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9N Generator Tension Spring?

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Old Ag

06-19-2000 10:06:23




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I went to pull my alternator off (not working) and replace with a 6V generator to run the ignition system. How does the generator keep tension against the belt? I read about a "tension spring" in the archives, but I don't have it on my tractor. The I&T manual doesn't show one (that I can see). If I had a picture of how the generator is supposed to mount up, maybe I could find a similar spring that would work. Any suggestions here? My 12-pack of Lone Star Light is half gone, and I don't have the problem solved yet.

Thanks.

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Gerb

06-19-2000 18:47:07




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 Re: 9N Generator Tension Spring? in reply to Old Ag, 06-19-2000 10:06:23  
9N, 2N, 1939 to 1947, Fords have a band that goes around the generator. The band has a bracket with a hole for a bolt about 6 inches long with a coil spring and castle nut. (My 9N does not use the band - the bracket with the hole is bolted the the generator case - probably a mfg variation or may be an 8N design).

The bolt end fits into a small bracket which is held in place by the head bolt on the right front side of the head.
The spring provides tension against the fan belt and will absorb vibrations, etc.
This info is found in an Assembly Manual and Service Parts Catalog for 9N-2N-8N. The catalog is reproduced by someone under a Ford license agreement.
You can find the Service Parts Catalog in use at most Ford-New Holland dealers. They may or may not have one for sale. I think I got mine at a TSC store or equivalent.
Gerb

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Tyler(MD)

06-19-2000 14:54:14




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 Re: 9N Generator Tension Spring? in reply to Old Ag, 06-19-2000 10:06:23  
There's only one bolt to hold the generator on. I torque the hello out of it but it loosens up over time. "From what I've seen", there's homemade tensioners out there.

third party image

Tyman



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Bob (KY)

06-19-2000 13:15:34




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 Re: 9N Generator Tension Spring? in reply to Old Ag, 06-19-2000 10:06:23  
I have a 2N and there is not a "tension spring". There is one bracket at the bottom of the generator that mounts with one bolt near the top of the govenor. The belt tension is adjusted by pulling out at the top of the generator and holding while tightening the bolt. TRICKY.
There may be and probably is some type of tool that can be used to hold the generator in place while tightening. This may be what you seen in the archives. I'm sure the experts will let you know for sure.
Good Luck!!
Bob

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Stoner in pa

06-19-2000 18:44:28




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 Re: Re: 9N Generator Tension Spring? in reply to Bob (KY), 06-19-2000 13:15:34  
There were after market tension springs sold in the 40's and 50's. I have one, but my other two tractors get along ok with out a spring. Just pull the generator out with a bar or something similiar, and tighten the bolt that the generator sits on. (It is a neat trick to do this)



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