Thread: Discovery hub, can you over tighten?

I just use my W&B 750nm 3/4inch torque wrench to do the nuts up and never had a issue

Isn’t it around the 400 nm ?

Originally Posted by Kaaaiju

I just use my W&B 750nm 3/4inch torque wrench to do the nuts up and never had a issue

You do it to the spec? 490Nm?

I don't think the D2 hub has any lateral pressure on the bearing when doing up the axle nut.
The bearing is prebuilt/preloaded as it's a pre made assembly, and all you do is to tighten the axle onto the inner bearing shaft.

The inner shaft is just a shaft, you don't tighten up to tighten the bearing in any way, like you do in an old Defer/D1/RRC type hub.

So it's unlikely that over tightening has caused the bearing to fail(if that's what happened).

Thanks Arthur, that was what I was thinking, looking at RAVE, the inner bearing race just pushes up against a flange in the drive shaft. No preload or anything.
And yes the bearing has failed. I have the four amigos and the hub is very very hot compared to the other side.
I'll tighten it to spec, as best as I can with a breaker bar, a tape measure and a set of scales, then give it a few uga duggas.

often wondered why they have to be so tight i get that there can be no movement for the abs but wow hard to undo.

Originally Posted by lewy

often wondered why they have to be so tight i get that there can be no movement for the abs but wow hard to undo.

Me too, and I thought that keeping them so hard and tight on the drive shaft may help to eliminate/minimise movement between the splines.

Originally Posted by Bohica

You do it to the spec? 490Nm?

Yes and the harmonic balancer too