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Old 10-11-2008, 09:08 PM   #1 (permalink)
WaxyChicken
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Location: Phoenix, AZ
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Stuck on motor dissassembly

Motor specs can be found here:
My Big Fat Baby

before shots:


I've tried disassembling it to check the coils - i'm afraid that after
about 8 months of sitting outside they may be rusted. I already
know i have to change the brushes - they are worn to almost nothing.
The problem i have is that after removing the after-market gear and
the after-market break assembly (apparently it was hooked to a cable
that would stop the motor from freely spinning after shutoff) i'm stuck.

here is the exploded view:


here's where i'm stuck:


(see the exploded view for what the part numbers are)
I can't understand why part 26 "COMMUTATOR END HEAD MACHINED" won't
come off. I've removed all bolts that attach it to part 13 "FRAME AND FIELD ASM"
(the bolts are part 8, there are 4 of them)

The brake rotor (the first 'where i'm stuck' motor pic above) appears to be held on
by a bolt and a large nut (both after market). i can't get part 4 "DRIVE END HEAD MACHINED"
off because the bolt is TACK WELDED to the large nut (about 2 inches)
I've tried channel locks and no luck. (they are bolted to the shaft)

I know that i can get both part 4 and part 26 unattached other wise
because with some work in can twist them independently of part 13.

I'm open for suggestions. i spent 2 hours trying to figure this out.

BTW - i don't need to disassemble it to replace the brushes, just
to check and repair the coils if it's needed. plus there is a
rattle (pebble?) inside that i want to fix.

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