Calling all charging system gurus!!!!

[save_old_iron]

and don't linger too long on making VOLTAGE measurements on the field terminal - try to limit your thinking about fields to grounded = generator on, not grounded = generator off. If you could vary the VOLTAGE on the field coils you could vary the power produced at the output of the SG and wouldn't need the regulator clattering away with relays to do it. I do believe there are electronic circuits available which you can place into a gutted regulator case and create an electronic voltage regulator.

In regards to some of your earlier posts, the field coils do not generate power, they ENERGIZE the field shoes to become magnets - magnets of a DC motor (the SG). There are no permanent magnets in the SG so the field current needs to be present to create ELECTROMAGNETS out of the field shoes. When field current flows and the field shoes become magnets, the windings in the rotating armature are swept thru the magnetic fields and current is induced in the armature windings - which then heads out the "A" terminal to charge the battery.

I smell pancakes on the griddle - I'm outta here ............

[C5rider]

Thanks for the clarification. As is the case most of the time, I know enough to be dangerous, or get the job done. Problem is, knowing which is which before the mushroom cloud appears!

To clarify further, the shoes are actually the metal plates that the wire wraps around on the coils, correct?

BTW: went out and checked, still charging like it should!

[R Bedell]

So I understand this correctly, you are working on the Original Model....and not the 129...???

[ol'George]

Originally Posted by C5rider

Thanks for the clarification. As is the case most of the time, I know enough to be dangerous, or get the job done. Problem is, knowing which is which before the mushroom cloud appears!

To clarify further, the shoes are actually the metal plates that the wire wraps around on the coils, correct?

BTW: went out and checked, still charging like it should!

Yes they are sometimes called pole shoes.
And back when we went to Alternators in the early 60's on vehicles, they had a Regulator that looked like a voltage regular "box" but with a shorter cover, it was Electronic inside,no points to burn/vibrate.
Motorcraft (Ford) made them to replace the earlier V/R equipped vehicles that had Generators, Think I still have one around here someplace.
They were in a "kit" with a short adaptor harness.
Kind of an "upgrade" and it worked well.
Always wanted to figger out how to adapt that principal to these old S/G systems,
but I gave up,and on the bigger tractors, I just put a $5.00 junk yard alternator on them. quick,simple and trouble free.

[jbrewer]

Roland helped me with the same issue with my tractor..... Filing the burrs off the relay contacts fixed it.

[C5rider]

So I understand this correctly, you are working on the Original Model....and not the 129...???

That is correct. Probably have me mistaken for someone else. I've only got two "O"s and a 1715 (mower).

Wouldn't MIND a 129, and a 1250, and a Lo-Boy...

You get the idea.

I'm gathering that there is a LOT of information that can be gleaned on this subject. The current "use and discard" mentality of today has really limited the knowledge base of many items today.

Would be good for folk to know HOW to rebuild/repair many items, even if they choose not to.