Phil wrote:

Low speed , it is quiet, higher speed , rattles, I balanced the wobble
out of it years ago, have a 18" down shaft on the fan, checked the blades,
pushed up and down on the fan blades, arms, in the center of the motor
and have the play there.


This probably means the bearings are shot. It is probably not
real easy to take apart. You may need an arbor press and
some pushing rings to get the bearings off and new ones on.

Jon