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Antique Farm Tractors with Rubber Tires Vintage farm tractors on rubber tires with various implements. Ford, John Deere, Oliver, McCormick and more.

Antique Farm Tractors with Rubber Tires

John Deere "AR" Wiring?


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Old 11-11-2019, 08:22:57 PM
OldThresherM OldThresherM is offline
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Default John Deere "AR" Wiring?

Hi Folks.I recently purchased a 1952 John Deere Styled "AR" tractor.It is the first electric start "Waterloo" that I have owned.There is a battery box on both sides of the gear shift quadrant.On my tractor,the right one was empty.The left one had a 6 volt battery.The negative lead,from the left battery,was running down to the starter area.The positive lead,from the left battery,was running toward the right side battery box.The only ground strap I saw was in the right side battery box.I hope I explained that right.

I do not yet have an owner's manual for an "AR".And,i have no idea what the previous owner may have done to this tractor.So,my questions are,is it supposed to be positive ground?Are two 6 volt batteries wired parallel to boost amperage?Or are they wired in series to achieve 12 volts?I just want to make sure,so I don't fry anything.

Thanks for the help everyone.
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Old 11-11-2019, 08:35:59 PM
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FWurth FWurth is offline
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Default Re: John Deere "AR" Wiring?

The electric start D, of the same vintage, was a 12volt positive ground system that used 2 6volt batteries in series. I suspect that they may have set up the AR the same. If the original generator is still in place, check the tag on it as the voltage will be posted. Check the starter tag as well. If the generator is long gone, I believe I would just configure it as a 12 volt system. The starter is robust enough to handle 12 volts even if it was a 6 volt.

Last edited by FWurth; 11-11-2019 at 09:10:57 PM.
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Old 11-11-2019, 08:56:45 PM
Allan Severson Allan Severson is offline
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Default Re: John Deere "AR" Wiring?

Positive ground
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Old 11-11-2019, 09:15:50 PM
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Default Re: John Deere "AR" Wiring?

Thank you Allan for correcting it. I was thinking one way and posted the other! Now if he puts on an alternator, Most of them use negative ground polarity. If one hooks it up wrong, there's a dead short.
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