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Subject: UN converting 12 volt

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Zeke Central Oregon    Posted 04-19-2022 at 11:43:30 [URL] [DELETE]        [Reply] [Email]  
  • UN converting 12 volt
  • I just bought my first 8n. It has been converted to 12 volt, but given the other “improvement s” the po did I am not confident that it was done right. Say this: it starts and runs. Would you put the 6 vt stuff back? What problems am I going to see?

    I hate the shiny alternator poking out behind the radiator 🤨

    Zeke

    Jack - Iowa    Posted 04-20-2022 at 07:19:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: UN converting 12 volt
  • I also am a original 6 volt diehard. However I have a 860 which a previous owner converted to 12 volts. Both work fine and I have changed neither.

    In my opinion the only advantage to going to 12 volts would be if you want to power some accessory, such as a pump. I mounted a water spray outfit on the 3 point for protection when burning CRP ground.

    However, if you are not experiencing any problems I would leave it alone and put my money elsewhere.

    Jim    Posted 04-20-2022 at 05:05:06 [URL] [DELETE]        [Reply] [No Email]  
  • Re: UN converting 12 volt
  • The Ford original electrical system was 6-volt/positive ground and works fine. Many have been switched over to the 12-volt/negative ground system and works fine as well. There are PROS & CONS to each system and either one will work fine PROVIDING they are wired correctly. That is the problem with a lot of folks. They don't know how a 6-volt system is supposed to be wired and then have non-starting issues. Ditto with a 12-volt system too. 99.98% of all non-starting issues are due to incorrect wiring setups regardless if 6V or 12V. You can get a wealth of information in the How-To's forum here, under electrical to start with. Scroll to Wiring Pictograms by JMOR and download a copy as he has shown how to wire these BN's correctly in both 6V and 12V. You also need to search for Bruce(VA)'s documents and posts. 75 Tips is a starting point. All 9N and 2N models after 1940 were wired the same: 1-Wire/3-Brush 11A generator, a roundcan cutout circuit, and a 1-Wire Starter Motor with no solenoid. The 8N model went to a 3-Wire/3-Brush, 11A generator (at first) that used a voltage regulator. The Starter Motor was a 3-Wire model that now used a solenoid. All 9n, 2N, and early 8N's (til 1950) used the front mount distributor. This has been a confusing part for a lot of folks and if not done right will cause problems. Guys screw it up and can't start so figure they have to go to 12 volts then end up with the same problems. The 8N after 1950 went to a 2-Brush/20A generator and a side mount distributor that were big improvements. Unless you have an early 9N or early 8N that you want to restore to all original, and your tractor now has a 12 volt setup, I suggest to leave it as is and verify it is wired correctly. Start with the correct battery. Verify wiring by the diagrams without the battery connected. One mistake folks make using both a generator and an alternator is they fail to have a fan belt tensioning device attached. Without proper fan belt tension, your system will never charge the battery. When all is right with world, invest in a Battery Tender to keep it at 100% at times when not running. Tons of info here in the archives and How to's.

    John in Mich    Posted 04-19-2022 at 19:48:37 [URL] [DELETE]        [Reply] [No Email]  
  • Re: UN converting 12 volt
  • These tractors were built with 6 volt systems or, in the case of the 2N, a hand crank and a magneto. If a hand crank can be turned to start a strong engine properly set up, 6 volts is a back saver.
    As someone else said, your tractor, your choice and for any reason you want it. Just do it right.
    Myself, I am a 6 volt diehard. Of all of the Fords that I have owned, I bought only one that was 12 volt. My remaining "umteen" (I never state a number) are 6 volt.

    Del Huebner    Posted 04-19-2022 at 18:23:30 [URL] [DELETE]        [Reply] [No Email]  
  • Re: UN converting 12 volt
  • I am in the process of bringing back a very late 9N. Serial #98991 and the first thing I did to it was remove the 12 volt alternator and conversion. I have 2 alternators on the shelf now and have no problems with a 6 volt system if properly maintained. Everyone has their preferences an I respect that.

    TheOldHokie    Posted 04-19-2022 at 12:33:49 [URL] [DELETE]        [Reply] [No Email]  
  • Re: UN converting 12 volt
  • If it works I would leave it. There are plenty of advantages to 12v. I also did not like the alternator look so I had the generator converted to 12V. Downside is you still have that puny output. You can buy alternators in a generator can but now we are talkinf serious bucks.

    TOH

    Zeke C.Oregon    Posted 04-19-2022 at 13:48:40 [URL] [DELETE]        [Reply] [Email]  
  • Re: UN converting 12 volt
  • Thanks, I was afraid of that. Big bucks are not 8n my future

    Z.

    JMOR    Posted 04-19-2022 at 14:20:25 [URL] [DELETE]        [Reply] [No Email]  
  • Re: UN converting 12 volt
  • Rattle can of flat black or Ford red?

    Zeke-C.O.    Posted 04-22-2022 at 13:24:54 [URL] [DELETE]        [Reply] [No Email]  
  • Re: UN converting 12 volt
  • Great idea😃

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