IF it's all standard 6volt wiring, the tractor shouldn't be charging the battery backwards. If the battery is disconnected, the generator will lose its polarity and won't charge the batttery until it is repolarized after the battery is hooked back up, and will only polarize in the correct poplarity. To polarize, you need just a jumper or a short piece of insulated wire (so you don't accidentally ground something out!) with the ends stripped back just enough to give you contact. Withthe battery connected and the tractor off, all it takes is a momentary touch between the BAT and GEN terminals on your relay or regulator, which should give you a small harmless spark. That's all there is to it, and the generator, if everything is working, it will charge the battery with the correct polarity. This needs to be done after any time the genrator, the battery or the relay/regulator has been disconnected.
If the battery is flat and you're asking about whether your buddy should hook up a charger backwards because of the positive ground, the answer is NO!!! just as Glennster said. + to + and - to - between the charger and the battery.
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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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