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John Deere Tractors Discussion Forum

Charging System on JD A

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02-23-2004 17:21:39

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I need to know what the original charging system on a 1950 or 51 JD A. I bought one and I was noticing that the battery is 12 volt and is positive ground. I thought that only 6 volt were positive ground. Did this tractor come with 12 volt? The generator looks original and it has a delco remy voltage regulator mounted to the bottom of the sheet metal just above the generator. The coil looks original and is 12 volt. (delco remy)also is the distributor. Is all mentioned original. I was just worried about the positive ground on the 12 volt battery.

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John T

02-23-2004 18:02:58

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Re: Charging System on JD A in reply to BB, 02-23-2004 17:21:39

Good Evening BB, Your tractor came from the factory wired as POSITIVE ground and my diagrams show what I also observed some years back that many (later A's) had two 6 volt batteries in series originally. Many got changed over the years for one reason or another to single 12 volt batteries maybe or even negative grounded, but the generator can still charge fine in most cases after re polarization and the coils and ammeter leads may have gotten reversed.

Still, it was originaly 12 volts POSITIVE ground with a to generator mounted Voltage Regulator. If you have any electrical problems or concerns, you can e mail me at [email protected] or call me at 812-824-4608 and I will do my best to answer any questions or problems.

Good Luck with the old girl n God Bless ya BB

John T Nordhoff in Indiana

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Clooney

02-23-2004 17:50:45

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Re: Charging System on JD A in reply to BB, 02-23-2004 17:21:39

BB, all the pre 1960 generator equipped Deere 2-cylinder farm tractors [both 6 & 12 volt] were positive ground..

~It didn't come with a single 12 volt battery but instead came with 2-6 volt batteries wired in series for 12 volts.. A lot of those old tractors have been converted to a single 12 volt battery though.

~If you give me the generator number I can probably tell you what generator you have.. The regulator should be mounted on the generator so something is different there.. Maybe it's just an automotive regulator that can't be properly mounted to the generator [no be deal as far as operation goes].

~I can't tell you if the coil & distributor are original but could be. Does it look like it has an original ignition switch in the dash?

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02-23-2004 19:24:09

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Re: Re: Charging System on JD A in reply to Clooney , 02-23-2004 17:50:45

Clooney it does have the ignition switch in the dash. Thanks to both of you for the help. I have no charge showing on my gage so I will probally need more help in the future getting her back right.

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