[AJD] Delco generator 1102761??

Sun Nov 13 08:20:32 PST 2005

Bill:

Yep, I suffered from my rectal/cranial inversion syndrome when I was trying
to explain that the generator looked more like an early numbered series
generator than a letter series generator. The removable band does typically
indicate a two brush generator. What I was trying to describe was that this
particular generator has fins on the pulley which, if I recall properly,
didn't show up until the 12V generators used on the first numbered series
tractors. My syndrome may be showing up again. 

I can totally relate to the grey hair and teeth issues. I broke out a 6
tooth bridge on my upper last week. The anchor teeth broke off at the gum
line. I'm now the toothless wonder! The remaining good upper teeth get
pulled this Wednesday and a full denture goes in immediately!  Oh joy!  I
have tried desperately to avoid this but the time has come. Not looking
forward to it all. Sure wish I could find some NOS parts!  :-) 

Dean A. Van Peursem
Snohomish, WA 98290

Forbidden fruits create many jams!

www.deerelegacy.com

http://members.cox.net/classicweb/email.htm

-----Original Message-----
From: antique-johndeere-bounces at lists.antique-tractor.com
[mailto:antique-johndeere-bounces at lists.antique-tractor.com] On Behalf Of
Bill Brueck
Sent: Sunday, November 13, 2005 5:40 AM
To: 'Antique John Deere mailing list'
Subject: RE: [AJD] Delco generator 1102761??

Yes, the smaller pulley on the ag/industrial engines helped a lot to get
that generator RPM up.  The problem was to get the generator to start in the
first place.  The generator depends upon the residual magnetism in the case
and pole shoes to get excited.  Once excited it carries itself just fine.
This became a bigger problem with alternators, where the field essentially
moved to the armature and the case contained the generating coils.  I bought
a JD B a while back that someone had tried to convert to alternator and
never got it running for this reason.  I added a push button to the dash of
the tractor to manually excite the rotor, just pushed it once after the
tractor was started and the alternator worked fine.

That extra winding I spoke of was not OEM spec, it was our little
contribution to the cause.  We also added extra paper between the windings
where they were crossed and thus stressed at the non-commutator end.  Not
something you could do with an automated winder, I expect, but ours was a
home made unit, long predated me.  It was a nice product we put out.  Of
course, the major cause of armature failure was still the run-away voltage
regulator, nothing could withstand that load and ours would burn up when
that happened, too.

It sticks in my mind that the generators with bands were usually the 3-brush
model.  I expect there was a 2-brusher along in there that I've forgotten
about.  Just don't replace one with the other unless you match the regulator
/ cutout.  You can wire a regulator to just use the cutout in a pinch, but
you can't go the other way.  I got my father in law's MD Farmall going this
past couple of years by mounting an old voltage regulator and just using the
cutout circuit.  He had somebody local work on it for him and they had it
all crossed up.

Ah, the advantages of gray hair and missing teeth!

B²

Bill Brueck (brick)
Chatfield, MN, USA

Confusion is a higher state of knowledge than ignorance.

-----Original Message-----
From: antique-johndeere-bounces at lists.antique-tractor.com
[mailto:antique-johndeere-bounces at lists.antique-tractor.com] On Behalf Of
Dean VP
Sent: Sunday, November 13, 2005 1:06 AM
To: 'Antique John Deere mailing list'
Subject: RE: [AJD] Delco generator 1102761??

Bill:

Thanks for the reply. I had looked up the particular Delco # in the JD book
that Duane mentioned but it isn't there. I didn't know if they changed the
generators for the difference in rpm's between a car and a two cylinder
tractor but maybe that was handled with the pulley ratio's. The end plate
difference is noticeable. This particular one has the band around it to
protect the brushes, etc. It actually looks more like the 12 V generators
used on the first numbered series JD's. 

Dean A. Van Peursem
Snohomish, WA 98290

Forbidden fruits create many jams!

www.deerelegacy.com

http://members.cox.net/classicweb/email.htm

-----Original Message-----
From: antique-johndeere-bounces at lists.antique-tractor.com
[mailto:antique-johndeere-bounces at lists.antique-tractor.com] On Behalf Of
Bill Brueck
Sent: Saturday, November 12, 2005 9:31 PM
To: 'Antique John Deere mailing list'
Subject: RE: [AJD] Delco generator 1102761??

I thought the auto and tractor generators of that vintage were electrically
interchangeable but the end plates were different; the automotive
applications were open for lots of air flow, the tractors were usually more
enclosed to limit dust buildup.  I worked in an auto electric shop in the
60's and we used the same armatures in both, and perhaps the same field
coils, although we so seldom had to replace field coils I am not so sure
about that.  We wound our own armatures and actually wound the tractor ones
with an extra winding, that made them cut in a little better at slower
speeds.  But they were still interchangeable when we didn't have the right
one built up. 

So my expectation is that a generator off a 6v Chevy would work fine in a
voltage-regulated Deere, but to the critical eye it wouldn't be original.
Be sure and polarize it, the Chevy would be neg ground and the Deere
positive.

Been a lot of water under the bridge since then and I've been known to
forget a few things, so feel free to jump in with contrasting opinions.

B²

Bill Brueck (brick)
Chatfield, MN, USA

Confusion is a higher state of knowledge than ignorance.

-----Original Message-----
From: antique-johndeere-bounces at lists.antique-tractor.com
[mailto:antique-johndeere-bounces at lists.antique-tractor.com] On Behalf Of
Dean VP
Sent: Saturday, November 12, 2005 10:35 PM
To: AT JD; AT JD
Subject: [AJD] Delco generator 1102761??

Does anyone on the list know if this 6V Generator was ever used on JD 2
cylinder tractors? I know it was used on a 1951 Chevy?

Dean A. Van Peursem
Snohomish, WA 98290

Forbidden fruits create many jams!

www.deerelegacy.com

http://members.cox.net/classicweb/email.htm

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