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Ford 9N, 2N & 8N Discussion Forum
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Alternator ?

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ryanNva

08-31-2005 06:00:17




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Okay, i checked the voltage coming out of the alt. and found it to be less than 1 volt. Obviously this won't suffice since i need it to run a 12v system. My Question, what aftermarket alt's. will work on the 53 NAA. I am looking to replace the one that is on there with something i can get from local auto parts store or junk yard.




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Tymoc

08-31-2005 06:10:24




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 Re: Alternator ? in reply to ryanNva, 08-31-2005 06:00:17  
Most guys I know buy S10 pick up alts. from the junk yard. Get them for $10.-$15. Seem to work ok for them.



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gahorN

08-31-2005 09:26:08




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 Re: Alternator ? in reply to Tymoc, 08-31-2005 06:10:24  
I don't know that the small Chevy pickup truck known as the "S-10" alternator is the same as the Delco "S10" alternator found on many larger GM vehicles and commonly used for tractor alternator conversions.



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ryanNva

08-31-2005 06:18:31




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 Re: Alternator ? in reply to Tymoc, 08-31-2005 06:10:24  
is there any change of mounting needed for this type of alternator. I think i still have the generator on mine.



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souNdguy

08-31-2005 06:54:54




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 Re: Alternator ? in reply to ryanNva, 08-31-2005 06:18:31  
Your message previously stated that you checked your alternator and it had 1 volt 'coming out of it'... Now you state you have a generator???

Which is it..

If you have a generator.. you may simply need to re-polarize it. The NAA used a B circuit genny and regulator.. polarize ( and full field ) by jumpering bat to field momentarilly. This will polarize it if the engine is not running. if the engine is running it will also full field it and produce max charge.

Try to polarize it and then start up.. if the ammeter comes to life.. you are good to go. if still no charge.. full field the genny... bat to field. if still no charge.. leave it full fielded, and then jumper from arm to battery to bypass the vr fully... that is.. you have the field and cutout bypassed. at this point you should have max charge if the genny is working.

If not.. I'd take both to a genny repair shop and have them fix it.. way easier to fix a genny/get a new vr than to go to the hassle to convert to 12v.. You would need a new coil, an alternator.. belts.. brackets.. etc.

Soundguy

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ryanNva

08-31-2005 07:02:41




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 Re: Alternator ? in reply to souNdguy, 08-31-2005 06:54:54  
Its wierd, i'm gonna have to take pictures of this set up. I have what looks like this on there - Link - but i am using a 12v battery and a 12v starter solenoid. There is a little white rectangular voltage resistor board to drop it to 6v to the coil but i am lost as to what the charging system is, it doesn't look like an alternator, but why would someone put a 12v battery and the work to make it run on 12v and not change out the generator for an alternator? I will take pictures so everyone has a clear understanding of what i got going in there.

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Dell (WA)

08-31-2005 07:48:51




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 Re: Alternator ? in reply to ryanNva, 08-31-2005 07:02:41  
Ryan..... ...welp, that is definately a picture of a NAA genny and yours may or may not be a 12v genny thats been converted by a shop by changeing field windings. Its called a "stealth" conversion.

My betting is it ain't been converted but I've been wrong before. Theres many a tractor that the PO (Previous Owner) just used a 12v battery and every nite connected a 12v charger to it and didn't even worry about changeing the electrical gennerator system to 12v. Your tractor can run for hours on a 12v battery; most 12v battery hold about 900amp/hrs and yer ignition only takes about 3amp/hrs.

Most 12v conversions use the common Delco 10SI aluminum framed alternator with built-in alternator. (donnno what an alternator looks like? check yer 12v belchfire V-8 or rice-rockett 4-cyl)

Use the 3-wire version with idiot light 'cuz it charges at low rpms of tractor engine. The deceptively desireable 1-wire version needs about 1800rpms before it starts charging. I don't like jazzin' a cold engine to 1800rpms, do you? And YES, you will haffta change to a NEW alternator mount iff'n you convert.

Keep tellin' ya, I flunked mindreading and you've gotta do a better job describing yer abomination of electrical miss-mash..... ....Dell

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Mike S

08-31-2005 07:43:37




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 Re: Alternator ? in reply to ryanNva, 08-31-2005 07:02:41  
It is possible that the previous owner could not tell the difference between a 6volt and a 12 volt system? Or they put a 12 volt generator on the tractor, either from a Ford truck or a Ford diesel tractor? In either case, you can use a 12 volt coil. You do have a bit of a puzzle.



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souNdguy

08-31-2005 07:29:09




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 Re: Alternator ? in reply to ryanNva, 08-31-2005 07:02:41  
The pic you show is a generator.

here's the deal. it is possible that the generator was rebuilt as a 12v genny.. lots of people do that as 'stealth' conversions. If that was done.. you may need to take it to a shop to check what vr was used.. and what circuit type it was wired as.

Now.. Some people simply drop in a 12v battery and don't convert the charging system... that may be your case.. a 6v genny.. and 12v battery... etc.

If that is the case.. I'd see if the genny will still charge 6v.. and if so.. check to see if 6v will turn the starter etc.

No reason to use a 12v solenoid, as a 6v solenoid works on 12v fine.

You probably need to have your genny checked at a shop to see what it is at this point.

Soundguy

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ryanNva

08-31-2005 07:03:34




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 Re: Alternator ? in reply to ryanNva, 08-31-2005 07:02:41  
sorry bout the link, try this one.



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