Posted by Janicholson on May 09, 2019 at 18:26:29 from (24.240.46.228):
In Reply to: What the heck??? posted by Goose on May 09, 2019 at 17:00:33:
That is a cutout relay not a voltage regulator. The blue wire (looking newer) is the field connection, the older blue wire under it is the armature connection, the red wire connected in back is going to the ammeter. (or battery if the ammeter is disconnected). The old cutouts have a wire wound resistor under the bottom that provides a low level of constant charge rate, by providing a ground for the field (which gets its voltage in the inside of the generator, and is grounded to make it operate. If you disconnect the red wire, it should show 6v on the wire, and nothing on the terminal it was connected to. The red wire should be a #10 gauge if it is not. The taped up wire should be removed. This tractor was probably purchased without lights. It is simple and worked OK for the time it was made. If you want to have it regulator controlled, let us know and we can make it work a little more in the modern direction. Jim
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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