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8 n 6 to 12 volt conversion question?

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Robert

06-04-2000 21:48:23

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I am replacing the wiring, solenoid, alternator,and all of the necessary things that my newly purchased side mount tractor needs. I have already purchased a 6 to 12 volt conversion wiring kit from genesee but I trying to understand the Negative ground thing. Now, my tractor has been converted from 6 to 12 volts already, but how can I know if it's in the required negative ground. I also bought a 12 coil along with a new alternator (delco equivalent to ac delco s10. My tractor has an ampmeter. My question is, if the old alternator has only one wire from the back (BAT) to the ampmeter,then the wire coming from the ammeter is going to the Bat on the starter solenoid then the negative goes through a resistor then to the coil. Shouldn't the alternator being using at least one wire from 1 or 2 on top? I think that there are so many different ways to convert that I just getting a little confused? Thanks rs

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llamas

06-05-2000 04:25:24

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Re: 8 n 6 to 12 volt conversion question? in reply to Robert , 06-04-2000 21:48:23

How to tell if it's negative ground - if it was working with a previous Delco alternator, it's 99% sure that it was hooked up negative ground. Easy way to check - which battery cable is connected to the chassis?

Concerning the difference between the "old" and "new" alternators, it sounds like it is this - the "old" alternator is a single-terminal "internally-excited" style - actually of later design than the "new" one. This depends on a certain rotational speed to start the generating process going. The 10SI (or equivalent) Delco which you just bought is older technology, a so-called "externally-excited" style - it needs an external feed of 12 volts from the battery to start the generating process. That's what the extra terminals on the side are for. You'll see the exact wiring in the Genesee upgrade instructions, I believe.

In this application, the older "externally-excited" technology is actually preferred. The reason being that these motors turn much slower than the auto engines for which alternators were designed, and there is often a problem getting an "internally-excited" alternator spinning fast enough for the generating process to be commenced. The "externally-excited" style is turned on by the extra battery feed and does not have to be turning so fast to start producing charging output.

HTH

llater,

llamas

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