(ET) Further front lift disassembly woes

[Charlie <medievalist gmail com>]

I thought I'd just peel off the plastic coating that the motor
assembly was dipped in at the factory, but it hung on like grim death
- it's not coming off without solvents.  Instead I used a knife and
whittled away enough to get a nut-driver on the long bolts and then
cut around the casing seams.

But I still can't get the guts to come out... basically I have a
one-inch gap I can peer into.   I can't figure out how to release the
worm gear from it's housing, either, and the worm acts like its cut
into the end of the shaft rather than being a separate part.  :(

Do both ends of the casing come off?  Like, does the end plate that
has the electrical connector come off after the bolts are loose?  I
haven't had any luck with it, but I could always use a mallet on it if
it's supposed to come off.

But after blasting out the couple tablespoons of black powder I can
see a set of contacts that look like they're probably held together by
a bimetallic spring, presumably a thermally controlled voltage cutout?
 I can also see that the brushes are about as thick as a piece of
paper, and the commutator is deeply grooved.

If I can find an affordable newly made or NOS replacement for this
motor I should probably replace it.  Otherwise I guess I'm going to be
whittling some new brushes...

--Charlie