Bob F wrote:
My old craftsman shop vac started to smell "hot", like the motor was burning
out. I removed the top cap over the motor, and verified that the brushes were
fine. On further inspection, I discovered that there were two wires that had
broken loose from their commutator connection. I carefully heated the wire end
with my soldering iron, then scraped the insulation with a knife, and scraped
the connection point on the commutator, and then soldered them back in place. It
now seems to be working fine. FWIW.




Over the years I've reconnected windings to commutator bars on several
failed power tool motors.

In each case I wound several turns of thin string wet with epoxy around
the armature adjacent to the commutator, to keep all the wires secured.

Worked for me...

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.98*10^14 fathoms per fortnight.