John Deere D generator

rgjsat · Oct 11, 2016

I recently purchased a 1945 Model D in its working clothes. The previous owner used a 12 volt battery to start the tractor because the generator (and three 7" lights) was disconnected with no belt. He did point out that when the 12v battery was hooked up, the light on the dashed worked so it must have been hooked up to the battery somehow. The generator looked original (faded green paint that matched the tractor) and did not appear in bad shape from the outside. Anyway, I pulled the generator off to have it serviced and a repair shop said that it was a 12 volt generator which surprised me. My question is, did these tractors come with a 12 volt system? If so, were they positive ground as well? Obviously the starter worked with a 12 volt batter but is there something else I should be concerned with the starter?

jdjerry · Oct 11, 2016

One of the D's we had was 12v that I am sure was factory installed. I have used 6v starters with 12v batterys for years. They spin over good. Look up D parts and I am sure you will find a 12v generator listed. Most old cars and tractors were pos ground.

David from Kansas · Oct 11, 2016

Yes, they are 12V system, originally using two 6V batteries. And yes, they are positive ground.

rustred · Oct 11, 2016

they are a 12 volt system.

rgjsat · Oct 12, 2016

Makes sense. Two 6 v batteries hooked up in series is 12 volts.

John Deere D generator

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rgjsat

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