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JD A battery

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sarahandmike

New User
I have a model A that has been convertered to 12v but running on two 6v batteries, but they have gone bad, can I replace the two 6v?s with one 12v?
 
Did that to an A over 40 years ago. It came from the factory in 1949 as a 12 volt with 2 6 volt batteries.
Richard
 
If your tractor has a generator, then be sure to [i:654c4848f0]polarize[/i:654c4848f0] the generator after installing the new battery.

Polarize by using a jumper wire and momentarily jumping from BAT on voltage regulator over to GEN/ARM on the generator to get a small spark.
a254030.jpg" width="650"


Hope this helps.
 
Any John Deere a with 2 batteries came from factory as a 12 volt tractor. The 6 volt tractors only had a single battery under the hood and no place to put a second battery. So your tractor was not converted to 12 but made that way.
 
My choice of a 12 volt battery is a series 65 battery. Why? My car uses a 65 battery, my truck uses a 65 battery and my tractor uses a 65 battery. I make a plywood box to fit the 65 battery and line it with carpet to reduce vibration. Has worked for many years.
 
So, a 12v American-made gas tractor in 1952 or earlier? That surprises me somehow, US made cars were still 6V then.
 
It's true.
That also explains why they used two 6 volt batteries in series, rather than one 12 volt. !2 volt batteries simply were not that common back then.
 

I'm not so sure that they were 12 volt. Might have still been 6 volt, even though there was 2 batteries. Were the 2 batteries connected in series, or parallel? One way will double the amps, the other way will double the volts.
 
They started to use 12 volt in 47 because the 6 volt did not have enough power to crank the big engine in an A on gas compression. And to do that they had to use the 2 batteries to get 12 volt as 12 volt batteries were not yet avaible. But back in I think it was the 20's one make of car had 12 volt and when that battery went bad Uncle ended up junking car because no body at that time knew anything about hooking 2 6 volt together to get 12 volt. I don't remember make Dad told me it was and Dad has been gone since 93. And Uncle several uears before.
 
They were 12 volt on the 47 up pressed frame A, not sure what the G used 6 or 12 volt but I would think also the G's from that time up were also 12 volt. Generator says 12 volt on it.
 
Leroy ..... interesting story. I think the British cars and tractors both had 12V systems way back in the day, not sure exactly when but it was commonplace over there.
 
(quoted from post at 11:17:40 01/19/18) But back in I think it was the 20's one make of car had 12 volt and when that battery went bad Uncle ended up junking car because no body at that time knew anything about hooking 2 6 volt together to get 12 volt. I don't remember make Dad told me it was and Dad has been gone since 93. And Uncle several uears before.
Click to expand...
I don't believe that at all.
Anybody that knew anything about electricity knew how to hook up two batteries in series.
And if the car was made with a 12 volt system, the dealer would have had 12 volt batteries or whatever the car was built with..
 
Not nessarly so. the dealers were like the people on here now don't understand the basics (I includ myself in a lot of that) and for just a couple of cars they would not carry a battery that did not have much potential to sell. Still same as now. If only 1 or 2 sold in county why would anybody try to stalk something that was no longer being built and 15 years old.
 
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