinger, RPT




--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html