Rear wheel hubs jamming after new bearings???

[Z.]

Hoping someone can help me here, I've just replaced the rear wheel bearings on my 280zx and now after I've torqued up the stub axle it's jammed and won't turn. When I've got the stub axle on with the nut done up firm but not torqued the thing turns fine, it's only when I torque it?

 

Additional Note: I can't find the spacer that's suppose to go between the two wheel bearings but I don't think this is crucial because both bearings sit up against shoulder and so can't move anyway and I can't see how this would cause the thing to jam?

[Riceburner]

I try it with the spacer in. Without the spacer there won't be any load on the inner race of the bearing. Everything will be trying to turn the outer race of the bearing which when torqued to spec is getting pushed hard on the shoulder inside the hubs.

 

When I did mine I also had an issue with the inner seal not going in all the way. The inner companion flange was then touching it and stopping the stub axle from turning.

[Wayne G]

find the spacer.  While looking for it think about the problem you induce by torquing the stub without something solid fixing the distance between the inner races and limit the crush of the bearing inner to outer races.  If you cant find one make one

[Z.]

Thanks for the advice fellas.. I see what your saying I guess if there's nothing supporting the inner race it could be getting pushed out of line and jamming up. I'll get another turned up on the lathe and let you know how it goes. Thanks again

[Scoota G]

Here's a question. Is the spacer the same as 260Z?

 

[Scoota G]

On this spacer you can see how heat has effected each side near the bearing. Must have some pressure on it!!

[lampy]

I know on a 1600/180b trailing arms which is nearly identical to a 240z/260z there is a letter A, B or C stamped on the top on the bearing housing. This corresponds to a A, B or C on the spacer. Different letters are not interchangeable. Some spacers are larger to adjust the crush on the bearings.

 

It may be the same on the Z rear hubs. I think it talks about it in the manual

[Z.]

Thanks for the advice Lampy, appreciate the heads up! I did manage to find the coding system in my manual however I couldn't see anything on the housing not sure if it's worn off or if it never had one? I've got a friend of mine machining up a sleeve to the lower end of the tolerance for the largest sleeve atm and I'll just try that and if it's still not right I'll shave it down to the next tolerance until I get it right. Hopefully it works out!