[AT] [Farmall] Super M generator belt / tensioning bracket

[Gene Dotson]

    I just finished the 12 volt conversion on my Case LA. The repair shop 
replaced the 6 volt fields with 12 volt fields. It is an Auto-Lite generator 
and the 12 volt fields came from Ace and is part number 145 from them. This 
generator is the same as used on SC and DC tractors, so this may be of use 
to some others. The original regulator was used as mounted on the generator 
and adjusted to 23.6 volts, so installation uses the same wire to the 
ammater. I replaced the ammeter while I was doing the change. The battery is 
a group 31 with center posts and replaces the original group 4, 6 volt 
battery. This tractor has been built up with 4 7/8 sleeves and LP head for 
about 90 horsepower, so the original 6 volt was not up to the task of 
starting the engine. Cranks over very good now.

                        Gene



----- Original Message ----- 
From: "Mike Sloane" <mikesloane at verizon.net>
To: <farmall at lists.antique-tractor.com>; "Antique tractor email discussion 
group" <at at lists.antique-tractor.com>
Sent: Sunday, June 26, 2011 5:48 PM
Subject: Re: [AT] [Farmall] Super M generator belt / tensioning bracket


> Your voltage regulator might need a little adjustment. When properly
> set, you should be seeing 13.6 volts at the battery when the engine is
> running at "high idle". At idle, those old tractor would often not be
> able to keep up with the ignition system drain. That is one reason why a
> alternator is generally a better choice than a generator for a charging
> circuit. I am sure that others will have their own thoughts on this...
>
> Mike
>
> On 6/26/2011 3:15 PM, Dean Vinson wrote:
>
>>
>> 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
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