Wurlitzer Broken Damper Springs

Tom Robinson tomnjan@bellsouth.net
Tue, 16 May 2000 21:13:08 -0400


Original Post:
The problem, damper rod lift just enough to clear strings
with pedal bottomed (of course....damper motion reminds me of my Navy
days)..  Curiosity.....No fewer than 5 broken damper springs in
scattered notes.

Responses:
<Probably rodent urine on the damper springs is the cause>  Patrick

<As for the dampers not lifting very far, is it just that the pelican
spring
is bending too far?  Or is the bottom board flexing a lot? Don't you
just "love" spinets???
Brian Trout>

<Sometimes the pelican spring is almost ready to break and flexes enough

where it will eventually break.  Hard to spot.  Joe Goss>

Today was the day I tackled the Wurly.  I arrived at the scene armed
with the advice from Patrick, Brian, and Joe.  Removed keys, then
action.  Closer investigation revealed that several hammer return
springs were out of place, and damper springs that I thought were
broken, were actually just disengaged.   It's not difficult to envision
that a mouse could displace hammer return springs, but damper
springs........a whole 'nuther ball game.  I corrected these problems
and turned my attention to the trapwork.  I found no evidence of mouse
urine on any of the springs.  (BTW, my knowledge of Latin is courtesy of
Warner Bros.  :-))

Some previous repair person (homo-handi-jackshinolus) had apparently
trimmed both grommets on either end of the damper actuating rod to
shorten the actuating length.  I shimmed to gain the appropriate damper
pedal action.  That is when I noticed most of the monochords were
singing.  Closer check revealed the damper felts were hard.  Apparently
this was the problem the previous repair person was attempting to
correct in a misguided way.  I readjusted the pedal regulation just
enough to stop the majority of the singing, which still gave acceptable
pedal regulation.  I will replace/adjust these dampers at the next
tuning.  On this piano, I learned the value of careful observation, and
to expect the unexpected.  And, thanks to a bountiful supply of this
genus in my area, I'm down to less than 40 minutes on action removal and
replacement.

And, best of all, I arrived on the job with confidence that I could
solve the problems in a timely fashion, thanks to help from
experts.....who shall remain anonymous to my customers......heh, heh.
It was a great feeling.  The customer is happy, with the work.....and is
extremely relieved to be rid of the mouse evidence.  I am thankful for
this forum and for those who make it such a great resource for me.

Tom Robinson
East Tennessee



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