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Discussion Forum

Axle leak

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fred (ark)

05-25-2002 19:44:34

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i hate to be a pest, and ask two questions in on day, but i'm new here and am impressed with th amount of experience. anyway, here's my problem. when i first got my current 8N about six years ago, the left axle leaked oil out around the large center end nut. i took it to a tractor mechanic about 40 miles away as it was the closest to me. he said it needed a new seal, and put one in. when i got home, i noticed that as soon as i started using it again it started to leak just like before. i saw that the nut was not completely tight and i could shake the wheel. i looked in a manual and saw that it took a lot of ft-pds of torque, so i got a large torque wrench and tightened to spec. guess what....it still leaked and had a little play. looks like about 1/16 inch between nut and hub, even though the nut was as tight as it could be. i have just been using it like that ever since. the whole wheel is covered in oil and the brake no longer works on that side. but if any of you 'ens could tell me what i need to do to fix it, it would sure be nice to dry out that side..... .

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05-26-2002 03:34:33

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 Re: axle leak in reply to fred (ark), 05-25-2002 19:44:34  
Fred,and Tim.Try this site out Link once on John's web page go to the FAQ section.He has a detailed section on replacing the rear seals.Hope this helps you.Larrys8n

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Scott N KY--what ZANE said

05-26-2002 17:46:19

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 Re: Re: axle leak in reply to Larrys8n, 05-26-2002 03:34:33  
..I just did this job recently.. I had about 1/16 in of slop in between the axle and the nut.. and can we say oil leak? !!!..I replaced the axle bearing and race, the cork "seal" the outer rubber seal, the hub ( the old parts guy at Ford?New Holland said its real rare for the axle to wear out.-take note here ..This has leaked and shaked for over 4 years.) I then torqued {!} the new nut and washer - translated I took a pipe wrench and put it on my socket, put a 8 ft long piece of pipe on it an bounced down on it..all 150 lbs of me..
I've put about 10 hours on it so far with no leaks..Oh I also replace the brakes..they were too oily for brake clean

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05-25-2002 20:03:07

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 Re: axle leak in reply to fred (ark), 05-25-2002 19:44:34  
To actually fix the problem you have it is going to take at least a new hub and seal(s)and possibly a new axle to ever get it to stop leaking. The hub can actually strip the spline completely out if it is run long enough. I have seen it cause the wheel to fall off too because the nut is constantly being hammered when in use when it is loose like that.

Sometimes a new hub will fix the problem if the axle spline is still good enough so that when the nut is tightened there is still a gap between the nut and the shoulder at the outer end of the axle spline.

This is a tapered spline and if the taper is worn off just a few thousanths the hub cannot be tightened before the axle nut makes contact with the end of the axle spline.

You could washer it up so that the hub can be pushed further up the axle spline but if you do this then the hub is going to begin to rub the brake shoe return springs and make a heck of a racket and cut the springs into eventually.

I have fixed a few by cutting 6 shims from hard steel banding material and placing them in the spline between the hub and axle and tightening the hub with the nut. You have to re-tighten the nut a few times every hour or so after this fix or it will be loose as a goose again in a matter of a few hours.

A new axle and hub and seals is the best fix in the long run if you got the cash.


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05-25-2002 21:00:38

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 Re: Re: axle leak in reply to ZANE, 05-25-2002 20:03:07  
Mine is leaking too. So bad that I have lost 3 lug bolts. How will I know how much needs to be replaced? Would I have to pull the axle to replace the inner seal? How big of a job is that?

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05-26-2002 05:50:00

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 Re: Re: Re: axle leak in reply to Tim, 05-25-2002 21:00:38  
It is possible that your tractor does not even have an inner seal. If the tractor was made befor about 1951 it will not have an inner seal. Only the outer one that rides the hub.

Take the wheel off.

Remove the hub from the end of the axle. This could be the worst part if it is tight as it is supposed to be. It will take an old fashioned hub puller to ever move it. Heat and a sledge hammer might work but it is possible to bend it and warp it this way.

Take out all the nuts and bolts from the inner bearing hub and pull the axle out of the trumpet housing. The inner seal will be in the trumpet housing about three inches inside.

The outer seal is in the bearing hub and can be removed by removing the remaining bolts that are from the outside of the brake backing plate and seal retainer. Be sure to study the positioning of the seal and the brake backing plate and mark everything before you remove those last bolts or you may have to put it together and take it apart several times until you get it back like it has to go.

Mark it good.


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05-26-2002 08:15:17

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 Re: Re: Re: Re: axle leak in reply to ZANE, 05-26-2002 05:50:00  
Tim, the inner seal came out in 1949.

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