"My friend just called me and said according to what he read that when you polarize the regulator"
YOUR FRIEND IS WRONG AS RAIN While a Generator indeed needs to be correctly Polarized, a Voltage Regulator DOES NOT.
NOTE If a Generator was polarized at the shop or factory at (say Neg Ground) a polarity opposite from your tractor (Positive Ground) and you failed to correctly polarize it before start up YOU CAN DAMAGE THE VOLTAGE REGULATOR
TRY TO CORRECTLY POLARIZE THE GENERATOR BEFORE YOU START IT AGAIN
"With the tractor running and the wires disconected from the generator, I should be able to get a reading from the A terminal correct"?
YES A Generators output is between its ARM post and its case ground. The open circuit unloaded voltage would depend on the RPM and how much residual magnetism is in the field poles
"Do I even need a voltage regulator with the 3 brush generator?"
YES The Voltage Regulator allows for the correct charge plus prevents overcharging.
I would Polarize the Generator then try again and hopefully the VR wasn't damaged if the Gennys was polarized for Neg ground while the tractor is Pos ground !!!!!!!!!
Jim was kind enough to already post a link to my Troubleshooting Procedure down below (also posted here) so Polarize the generator and run through its tests will help determine the cause of non charging PROVIDED ALL IS WIRED CORRECT???
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