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Generator Or Alternator On 58 Cj5

Discussion in 'Early CJ5 and CJ6 Tech' started by Mark T., Aug 27, 2020.

  1. Mark T.

    Mark T. Member 2022 Sponsor

    Been a while but I am back to building the Jeep. My Jeep came without an alternator or a generator. Is there a way for me to tell whether it came with a generator or alternator. I am leaning to installing an alternator (12-volt). I am trying hard to keep the equipment as close to stock as possible for now.
     
  2. Glenn

    Glenn Kinda grumpy old man Staff Member

    They came with a generator originally.
     
    Mark T. likes this.
  3. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Nothing wrong with a generator set-up. Others will differ but I like them.
     
    Mark T. likes this.
  4. Keys5a

    Keys5a Sponsor

    Willys changed to a 12v system beginning in 1957, but alternators didn't come along until around '63/'64. You can install a generator to keep your Jeep completely stock, of upgrade to an alternator.
    -Donny
     
    Mark T. likes this.
  5. Mark T.

    Mark T. Member 2022 Sponsor

    Thanks for the information.
     
  6. Mark T.

    Mark T. Member 2022 Sponsor

    so a 12 V Generator is where I will be spending time and my money.
     
    Glenn likes this.
  7. Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Be sure you get matching (electrical) gen and reg. A reg may over work a low output gen so know what you are buying.
     
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  8. Mark T.

    Mark T. Member 2022 Sponsor

    Man I have so much to learn still. I am super glad this forum is here. Definitely gonna send some money to support this resource.
     
    Glenn likes this.
  9. Mark T.

    Mark T. Member 2022 Sponsor

    I gotta find one now. That seems to be the tricky part it seems.
     
  10. Jrobz23

    Jrobz23 Member

    They are spendy but you can find alternators built into a genset housing.
     
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  11. Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Watch the pulley groove with the water-pump. some wide and some narrow. Need to get matching pulley groove width.
     
    Mark T. likes this.
  12. fyrmn

    fyrmn Member 2023 Sponsor 2022 Sponsor

    Mark
    You might call Genstar electric in Glendale if you have issues or find something that needs repair or advice. He has been there for a very long time and can match your voltage regulator to your generator. He may have something on the shelf. The guy is impressive, knowledgeable about the old stuff and reasonably priced. Good luck.
     
    Mark T. likes this.
  13. Rick Whitson

    Rick Whitson Detroit Area 2024 Sponsor 2022 Sponsor

    I have a generator off a jump starter that was on a wrecker for starting wet motors, it had two generators on it with a Briggs and Stratton motor, they quit using them when computers were put in cars. You can have it for shipping if it will help you out. I put it on my Jeep, but it had to be running fast to work, so I put the right one on my Jeep, then took it off and put a GM one wire on it. You might find someone to re-wire it for your needs? Good Luck.
     
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  14. Jrobz23

    Jrobz23 Member

    If you know how fast it has to spin, you can likely get a pulley that keeps it in the useful RPM range.

    Keep in mind that a large load genset might rob serious power from the engine and might cause belt slip depending on other factors.

    The original units output very little power but it was enough for what the Jeeps needed.
     
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  15. Mark T.

    Mark T. Member 2022 Sponsor

    Oh this is good local knowledge. I had no idea. Thanks for the tip. Just checked by box of parts and not Generator or Alternator but there are the brackets for a generator.
     
  16. Mark T.

    Mark T. Member 2022 Sponsor

    Wow what an amazing offer. Let me know what you need for shipping. There is probably a way on here to do a private message but I'm not sure.
     
  17. Mark T.

    Mark T. Member 2022 Sponsor

    More good info here. I will only have electrical for the original equipment. No radio or other.
     
    Glenn likes this.
  18. Glenn

    Glenn Kinda grumpy old man Staff Member

    To help you understand a bit about generators here are a couple of simple tips. The first alternators they used didn't have much more output than a generator. The biggest difference is a generator doesn't charge at idle and in fact the electrical system can be drawing current to keep the engine running. This won't hurt a good battery and it isn't much current and would take a long time to be detrimental. Idling at a traffic light for example would not be an issue. With your intended usage, as others have stated a generator will be fine.
     
  19. 066wally

    066wally New Member

    I had a generator. I didn't understand how it worked, and it didn't work very well. I went to an alternator that works. I understand what it does, sort of.
    I wasn't trying to stay original, I just wanted something that worked. I didn't have the foresight to save the generator for someone else (pre internet).
     
  20. Jrobz23

    Jrobz23 Member

    Generators are neat in that they don't require power to generate power. They are also needed to run a hylo.

    That being said, they will be more $ to run over time as they are "vintage" and that generally means more $ to fix CORRECTLY.