Vehicle & Technical > Discovery

Wheel bearing adjustment...how do you do it?

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Les Henson:
How to replace a wheel bearing-

http://forums.lr4x4.com/index.php?showtopic=8009


Les.

Range Rover Blues:
Using a DTI is the most accurate way, except that is the inner seal is new then the lip is so stiff you can't feel any endfloat :roll:

SO, assmble the 2 locknuts and washer, finger tight at least then lever against the washer ans the hub, you should be able to push the hub away from the hubnuts and open a gap between the inner nut and the outer bearing.  Stick a feeler guage in that gap (the correct size of course) to check if you've set it right.

Excessively loose bearings are not good, but as long as there is some play they are not too tight.

You'll also find that tolerances were tightened up on later cars, though the bearings are the same part.

Slackening off between 60 and 90 degrees often suffices, once you've done a few you'll get the feel but be careful, if your nuts are loose on the thread then any clearence that comes form backing the 1st but off 90 degrees is lost when you tighten the locknut against it, so you have to check it once the nuts are tight.

The probelem I find with having the bearings adjusted right up is that the pads never get pushed clear of the disks like they would if the hub was a bit looser, so they squeak.

Iain C:
Thanks for the tips all.  I reckon I've done it about right by feel, we'll see when it's on the road and the new discs and pads have bedded in a bit.

However, I took the n/s/f hub off to put the new disc on, and I can't for the life of me get the 2 shims on behind the circlip on the end of the driveshaft.

I can't work out why...I've not changed that wheel bearing (although I did put a new hub seal on) and the hub is definitely fully home, and I've put a bolt in the end of the shaft and it won't come out any more.  

So the circlip is there on it's own, will this be OK?

Range Rover Blues:
Not really in the long term, no. How thick were the shims?

These control the endfloat of the CV in it's bearing and via that the float of the whole halfshaft.  If you havn't done anything with the bearings then I'd guess it's becuase the new outer seal (inside face of the hub) is hard up against the stub axle flange where it runs.  Otherwise something hasn't gone back together right.

Iain C:
I don't have a micrometer but both together would be under 1mm thick.  If it's potentially the hub seal, shall I just let that bed in for a couple of hundred miles or so and have another go at getting them on?

I can feel the endfloat, but pulling the shaft outwards results in it coming to a firm stop leaving enough room for the circlip only.

The truck drives fine, the hub bearing seems fine with the wheel on, and with brand new discs and pads (so caliper pistons all the way in) there's not much room for error, or the pads might not have gone back in the calipers ok...

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