Could be either, it has the shell of a later Delco 12v but who could tell even with numbers it could have been rebuilt either way. One brush inside is grounded direct to the end frame. One brush is hooked to the Arm post. Internally that same brush is attached to the field windings. The F terminal is attached to the other end of the field windings. If you insulate the Grounded brush with a piece of plastic (from touching the commutaor bars, there should be infinity between all the terminals and ground. With the brush touching, there should be nearly Zero ohms between the Arm terminal and ground, and maybe 2 to 4 ohms between the F terminal and ground. The attached content should solve the issue! Jim
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Today's Featured Article - Uncle Cecil's Super A Lives Again - by Mike Purcell. A week or so out of most of my childhood summers was often spent with my Uncle Cecil and Aunt Sissie in the small East Texas town of Maydelle on their 80 acre farm. Some of my fondest memories of these visits are those of learning to drive a tractor at the helm of Uncle Cecil’s 1948 Farmall Super A. Uncle Cecil was the second owner of this wonderful little tractor, but it was almost as though he had adopted an infant. The original owner was a man from Minnesota who bought her from a local dea
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