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Subject: HELP.....8N generator gurus?

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Mark M    Posted 08-28-2021 at 22:44:35 [URL] [DELETE]        [Reply] [Email]  
  • HELP.....8N generator gurus?
  • I am new to the 8N world, recently picked up a 1947 (ser# 18351) that I am using around the farm. The bearing on my generator (still 6V) went out so I replaced the bearing. While I had it apart, I realized that I'd like to drop a new/rebuilt in. The one that I have currently is a 3 wire,3-Brush, with a threaded pulley. The only one I could get locally is a rebuilt Wilson rated at 35A with a pulley that is keyed not threaded. Wilson also one that has a threaded pulley like mine but it is rated at 68A. I thought that Ford used the three wire/brush threaded pulley generator during the early production of the 8Ns in 1947, then transitioned to the keyed pulley type which generated more amperage. Seems like the Wilson generators would follow suit but the threaded one has almost twice the amperage. Can I use the keyed pulley generator with higher amperage on my tractor? If so, do I need a different voltage regulator. Both units are three wire types, physically identical, but the one has higher amperage rating. I found a 6V generator on Steiner website that is a three wire unit, but they say it is for 9N/2N 1940-1947 part #FDS298.....comes with a pulley so I think it is a threaded pulley? Gotta think that Ford used up their stockage of 9N/2N generators in the early model 8Ns?

    JMOR    Posted 08-30-2021 at 12:06:59 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HELP.....8N generator gurus?
  • WHAT is going on??? Tried to respond 3 times on two different computers and response never shows. this not likely either.

    deanostoybox    Posted 08-30-2021 at 15:10:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HELP.....8N generator gurus?
  • There is a "security server" caching dynamic pages. If you delete the cookie from ntractorclub you will see the latest version.
    SUX :-(

    JMOR    Posted 08-30-2021 at 17:08:04 [URL] [DELETE]        [Reply] [No Email]  
  • delete cookies?
  • If you delete the cookie from ntractorclub you will see the latest version

    how do I do that?

    deanostoybox    Posted 08-30-2021 at 18:44:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: delete cookies?
  • Sorry that must have been a fluke. It worked after3I had made a post, once. Just visiting the site does not set a cookie. The problem is the security service is also a CDN which is unnecessary for this site as it only serves a couple of images, but it is serving the cached versions of the dynamic pages. If you wait long enough before you revisit the site you will get the most recent version of the page. I have not figured out how long that wait is, but the dynamic pages should never be cached, and the server should be sending headers to tell the browser not to cache the pages. The header:
    x-sucuri-cache: HIT
    is the giveaway.

    Steve Dabrowski    Posted 08-29-2021 at 13:52:20 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HELP.....8N generator gurus?
  • Unless your's is a basket case I would rebuild it. Take it to a machine shop and turn the armature, get new brushes, a new bushing for the rear and put it back together and it should be fine. It is not hard to do and parts are available from DC or Just 8N's

    Mark M    Posted 08-29-2021 at 17:07:29 [URL] [DELETE]        [Reply] [Email]  
  • Re: HELP.....8N generator gurus?
  • Excuse my ignorance, but what does turning the armature do for you? Thanks

    deanostoybox    Posted 08-30-2021 at 12:00:34 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HELP.....8N generator gurus?
  • Turning the armature refers to cutting a clean smoth surface on the commutator for the brushes to ride on.

    JMOR    Posted 08-30-2021 at 11:09:58 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HELP.....8N generator gurus?
  • Well, Mark, if all components are good (arm, fields, brushes, etc.) then turning it fast enough will generate a voltage. :)

    JMOR    Posted 08-30-2021 at 11:05:30 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HELP.....8N generator gurus?
  • Well, if you turn it fast enough , in correct direction, and fields. brushes, arm, etc. are all in good shape, it will result in generating a voltage, Mark. :)

    Carl    Posted 08-29-2021 at 07:02:06 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HELP.....8N generator gurus?
  • Go out and get yourself the required reading --- i.e manuals as a newbie. The armature, bearing ID, and pulley nut are all metric. The early, '39-'49 ones used the .59-20 thread and the later ones with 2-Brush & 20 amps used .669-20 thread. 15mm = .559 and 17mm = .669. 20 is the inch pitch size. The keyed shafts and pulleys were metric as well. Don't ask why. Go to Dennis Carpenter or Just8Ns for parts. Brush set is p/n 40-10069 and Bearing is p/n 9N-10094. You don't need a 35 or 60 amp generator. You have some incorrect information. Bearings and brushes are the same from '39 thru '49. When Ford changed to the 20/2-Brush generator, it now had the 17mm armature and pulley. All 8N's and Voltage Regulators had 3-Wires. Brushes and wires are not involved with each other so don't get confused. The generator and the voltage regulator have connections for ARM FLD and GRN regardless how many brushes they had. DC sella both the early and the late 8N voltage regulators. If you have the original Auto-Lite one, keep it but it as it may still work fine. I suggest you to rebuild your original generator. If you want a bit more starting power, go to a 12 volt system.

    Steve Dabrowski    Posted 08-29-2021 at 13:47:40 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HELP.....8N generator gurus?
  • Just a small clarification, the 1939-40 generators were the small A or B series and these had smaller brushes that are different from the larger 1941 -on generators. The rear bushings were also smaller as I recall. I believe the A series originated from the German Ford factory before the war (WWII in case you a young person).

    John in Mich    Posted 08-29-2021 at 18:21:34 [URL] [DELETE]        [Reply] [No Email]  
  • Re: HELP.....8N generator gurus?
  • A young teacher read WWII as World War Eleven. Pathetic

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