[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
After thinking about waiting a week for a new motor I decided to try and
overhaul this one. So I pulled it apart.
The brushes are about 30% gone; no real problem there. However the wires
in the motor were toast near the brush assembly, and the overtemp
breaker in there was welded closed. I would guess the PO overloaded it,
then really overloaded it when the contacts welded.
The commutators were filthy, so I hit them with brake cleaner (the
universal cleaner o' crud) and cleaned out the spaces between the
commutator bars. Should work a lot better if it works at all.
It's possible the problem is that the common wire was shorting against
the field coils; the wire was pretty badly burned. So I clipped it down,
soldered a new wire to the coils and to the common and covered the joint
with thermal shrink tubing. No shorts at this point; I'll wire up the
rest of the show tomorrow morning.
If this totally doesn't work, then it's a shorted half of the field
coil. Maybe I can re-wire it to allow reverse, will have to think about