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Subject: Stopped charging

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Robert    Posted 08-20-2021 at 16:13:51 [URL] [DELETE]        [Reply] [No Email]  
  • Stopped charging
  • My 51 8n 6 volt stopped charging, It's been working fine just stopped!!
    I read in the How to's on how to test the regulator I will do that next, Can the generator be tested on the tractor? What's more prone to fail?


    Jack - Iowa    Posted 08-22-2021 at 19:25:35 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • First off I agree with Carl. Polarization is not something you need. I have in my garage a generator from either a 1941 Mercury or a 1946 Ford. I swapped engines in 1953 and do not remember which engine donated the generator. The point is, it has not been mounted since that time. However I have on two occasions tested it by motorizing.
    I am sure if I were to do that tonight it would still work.

    My FO-4 does not contain the instructions on motorizing. However I did find this video which gives a good presentation of it. Apparently foreign as he speaks of the D terminal instead of the Armature terminal.


    The discharging you are seeing is normal if the generator is not working. I would not worry about wiring or the battery at this stage.

    Good Luck,

    Jack - Iowa

    Jack - Iowa    Posted 08-23-2021 at 08:46:32 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • D terminal is British.

    Carl    Posted 08-22-2021 at 05:52:06 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Your F04 manual has a section on how to motor test the generator. Polarizing the generator is not your problem if it was running and now won't. Don't be guessing and before you start taking parts off, do some basic troubleshooting. Define 'just stopped' Does the tractor run? Is the amp gauge working if it does run? Tractor won't start? The first thing to do is test the battery. Even though you say you have a six volt battery that doesn't mean the electrical wiring is correct. Just hooking up a battery charger won't do any good if the battery won't hold a charge under load. You can take your battery to a reliable starer shop in town who knows old Ford systems and have him test it. Get your manuals and picture grams by jmor to guide the correct wiring. If battery is bad get a new one and see if it fixes the problem after you are certain the rest of the wiring is correct.

    Robert    Posted 08-22-2021 at 07:38:51 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Excellent Info!

    The tractor was/is running and starting fine, The amp meter was working showing charging, Now it shows discharging specially when the lights are turned on.

    I've misplaced my FO4 Manual, might you have a or is there one on this site of a brief description on how to test the generator ?

    Thanks much !!!

    Carl    Posted 08-22-2021 at 10:27:55 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • LIGHTS! Well that explains much of what is going on. The lights were never installed on any N at the Ford factory and were only sold at dealerships as options. The dealer could install them but many farmers just bought the set and did their own hookups. A lot of guys connect the lights wrong and end up in situations just like yours. Bad wiring. Most of the time that a tractor won’t start is because the wiring is wrong. The generator motoring test is only found in the newer f04 manual. There is an old version in the Manuals forum here but it doesn’t have the motoring test. You can also kill more birds with one stone by taking all you stuff to a starter shop in town to get tested. Be sure the guy knows old Ford six volt electrical stuff. He can test the battery, generator, amp gauge, and voltage regulator to get tested as well. Before you go ripping parts off, get the Wiring Pictograms here in the how to’s under electrical and use as a template for your wiring diagram. Shortcuts like your switch will most likely cause shorts. Something is shorting out the system and most likely not your voltage regulator, generator, or amp gauge. It's got to be in your wiring. You also need to get manuals for your tractor.

    Robert    Posted 08-23-2021 at 07:50:10 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • This tractor was restored 5 years ago, all wiring is new, all connections are good, lights are wired correctly and I have used the lights hundreds of times, therefor I believe the problem is with the generator or Regulator.

    TheOldHokie    Posted 08-23-2021 at 10:15:10 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • I would suspect the same. Take them to a shop for testing. It is simple and definitive and many shops will do it for free.


    fo4    Posted 08-22-2021 at 10:25:00 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • https://www.ntractorclub.com/manuals/service-troubleshooting/1953%20I&T%20FO-4%20Ford%20Tractor%20Service%20Manual.pdf

    Carl    Posted 08-23-2021 at 09:16:28 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Not a help. the FO-4 manual that is in the manuals here is an older, 1953 version, obsolete, with 60 less pages than the current version and this one here also does not have the generator motoring test. You need a version from 2000 or later.

    HCooke    Posted 08-21-2021 at 18:07:12 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Need more information - how long ago did it charge? Have you tried to polarize the generator?

    Robert    Posted 08-21-2021 at 19:04:41 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Worked fine last week, and have done nothing yet

    JMOR    Posted 08-23-2021 at 13:14:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • If & when you are ready to dig into it yourself, let me know & I will help you isolate to gen or reg. Need some test/clip leads 18-24 inches 2-3 in number.

    Robert    Posted 08-23-2021 at 14:56:33 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Ready !

    JMOR    Posted 08-23-2021 at 16:55:53 [URL] [DELETE]        [Reply] [Email]  
  • Re: Stopped charging
  • Identify which terminal on regulator is BATT, ARM, and Field. Start engine at fast idle or better & connect BATT to ARM with jumper. If ammeter shows charge with jumper but not without, the regulator cut out function is not working. If no increase in ammeter occurs, then with that jumper remaining in place, connect a jumper from FIELD to regulator ground or other good chassis ground and again observe ammeter. Remove jumpers before shutting off engine. Report back & we see where to next.

    JMOR    Posted 08-25-2021 at 10:22:11 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Found anything in last couple of days?

    Robert    Posted 08-25-2021 at 11:13:49 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Sorry, Been sick, Will try it when feeling better.

    JMOR    Posted 08-25-2021 at 12:33:48 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Sorry! Hope well soon!

    Robert    Posted 08-27-2021 at 10:49:27 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Now I'm really confused !!
    After it stopped charging I removed the mower and mowed with my Kubota, Today feelings better I went to start the 8n to pull her in the shop.........Crank,crank,crank-Nothing ,No start, Checked into it a little No spark, cleaned points and bingo ! Started, Now I was about to drive it in the shop when I looked down "Charging" You tell me? checked and checked all wiring and connections all look good.
    I'm at the point now of saying "If it ain"t broke, don't fix it.
    Thoughts ?

    JMOR    Posted 08-27-2021 at 16:38:41 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Stopped charging
  • Well, maybe it was like you & just needed a day or two of rest! :)

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