Posted by modifyman on October 22, 2023 at 09:42:37 from (69.71.12.177):
I am pretty good at trouble shooting stuff...regardless what it may be.
This analytical thinking is of course a double edged sword.
But later in years now, I have a brain overloaded with data...what I remember, at least...
So it bothers me when I can't figure out why I can't get "this" tractor to charge.
This being, a later model John Deere. (I think 62...that's when I showed up)
1010 R...gasoline...pretty sure we are the second owner. First one was mowing his lawn one day and the post man found him later sitting there keeled over...What a way to end this chapter in ones life.
Saw it for sale in his brothers front yard and we needed a bigger tractor.
A Kubota L1500 only can do so much.
And yes, it being as old as I am, constant maintenance and repairs is expected.
I like the older stuff because it was built so it could be repaired...not thrown away.
So, this charging episode, or lack of, has me boggled.
I have gone through the generator. Cleaning it, (badly needed) removed as much rust as possible. Redid and checked connections for continuity...where there should be and not be...have plenty of brush life left...in fact, I think they were not used much after last replacement...reassembled and I just don't get a substantial voltage reading.
I have polarized it.
Went through the regulator and the smaller relay/solenoid points were not making contact. Cleaned both sets....still nothing.
I suppose there could be an internal short on/in one of the fields.
Other than that what would cause the thing not to generate a current at high RPMs?
I have tried to find an indepth explanation how the regulator works or how this type of generator functions. No magnets so it uses electromagnets...? and that is where I am unsure as to how the constant commutator switching with brush contacts affecting the field/s...and maybe I should go check for AC? (Just thought of that)
Any one have any thoughts on this?
Being how there are no diodes I am not sure how the DC current is developed. I know I am missing, or have forgotten, (more common lately) something/s.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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