[AT] Generator wiring question

Bill Brueck b2 at chooka.net
Sat Aug 7 12:43:49 PDT 2004


Greg, using this as a puller would imply that it won't be out there running
for a long period of time.  Indeed, just about all the tractors we all deal
with on this list are pretty well retired from doing long days of work, with
the possible exception of my buzz saw tractor for a few weeks in the fall.

Anyway, I'd do as Cecil suggests more from the standpoint of wanting it to
be "right", but as a practical matter you can just ground that terminal and
forget it.  You won't warm your battery up enough to hurt anything in the
30 - 60 minutes at a time that you have it running.

While I'm not specifically familiar with your generator by application, if
it's a 3-brush model with an adjustable third brush, you can set it back a
bit so it charges a little less.  The further away the brush is from the
closest other brush the lower the charging rate.  Most applications you can
losen the locking screw and stick your fingers in there and move that brush
while the tractor is running so you can just watch your ammeter and set it
as you wish.  That was probably a dumb suggestion; if you're not familiar
with the adjustment do it without the tractor running first so you learn not
to stick your fingers in there TOO far, LOL.

B²
Bill Brueck (brick)
Chatfield, Minnesota USA

Confusion is a higher state of knowledge than ignorance.
----- Original Message ----- 
From: "Easley, Greg" <EasleyG at health.missouri.edu>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Saturday, August 07, 2004 12:50 PM
Subject: RE: [AT] Generator wiring question


Thanks Cecil - This one is going to be used strictly on the pulling track.
It would be nice for the charging system to work.  I think I'll put a SPST
toggle switch on the dash for manual control of the field circuit.

Greg



        On tractors with cut-outs, the Field wire normally connected
to the light switch. The terminal it connected  to took the circuit
to ground thru a low ohmage resistor - approx 2.5 ohms or so - and
this gave a charge rate of somewhere under 10 amps. Pulling out on the
light switch turned on the lights and took the Field circuit straight
to ground. This is what is called "full fielding the generator". The
third position on the light switch on some tractors did the same thing
without turning on the lights in case you wanted to hit the battery
with a heavy charge rate. It would not be advisable to charge at full
charge all the time as it could damage the battery. If it were mine, and
the tractor had lights, I would be tempted to wire it the right way -
thru the light switch to ground when the switch was pulled out. If you don't
have any lights on the tractor and just use the starter occasionally,
I suppose you could just leave the wire off the Field post on the generator
and use a jumper wire when you want to charge the battery by clipping one
end to the Field and the other to ground. Charge the battery for a half
hour or so and then take the jumper off.

Cecil
--
The nicest thing about telling the truth is you never have to wonder
what you said.

Cecil E Monson
Lucille Hand-Monson
Mountainville, New York   Just a little east of the North Pole

Allis Chalmers tractors and equipment

Free advice

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