[AT] SM vs 450 generator

[Dean Vinson]

Hi John, good question.  Sure sounds possible, and if the mounting brackets
are the same on the 450 as they were on the M and Super M I'd say that'd be
an easy way to go about it.  I can't easily check for part numbers on the
generator, though, since I've already got the hood back on and I've gotten
enough exercise with that particular procedure this week already.  I'm quite
tall but it's still a chore to lift that hood up and over.  (And unlike my
previous and nicely weathered old M, this tractor is all shiny and clean so
I'd be most annoyed with myself if I accidentally drug the corner of that
hood over the top of the grille or scratched the side of the hood against
the remote hydraulic valve rod, or otherwise dinged something up.  :)

But that said, I sort of suspect it's the original generator or another M or
SM generator that's been rewound.  There's a big resistor in front of the
coil which I assume is there to drop the voltage back down to 6 at the coil.
Seems like if somebody was taking parts from a 450 they'd have swapped the
coil also?  Just a gut feeling, I don't know.

Dean Vinson
Dayton, Ohio
www.vinsonfarm.net


-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of John Slavin
Sent: Monday, June 27, 2011 12:29 PM
To: at at lists.antique-tractor.com
Subject: Re: [AT] AT Digest, Vol 88, Issue 17

Dean:  My 450 had 12 positive ground system from the factory, I assume.  At
least it's always been that way from the time my dad bought it in 1958 when
it was 6 months old.  Given the similarity between the 450 and the super M,
would it have been possible that someone swapped out some parts from a 450
to your Super M?  Are there part numbers on your generator?

John Slavin


> On the subject of the 12 volt conversion, Dudley, you'd asked about
> generator vs. alternator.  It's a   generator and looks original.  I
tested
> voltage today at the battery both before and after adjusting the pulley.
> With the engine off and lights off, voltage was an even 12.0.  Turning the
> lights on brought it down to 11.7 volts.  With the engine on but lights
off,
> voltage was an even 13.0, and with the engine on and lights on, voltage
was
> 12.6.  The readings were the same after adjusting the pulley.  The 13.0V
> reading with the engine running but lights off means the generator was
> re-wound for the 12-volt conversion, correct?
> 
> Dean Vinson
> Dayton, Ohio
> www.vinsonfarm.net