I have a 1975 Farmall 140 tractor and it has the original 12v generator with voltage regulator setup. I have installed a new voltage regulator and had the generator rebuilt. The system charges well, but for some reason it stopped self-exciting and charging on its own. If I take a jumper wire and jump the BAT and GEN terminals on the regulator, it will charge with no problem until I stop the engine on the tractor.
What is my problem and how can I fix it so I do not have to jump those terminals each time I crank the tractor?
What is my problem and how can I fix it so I do not have to jump those terminals each time I crank the tractor?