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Discussion Forum
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Re: 8N Ford tractor 12 volt change over

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Dell (WA)

04-12-2003 09:47:23
198.81.26.173



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Blain.........there are 2 kinds of 6 volt 8N ignition systems, commonally called FRONTMOUNT with a square coil and 4-nipple crab-cap and mandantory "infamous ballast resistor" ...OR... SIDEMOUNT with a roundcan coil and 5-nipple crown-cap. and NO ballast resistor.

These 6 volt ignition coils have different operating voltage requirements. Then there are 12 volt replacement ignition coils which have different operating voltage requirements.

And since you didn't specify what kind of 8N ignition system you have, I ain't gonnna guess because there are 4 different voltage requirments and I flunked mind reading, just ask my ex-wife of 32 yrs..........respectfully, Dell

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Blaine RISH

04-12-2003 11:08:56
67.74.24.240



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 Re: Re: 8N Ford tractor 12 volt change over in reply to Dell (WA), 04-12-2003 09:47:23  
Front mount with 4 nipple crab cap. Is the polarity important? Thank you for your time & knowledge. I'm 80 and need my tractor to do my lifting. Blaine



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Dell (WA)

04-12-2003 11:47:46
198.81.26.173



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 Re: Re: Re: 8N Ford tractor 12 volt change over in reply to Blaine RISH, 04-12-2003 11:08:56  
Blaine...........The commonally used Delco 10-SI 12 volt alternator conversion with built in voltage regulator is mandantory NEGATIVE GROUND. Infact, ALL alternators require negative ground. (its the solid state gutts)

If you are going to use the OEM 6 volt frontmount coil, then you need a 12 to 6 volt converting resistor. Ask your parts person, they know. I don't know because there are several 12 to 6 volt converting resistors made by different parts companys and they all work.

After you get your 6 volt frontmount coil wired for 12 volts using BOTH the "infamous ballast resistor" AND the 12 to 6 volt converting resistor in series like flashlight batterys. You should read about 3.5 volts (2.5 min, 4.0 max) at the OEM 6 volt square frontmount terminal with the points closed and 12 volt battery voltage with the points open. TIP: put tractor in high gear and push/roll the tractor big rear tires to turn engine to close or open the points.

If you haven't started your 12 volt conversion yet, I strongly recommend getting a 12 volt conversion KIT, it has ALL the parts you'll need and FOLLOW the kit instructions religiously...........good luck, Dell

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Jim Cox SW Missouri

04-12-2003 20:31:37
66.119.20.112



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 Re: Re: Re: Re: 8N Ford tractor 12 volt change over in reply to Dell (WA), 04-12-2003 11:47:46  
The resistor is a 8NE10306 that comes with the TISCO kit .5 ohm if you're shopping at NAPA/O'REILLYs. (I would get the brackets from N complete dot com, and skip the kit, there are better alternators out there. )
Jim Cox
SW Missouri



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