[GreenKeys] 28 motor repair

[Ethan Blanton]

John, W9DDD wrote:
> So, should I buy some of the fancy wire used as motor leads and re-do the
> wires on the motor myself.  Or take it to a motor shop and let them do it
> for a lot of dollars.  Are they gonna talk me into bearings and some other
> extra things, ya know just in case?

My solution to this problem is here, search for "Motor Unit":

https://kb8ojh.net/station/teletype/

I had a very similar situation, removing and cleaning various parts
led to cracked motor wiring; in my case, I noticed not because I saw
the cracks, but because it started tripping the GFCI.  I disassembled
the motor far enough to remove the rotor and get to the ends of the
winding, and covered over with shrink tubing.  It's not a perfect fix
(it's kind of ugly, and the insulation lashed into motor the windings
is just as brittle -- if less mobile), but a decade or so later that
TTY is still running strong -- it's now in my office on campus, and I
demo the Model 28 for students or other faculty members a few times a
semester.

> I've seen the insides of perhaps a 100 5-200 HP motors over the years and
> those wouldn't scare me, but I suspect this little 1/20 HP might be a little
> more challenging.

It's not as bad as you think!

Ethan