In Reply to: Re: HELP.....8N generator gurus? posted by JMOR on August 30, 2021 at 11:05:30:
I also need a guru's help, and have learned much I never knew from your "JMOR's Wiring Diagrams." I am attempting to replace an original, methinks, 9N10000C generator (single terminal, 3-brush, tensioning band/spring kit) with what I understand should replace it on my still 6v 1941 9N (SN 54407): a 2-brush shunt-type, 3 terminal generator, the 8N10000B (or its equivalent). I ordered and received a new 8N10000 generator (from Yesterday's Tractors/All States Ag Parts) and was puzzled that it has only one terminal and also has the adjustment screw for an apparent 3rd brush -- looking very much like my defunct 9N10000C. A YT helpdesk said it was the correct replacement (including being OK for my front-mount type distributor), but said they would ask in-house and call back why it has an apparent 3rd brush and only a single terminal. I have not yet heard back from the YT people, but I would like to install a generator ASAP if possible (before coming snow). I'm wondering if this 8N10000 is somehow actually a suitable replacement for the 9N10000C (still using a new 9N10505A cutout, rather than an upgrade voltage regulator 8N10505C)? Or is the 3rd brush adjustment screw a known residual/vestigial false-front, and that the unlabeled threaded-holes in the casing (not the two used to mount back on the generator with the tensioning-band) are really the Field and Ground terminals used with the single Armature terminal on the end to connect to a new 3 terminal voltage regulator (8N10505C) I was told by YT was appropriate for a 2-brush 8N10000? I would disassemble the generator and check the internal connections, but if it would probably void any return if it's a mislabled/mispacked 3-brush device. Any advice you could provide would be greatly apppreciated. Best regards, Lou.