Well, not the case at all. Polarizing is a function of having full current pas through the field windings such that the field pole cores (steel pieces in the center of the windings) become magnetized. This process (on a "A" type generator like the ones in Farmalls) just passes battery current through the Armature post by bypassing the regulator. The field is attached inside the Gen to the armature post on one end, and the F terminal on the other. The F terminal is grounded through the regulator, thus when Battery voltage is applied to the armature terminal on the VR, the voltage also goes through the field windings polarizing the field poles. The voltage regulator is not polarized ever. The voltage regulator is just the most convienient place to jump the battery voltage to the Armature post, by jumping from BAT to ARM at the regulator.
Many regulators do not care which polarity they are working on. they just do the job of regulating the amount of grounding that takes place while generating voltage to charge. Some more recient Voltage regulators have internal parts that are polarity specific, and will not work, and will be dammaged by being used on the wrong polarity system, or a battery put in backwards. Thus it is advisable to choose the polarity you want to run, select either a VR that does not care, or a VR that matches that polarity. Then with the tractor off, polarize the generator as above. Do not polarize a Ford style "B" circuit generator this way!! JimN
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