Posted by electro on November 29, 2021 at 13:35:46 from (206.74.76.168):
In Reply to: JD 420 S 6v to 12v posted by crsutton81 on November 28, 2021 at 17:04:37:
The plan you described will work just fine. The ammeter will not work but you stated you are not concerned about the ammeter. There will not be any parasitic drain from the regulator so you can leave it in place. The regulator on a 420 can be hard to get to.
If you want the ammeter to work then hook the alternator to the meter or better yet just use a voltmeter. If you do use the ammeter, the connections on the meter need to be reversed since the original tractor was positive ground, at least my 420 crawler was positive ground. The 420 will turn fast enough to excite a one wire alternator but will need close to full throttle for that to happen.
The parasitic drain from a one or 3 wire alternator is small. The few milliampers or less is not going to have any real effect on battery life.
Like always, James Howell posted good photos but his photos are for a 3 wire alternator. Your one wire will be slightly different. I prefer a 3 wire but either will work.
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