Re: m farmall electrical system

Posted by Tom Harrower on July 29, 2000 at 10:34:46 from (216.126.190.194):

In Reply to: m farmall electrical system posted by ray king on July 29, 2000 at 08:40:08:

Hi Ray, I could be wrong, but I have read that the one wire delco 10si alternator is used mainly for marine applications, where it would run at a moderately high rpm for a length of time, and has only one wire. In order for it to start charging, it has to be ran at higher rpm than what most tractor applications would comfortably do. The 10 si alternator in the diagram is called a three wire alternator, but for most tractor applications there are only two wires that actually leave the alternator. The exception would be if you had an unusually long distance to run your wiring, then the " third " wire is the one that runs from one of the slide terminals on the alt, to the batt post on the back of the alt. as a jumper. If your wiring was running a long distance, that third wire would connect to a source that was far away from the alternator, such as the ampmeter or a junction block, to assist the alternator in allowing more voltage to be produced to compensate for the voltage drop or resistance in the extra length of the wiring. As said, someone please correct me if I am wrong, I have read much on this conversion and that is how I understood it to be.As for your regulator and other wiring: the 10 si delco alternator has its own voltage regulator built in to it, any other regulator should be removed along with the wiring connected to it. Save it though if it is the original 6 volt as you may want to restore your 6volt system down the road. Wire your tractor as per the diagram. If you have lights, wire them off the ampmeter to a good 12 volt switch, and make sure to use a fuse. That is the down side to doing this 12 volt conversion, you have to remove all the original neat looking factory stuff, but if you do a neat job it will look ,as well as work good. Hope this helps, Tom

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