I believe that should be an 82GA Generator. The series field taps should be 0-2-3 on the pole pieces (Total 12 turns).( actually if you look close the numbers are stamped on the taps). If it's a 71GA which I doubt,(used on Geared machines mostly) but possible with a low capacity car, the taps would be 0-3-5 on the pole pieces(total 20 turns). If you have any construction manuals the generator diagrams are in them. I do have the adjusting instructions from an one of the Old Field Manuals. If you still need them PM me and I will dig them out and see how big the files are once scanned. Also I believe they have an Accel and Decel Series Field Switches and bed spring shunts.