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Another bit of info...from a different Ken Before you replace any parts, take a look at the articles on this web site and read about how the 3-brush generators work - excellent information. After this, check a couple of things - the obvious is the brushes, there is a strap around a gasket at the brush end of the generator, taking this off allows you to look
inside. You can check/replace the brushes here also with care clean the commutator, I used 0000 steel wool with great care not to leave any inside. An air nozzle on a compressed air source works well to clean it out also (I found out
my Pony did service on a tobacco farm here, had about a quarter pound of tobacco inside). But check this first, it may be a very easy fix... On the light/generator switch there is an assembly lug that is soldered to one of the contacts - if this comes loose the generator will not charge anything. There is no true regulator, the box on the side of the generator is a cutout relay for switching off the generator at low engine speed (low generator output).
The regulation is done by grounding of the 3rd brush circuit either through a resistor
for low charge (3A) or directly for high charge (about 10A). This grounding can be interrupted either by this lug coming loose/unsoldered from the
contact, or by corrosion around the hole the switch is inserted through the instrument panel. You may be back in service by simply fixing the grounding in the switch. Hope this helps -- Ken
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