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Ford 9N, 2N & 8N Discussion Forum
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NAA Rear Axle Nut

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Ramrod

11-22-2004 11:59:39




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Sure it's been covered, but can't find it in archives...

What size is that big nut on the rear axle of the NAA, and how hard is it to remove with the tractor up on jack stands?

Ramrod




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Ramrod

11-22-2004 20:04:57




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 Re: NAA Rear Axle Nut in reply to Ramrod, 11-22-2004 11:59:39  
Thanks Guys. I have a 1/2" impact wrench, hope that's enough, I figure to try to jam a long bar in the lugs and let it rest on the ground while I loosen it, looking for an impact socket on eBay, or will try TSC if that fails.

Ramrod



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Mike S

11-22-2004 18:50:50




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 Re: NAA Rear Axle Nut in reply to Ramrod, 11-22-2004 11:59:39  
It is 2". Loosen it while the tire is still on the ground, otherwise you need a damn stout impact wrench to loosen it. It is supposed to be torqued to 450 ftlbs and then pegged with that spring keeper dohicky. I weight about 230 and I tighten mine with 3/4" pull bar with a 3 foot cheater added and I put my weight on it and bounced. I still had one come loose. Now I check them each time I get ready to use it.

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Rick H. Ga.

11-22-2004 18:16:16




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 Re: NAA Rear Axle Nut in reply to Ramrod, 11-22-2004 11:59:39  
Ramrod, the big axle nuts on my Jubilee and 8N is 2". I bought a 2" socket from TSC a few weeks ago. I believe it was around $14.95 or so. I priced one at a local Napa parts store and it was around $55 (ouch!)

As far as breaking the nut loose while it up on jack stands, if it has not been loosened in a while it might be pretty stessful on your trans and rear gears breaking it loose. That is where an impact wrench would come in handy. HTH. Rick H. Ga.

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Dan

11-22-2004 13:20:11




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 Re: NAA Rear Axle Nut in reply to Ramrod, 11-22-2004 11:59:39  
The standard center axle nut is a 2" nut - I got a special wrench JUST for this nut last Christmas in my stocking for my 8Ns :-)

And, it is supposed to be torqued to 450 lbs, not 150 lbs. You pretty much have to hang on the wrench with a cheater bar to get it torqued correctly. And, if it is currently torqued correctly, you will not be able to break it loose while it is up on stands.

Good luck,
Dan

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Leemo

11-22-2004 13:06:24




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 Re: NAA Rear Axle Nut in reply to Ramrod, 11-22-2004 11:59:39  
I think that's a 2 inch nut. I'll try to check tonight. If you don't find out before then put another post up tomorrow. They're supposed to be torqued to 150 ft lbs if I recall. Might be a little tough to break loose..... or it might be loose as all getout like the ones on my Jub were and you'll be able to take it off with your fingers.
Later, Lee



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Bob

11-22-2004 12:20:37




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 Re: NAA Rear Axle Nut in reply to Ramrod, 11-22-2004 11:59:39  
Why don't you measure the nuts, (across the flats) and be sure? If the tractor is on stands, and the nuts are as TIGHT as they should be, they'll be tough to get loose. Put the tranny in first gear, and have someone HEAVY stand on the brakes, for maximum holding power, while you wrench on it.

Of course, it would only take about .5 seconds with a 1" impact wrench!



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