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Subject: Alt ??

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Rusty 2N    Posted 10-06-2018 at 21:00:02 [URL] [DELETE]        [Reply] [Email]  
  • Alt ??
  • I have a 2N and an 8N both 12v conversions, both charge and do thier thing just fine. 2N starts charging at startup, all good there!
    8N I have to rev it up to excite it. Got to looking and see there is a wire from the main post to a tab on the alt on the 2N. This wire is not on the 8N. Seems to be a plastic cap or cover where the tabs would be.
    What are the odds that when I, if I can, remove that cover there will be tabs under it and if I hook up this wire it will make it charge at startup like the 2N? Rusty

    Rustyal    Posted 10-08-2018 at 07:19:01 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Alt ??
  • You have to have rpms before the alternator will charge.

    Bruce(OR)    Posted 10-07-2018 at 12:24:34 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Alt ??
  • if you desire the cheaper way out, look for the seller, "Triodiode" on ebay and get the low speed GM 10SI alternator VR from him. Replace that part and all should work just fine.

    Ken N Tx    Posted 10-07-2018 at 06:27:01 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Alt ??
  • Make a note to yourself, if/when the Alt on the 8N bites the dust, replace it with the model that's on the 2N..

    Rusty 2N    Posted 10-07-2018 at 11:42:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Alt ??
  • Thank you all!!! Good info! I will just leave it alone then. Plenty of other things to do.

    K.LaRue-VA    Posted 10-06-2018 at 23:11:25 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Alt ??
  • I'd say NO. The terminals may be there. They were on the internal 1-wire regulators I've bought. However, the jumper on some conversion diagrams was to the voltage sense #2 terminal. Voltage sense was intended to adjust alternator output to compensate for voltage drop. That voltage drop compensating feature has little value for a tractor with short wire runs and few accessories, and has nothing to do with exciting the alternator. If the #1 exciter terminal is going to be hooked up, you will need a wire from the switched side of the ignition switch. This is the same wire that is going to the coil. Since this wire goes to the coil, you will have to use a small dash "idiot" light or a diode to prevent the alternator from backfeeding the alternator. When that happens, the ignition key no longer stops the engine.

    The early 1-wire regulators did have a low rpm problem, they had to be revved-up before the alternator would start charging. That problem was eventually fixed. When I bought a regulator to rebuild the alternator for my 2N, I made sure the regulator was the Low RPM version.

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