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Converting a Farmall A to 12 volt

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history guy

06-05-2007 20:20:02

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What all would be needed to convert a Farmall A to 12 volt and where would I get all these parts? Thank you for your time.

Aaron

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John T

06-06-2007 05:00:57

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Re: Converting a Farmall A to 12 volt in reply to history guy, 06-05-2007 20:20:02

History, its your tractor and your choice if you wanna convert. If starting is a problem but you still wanna stay at 6 volts I recommend the biggest heaviest highest rated 6 volt battery that can physically fit into the battery compartment and the use of 00 Gauge battery n starter n ground cables.

If converting to 12 volts you can EITHER keep the existing 6 volt coil (assuming its a distributor not a mag ignition) and add an external series voltage dropping (12 to 6) ballast resistor after the ignition switch ahead of the coil OR ELSE buy a full true 12 volt coil (some people call internally ballasted) no external ballast required.

If you change polarity like from Pos to Neg ground (as most all alternators require) you would have to reverse ammeter leads or it reads bass ackwards.

Wire the coil to match your ground i.e. if at Pos ground its lil + wires to distributor while if Neg ground its - wires to distributor with the other terminal, of course, getting voltage from the ignition switch/ballast.

You can use a 12 volt genny or alternator, starter will work at 12 volts okay.

John T

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Andy Motteberg

06-05-2007 20:30:01

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Re: Converting a Farmall A to 12 volt in reply to history guy, 06-05-2007 20:20:02

You need a 12 volt alternator or generator and regulator or cut out, 12 volt head and tail light bulbs and a resistor if you have a distributor ignition. If you need wiring diagram, go to the link below.

Andy.

Wiring Diagrams

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HAS

06-06-2007 06:30:10

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Re: Converting a Farmall A to 12 volt in reply to Andy Motteberg, 06-05-2007 20:30:01

For the lights, you can also wire two 6 volt lights in series and run them on 12 volts. The only drawback there is if one burns out, they're both out.

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