In Reply to: Re: 2N charging system (again!) posted by Tim Daley(MI) on October 10, 2017 at 05:50:11:
Tim, many thanks for your thorough response! The reason I got the new gen was so that I could keep the tractor in service without a big down period. I do plan to have the old one rebuilt, but you're right - I was disappointed about the mounting holes in the new one. My measurements are with a ca. late '70s auto multitester (Sears I think), so def not digital, but I don't remember how to use it to test the output current, though there is an alternator mode on it. I guess I should scratch my head harder about remembering/relearning how to do that.
The battery is only a few years old, but I've been "deep cycling" it, i.e. charging it and running the tractor, so I suppose that's a possible weak link. The wiring seems good - I know the wire from the gen to the cutout is a good conductor, and the tractor runs fine (and I have no lights). The only thing I'm not sure about is the ammeter, which has been parked a smidge left of center for several years.
I polarized by crossing a jumper between the two leads of the cutout. I did it both with the ignition off and on, as I wasn't sure.
I didn't know anything about adjustments on the gen itself. It's got a single stud on the back plate (so it's a three brush, right?). So, I guess I'll do the motoring test on it (which should also certainly polarize it), learn how to measure output current, and then make the gen adjustments you suggest.
Tim, you've given me new hope! I appreciate your thoughtful reply!