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8N Axle Nut

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Harry

06-22-2000 10:05:14




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Zane,I've been looking for the torque value for the axle nut. The Vintage Ford Tractor Resource Torque Specs indicate 450 ft-lbs. I have a hard time believing this value. Could not find a value in the owner's or shop manual. Need help!




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bg

06-22-2000 19:45:44




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 Re: 8N Axle Nut in reply to Harry, 06-22-2000 10:05:14  
pp 133, page 82 FO-4(1995 ed) pp 90, page 29(1990 ed & 1952 ed)) 450 ft-lbs. You can rent a BIG torque wrench or borrow one from a heavy-equipment mechanic, or do the math(2.5' bar w/ 180 lbs will come close) Like Zane says, if the threads are stripped or beat-up, it may be a losing proposition.



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Harry

06-22-2000 21:41:05




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 Re: Re: 8N Axle Nut in reply to bg, 06-22-2000 19:45:44  
Thanks bg, most things I've done on the 8n are grade 5 and the largest torque wrench I have is 150 ft-lb. I'll just use my 3/4 drive with a pipe like you indicated. Just had to verify, the number looked out of place. There is sure going to be alot of hoop stress stored up in that axle and hub unless that hub deforms.



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Frog Level

06-22-2000 12:30:40




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 Re: 8N Axle Nut in reply to Harry, 06-22-2000 10:05:14  
That's the only number I've heard. Check the archives because I know it's been discussed here before.

Put your 180 pounds on the end of a 2 1/2 foot breaker bar (including pipe extension, if needed) with a 2 inch socket. If the wheel gets loose, bad things happen...wheels wobble, seals leak, etc.



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ZANE

06-22-2000 14:57:18




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 Re: Re: 8N Axle Nut in reply to Frog Level, 06-22-2000 12:30:40  
That sir is just like it is!

If the nut has been allowed to run loose too long it may not tighten the hub to the axle because if run loose the axle and hub splines are worn down past the allowable tollerances and the end of the axle will protrude from the end of hub and that is all she wrote until a new axle and hub are installed. I have never seen one secessfully repaired.



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Harry

06-22-2000 15:50:27




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 Re: Re: Re: 8N Axle Nut in reply to ZANE, 06-22-2000 14:57:18  
Thanks for the replies. I just had to check. Never seen a 450 ft-lb torque wrench. The axle is a tapered spline to the hub with fine threads and with 450 ft-lbs of torque I questioned if the material could take the tremendous pressure. Another point is the retainer wire spring end appears to go into the axle thread slot to hold the nut. This would indicate to me that after obtaining the 450 ft-lbs of torque one would have to back the nut off to line up with the slot.

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Big Jake

06-23-2000 09:55:03




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 Re: Re: Re: Re: 8N Axle Nut in reply to Harry, 06-22-2000 15:50:27  
Heck they make torque wrenches alot bigger than
450'lbs. I use one that goes up to 1000'lbs. it's 6' long too!



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Big Jake

06-23-2000 09:54:37




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 Re: Re: Re: Re: 8N Axle Nut in reply to Harry, 06-22-2000 15:50:27  
Heck they make torque wrenches alot bigger than
450'lbs. I use one that goes up to 1000'lbs. it's 6' long too!



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Redbelly1

06-23-2000 04:26:08




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 Re: Re: Re: Re: 8N Axle Nut in reply to Harry, 06-22-2000 15:50:27  
harry, if you have doubts about the threads on the axle , you might consider a compression locking nut.these are available at a new holland dealer. i have them on both my axles just to be safe. better than buying an axle.



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Harry

06-23-2000 13:26:10




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 Re: Re: Re: Re: Re: 8N Axle Nut in reply to Redbelly1, 06-23-2000 04:26:08  
Thanks Redbelly, the nut does appear small and the washers look like they have been through the war. A compression locking nut might be the answer.



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