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MMD > Archives > December 1998 > 1998.12.29 > 07Prev  Next

Replacing Wind Motor Bushings
By Al Pebworth

Matthew Caulfield asked how to re-bush the arms on a wind motor without
having to remove them.  I had the same problem -- how did they do this?
Then one day a little light came on in my head.  They must have put the
arms onto the crankshaft without the bushings, and THEN bushed them.

Here is my procedure:

(1)  Remove the old felt, using a small sharp pointed object.  As the
glue is usually brittle, it comes out without a lot of trouble.

(2)  Clean out any remaining felt, using a small strip of _fine_ sand-
paper cut to go through the opening between the shaft and the wood.
Use CARE, do not overdo this step!  I find that this is seldom needed.

(3)  Tear a strip of bushing cloth wide enough to go around the shaft,
and taper the end so that it can be pushed between the shaft and the
wood.  Insert the pointed end between the shaft and the wood, grabbing
it on the opposite side and pulling it through until the felt wraps
around the shaft.  If the felt is too wide, remove and trim, and try
again, until you have a proper fit.

(4)   When the fit is correct, I remove the cloth and apply a small
amount of "Dag" (Graphite mixed with Denatured Alcohol) on the rod side
of the cloth.  This is just my personal preference.

(5)  Now again pull the cloth through until the cloth wraps around the
shaft, then pull it back the thickness of the arm, apply glue, and
gently pull it forward again.  When the glue is dry, cut flush with the
wood, using a sharp object, such as a single edge razor blade or razor

(6) If the bushing seems too tight, you can gently rotate the arm
around the shaft, applying pressure to the felt as you are turning.
You can also blow in a small amount of "dry" graphite at this time.

I will post pictures of  this procedure on my web site in a few days.
Just go to the "How Do I?" section.

Al Pebworth
Pebworth's Player Piano Center
Home of "Yesterday's Music"

(Message sent Tue 29 Dec 1998, 16:17:45 GMT, from time zone GMT-0500.)

Key Words in Subject:  Bushings, Motor, Replacing, Wind

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