rear axel hub on naa ford

Anonymous-0

Well-known Member
Rebuilding an naa ford, found that both of the rear axel hubs were not tight on the axle. the one on the left was worse than the right. The one on the right looked newer than the left. Could soneone put the wrong hubs on this tractor? Is there a difference in ford hubs?
 
I suspect they either didn"t tighten them up properly or the axles are worn and need replacing. Not sure on the NAA but the 8N had to be tightened to 450 lb. ft.
 
Brian is correct, my manual says 450 ft lbs on axel nuts. There should be groove on the nut, all the way around it. There should be a half moon retaining clip that fits in that groove on the nut that snaps into the hole on the end of the axel. This keeps the nut from backing off over time, if you don't have them you need to get them or they will keep coming loose. Good luck!!
 
I did not explain the problem properly. the spline onthe hub are not a wide as the grove on the axle, when tight the hub will move back and forth on the axle. you can't tighten them up enough to keep this from happing.
 
There"s only one choice for the hubs. Sounds like either your hubs or axles are worn. Hubs are softer, cheaper, and easier to swap out than axles. I"d replace them first.
 

As said already, there's only one hub and one axle available. You have wear on the hub splines or axle splines or both. A good axle and hub looks like this when assembled.

hubsplines.jpg


If the axle splines protrude further than this in the hub they won't tighten up and you need to replace some parts.
 
A blacksmith fix. Take an arc welder turn it up pretty hot and run a bead around the hub in the area that's red in your picture. The weld will shrink the hub. If it to worn for this to work it was junk anyway.
 
Thanks for the info & help, I was hopeing that I could find an easy fix for my problem. looks like it will be new hubs. thanks and have a good day.
 
Ran into that same issue on my Jubilee several years ago. Ended up turning a washer such that the nut could bear tightly against the hub. No more side-to-side play. Been running fine for 6 years now.

Washer was maybe .060 - .080" thick.

Pete
 
yep. fix em right.

there are tricks you can do like shimming. but those are bandaids meant to get the tractor in the field to beat rain.. etc... not permanent fixes.
 

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