POINTS BURNING FAST 640

Second, there are a lot of wiring diagrams/instructions out there, hope this link works. (go here, do that, or at least check out your wiring against this).

And I hope I am not steering you wrong by thinking the 8n wiring is "close enough". There was another link here at ytmag that I can't remember the where-of that was NAA/600/800/etc., but this guy is using the same alternator anyway.
Good luck.

• 8n 12-volt conversion instructions and diagrams.

The fact that your tractor continues to run-on after the ign switch is open (off), says that you have miswired the alternator. I would guess that you have a rather "high" system voltage which is causing excessive current to flow in the points to coil primary circuit.

There have been several discussions, on this forum, regarding the proper way to hook-up a alternator. Try searching for this information. If you can't find it, I should be able to find a previous post where I explain how to connect a 10SI Delco alt to the system.

Good luck.

- Drew

Also, if we are talking about a Delco 10SI series alternator (actually any alternator with an internal regulator that I am aware of), the "steering" diode will not stop any discharge of the battery -- that's an inherent funciton of the alternator design.

A standard silicon diode differs from a check valve, in that it passes current in both directions, they "leak" in the reverse direction. It is best to think of diodes as "steering" devices for current.

It is conceivable that if the dwell time is excessive and the coil is defective (low primary resistance) that this condition could be causing the points to melt.