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Ford 9N, 2N & 8N Discussion Forum
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9N ford

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Author  [Modern View]

08-04-2020 16:18:21

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Hello Folks, Please bear with me. My brother in law has a 9n ford.
He has put a new after market generator 6 volt, three brush, one wire. It has a new cutout as well. So he installs the generator. Starts and drives the tractor around. The generator is not putting out any juice.

I checked the generator with a meter and it is only showing 1.5 - 2 volts. I didn't
want to flash the cutout until after I got some advice from you folks. I did check the generator and it will "motor".

If I flash the cutoff with things as they are, will I damage anything? Or has he all ready damaged the generator?

Thanks for any and all input.


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08-05-2020 12:00:32

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 Re: 9N ford in reply to trimmer, 08-04-2020 16:18:21  
As the Ploughman said,the generators can be rebuilt over and over. A "Mom and Pop"starter and generator shop can get your 65-80 year old stuff to work much better that foreign made junk.I had my generator and starter rebuilt almost 20 years ago for $35 each,but he just cleaned the starter and didn't charge me. Honest shops may be hard to find,but when you do,it's worth using them. I got my alternator rebuilt on my 88 Toyota truck about 15 years ago for $35.00 and it works great.

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Tim PloughNman Daley

08-05-2020 03:15:06

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 Re: 9N ford in reply to trimmer, 08-04-2020 16:18:21  
What did you do with the OEM generator? If you still have, I may buy it. Does it have the belt tensioner? All FORD major components were designed to be rebuilt over and over including generator, starter motor, distributor, carb, water pump, and more. Most all stuff made today comes from Cheena and most are just cloned from clones. None are licensed by FORD and nine made like or as good as the originals. Ford Tractors are no exception. Don't assume you have a 3rd Brush. Is there a n HI/LO adjustment screw on the back plate? You would have to inspect it internally to determine if a 3rd Brush even exists, and if so, ignore it, turn it all the way down. Next, the best investment you and your b-i-l can make for you 9N is to get copies of all the ESSENTIAL MANUALS. So, what does the AMMETER show when running? It should have about 5-10 AMPS at idle. Your gen outputs AMPS. Again, does it have a belt tensioner device? If fan belt isn't tight, unit cannot charge the battery. Next is to verify battery is good. Don't assume if you simply charge it to be good. Specific gravity must be met. Have bat tested at a shop under load. Invest in a Battery Tender (Float Charger) for when it is idle. With battery disconnected, verify entire wiring setup is correct via diagrams and your VOM set to CONTINUITY. Do not use a test light -it requires power and you don't want that while testing. Don't use OEM color codes - new wiring harnesses don't ensure colors are OEM unless they are one of the few places that make them all exact-as-original. I suggest you inspect all wiring first (did I mention belt tension?) then once approved, connect battery and perform continuity via cutout. Polarizing the 9N/2N generator with cutout is to arc spark the cutout BAT terminal to the ARM terminal. If problems still persist, you can perform the spark test and begin inspecting the distributor. One step at a time.





Tim Daley(MI)

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Mad Farmer

08-04-2020 19:07:36

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 Re: 9N ford in reply to trimmer, 08-04-2020 16:18:21  
After you polarize the genny, try adjusting the 3rd brush, that regulates output there is no voltage regulator

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Bruce (VA)

08-04-2020 18:37:39

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 Re: 9N ford in reply to trimmer, 08-04-2020 16:18:21  
By " flash", I assume you men polarize the generator?

Go ahead and do it; see tip # 23

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