[CAUT] Una chorda shift "click"

[Paul T Williams]

Hi all,

Our Steinway D in one of our halls has a weird clicking or groaning noise 
with the unacorda shift movement.  It makes a "click" or something like it 
when pushing the pedal down.  It is minimal when pushing quickly, but is 
very noticable on a slow push.  It's also even more noticable on pushing 
and releasing the pedal.

I sanded and lubed the right side of the key-frame, and also polished the 
return spring, but it only went away slightly. It sounds like that is 
where the sound is occurring.  The lyre action is not where it's 
happening, so where might I look next?

Thanks
Paul
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