Why?

[David Renaud]

The damper springs do add extra force to the wippen,
through the spoon and thus to the key, assisting key return.
Problems with key fitting will therefore be more pronounced
with the sustain pedal depressed.
After installing a new set of key bushings, I always
find some tweaking to do with the pedal down, that
would not be evident if the damper springs were
assisting the return.

                       Dave Renaud
                       RPT
                       Canada

Phil Bondi wrote:

> I have no idea why this worked today, but it did.
>
> Un-named new vertical (not important) with a note that stuck only when the
> damper pedal was depressed.
>
> The note played just fine until the damper pedal was depressed.
>
> With the damper pedal depressed, I lifted the whippen to get the action
> moving without the key..it responded normally..as soon as I pressed the key
> with the damper pedal still engaged, the key stuck down.
>
> I eased the front rail bushing and lubed the pin with my new choice of
> lubricant (r.i.p. protec) and the darn thing worked fine.
>
> Is there something I missed in my trouble-shooting that will cause this
> problem to surface again?..and why would this note only stick when the
> damper pedal was depressed?
>
> scratching my head,
> roo(k)