Can I change my 28 JD from 6V to 12V?

[buddy]

Is it possible to change out my 6 volt to a 12 volt system? If it is possible how do about making the change? And does anyone have a 6 volt coil?

[sswaney]

Can I change my 28 JD from 6V to 12V?

Almost anything is possible, My question is why would you want to??


Scott

[dlm32]

Buddy,

It would be pretty difficult as the generator on the electric model has the ignition timer built in. If you adapted a modern 12 volt generator you'd have to figure out how to drive the ignition timer.My racer uses 12volts, but it is total loss, and the striped down generator case just drives the timer. Don't know if your generator could be rewound to deliver 12 volts.

[Chris Haynes]

Your field coils and armature in your original generator can be rewound to produce 12 volts. It won't be cheap and trying to find a good generator man these days is hard.

[harleytoprock]

The 6 volt system set up right works fine. On my 27' JD I'm using a Gene Harper regulator instead of the stock cut relay. It works awesome and the battery is never under or overcharged. With this set up the third brush is elminated and the charging is like any other two brush generator. If you need to replace your ignition coil and don't care about originality you can use a stock knucklhead coil or its replacement. However you'll have to add a condenser to the ignition system as the original JD coil has the condenser built inside. I have the original coil on mine and it still fires fine. I worry that it may fail someday and leave me stranded since it is 80 years old. So I carry in the toolbox a cheap knuckle replacement round coil with wires and aligator clips and a screw driver. In the event of failure, I remove the wires to the original coil and connect them to the new coil via the aligator clips. Its just cheap insurance to get me home and I haven't had to use it. If you need to have an original JD ignition coil , hang on to your wallet! Other than the need to keep 6 volt bulbs on your shelf, I see no reason to switch to a 12 volt sytem.