"When I spoke with the people in parts, I was told when the conversion was done (if it was done properly), the starter should have been rewound for a 12 volt system, and the ground polarity reversed, from a negative ground to a positive ground."
The parts people are wrong. If your 340 came with 6 volts (IH was changing to 12 volts in 1958), it was positive ground. A 6 volt starter works fine with 12 volts, no rewiring is necessary. I assume you have an alternator, if so it HAS to be negative ground. If it has a 12 volt generator, most are negative ground, but it will work with positive ground also-the generator must be polarized no matter what the ground is. You do not polarize an alternator. If your ammeter shows discharge with the engine running AND charge with the lights or ignition on and the engine off, reverse the wires on the ammeter.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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