Oddie · Feb 8, 2008

Hi folks, hope yer all havin a nice evenin!

Spot of advice if you got a mo...

I am systematically trying to change all my bearings coz i had a scarey moment when one went suddenly the other week and threw me into oncoming traffic, and am having a spot of bother getting the things back together.

Haynes BOL says on refitting "13. Carefully slide the hub assembly on to the stub axle taking care not to damage the oil seal lips". The problem i'm having is the hub seal goes on the assembly after the bearing has gone in, and the bearing is INCREDIBLY tight on the half shaft which makes it really difficult to push the assembly all the way on to sit tight against the end of the halfshaft. (it can only be put on as a whole assembled unit as the seal hole is smaller than the diameter of a bearing so the bearing has to go into the assy before the oil seal goes on).

Does anyone have any top tips on how to get the thing all the way down the shaft?? preferrably (but not necessarily) without a mass of innuendo!

I guess there is a simple answer. I got the hub spanner the other day and that helps, but i am wary of using it as a tool for bashing the assembly down the half shaft (or is this what it's meant for?)

Ta muchly

Odie

GRUNT · Feb 8, 2008

Is it a new bearing thats incredibly tight an was the old bearing as tight? If so are you fitting the right size bearing?

landysrule · Feb 8, 2008

I thought the oil seal went on first then the first bearing? Do you mean stub axle you are putting the bearings onto and not half shaft? I had a tight one last time just needed a little persuasion to get it over the first bit then it lined itself up square and went on ok.

slob · Feb 8, 2008

is yer shaft clean. i.e it int got any lumpy bits on it where the old bearing got hot , welded itself to the shaft then tore its self apart. it should be smooth and uniformly shiney

Oddie · Feb 8, 2008

GRUNT said:
Is it a new bearing thats incredibly tight an was the old bearing as tight? If so are you fitting the right size bearing?

Yeah, the old bearing which had gone had to be cold-chiselled off the halfshaft it was so tight! Just got the standard 90 bearing (which i think is the same for all defenders and discos) - it was very tight up against the end flange (that's one of them great words which soulds incredibly rude but isn't realy, love it!)

It all came off OK coz it was the inner bearing which was in pieces so it pretty much just fell out.

Oddie · Feb 8, 2008

slob said:
is yer shaft clean. i.e it int got any lumpy bits on it where the old bearing got hot , welded itself to the shaft then tore its self apart. it should be smooth and uniformly shiney

It seems to be - i suppose i could have ovalized it a bit maybe when i bashed the old one off, do they normally just slide on nice and easy - in which case i better get meself a new half shaft

Oddie · Feb 8, 2008

landysrule said:
I thought the oil seal went on first then the first bearing? Do you mean stub axle you are putting the bearings onto and not half shaft? I had a tight one last time just needed a little persuasion to get it over the first bit then it lined itself up square and went on ok.

It does but you have to physically fit physically fit physically physically physically fit the oil seal into the assembly before you re-fit it else it just flaps about between the assy and the flange doing nothing, and you can't do this unless the bearing is already in the assy.

GRUNT · Feb 8, 2008

Dunno if my memry is working right here but dunt it go together like this:-

put yer inboard inner race on the stub shaft.
then put yer inboard outer race and bearing cage in the hub
then put yer seal in the hub.
then put yer out board outer race in the hub
then slide the whole thing on the stub shaft.
then put yer outboard cage and inner race on the stubshaft
then put the spacer washer and nuts on.

Oddie · Feb 8, 2008

nearly, the problem is that the seal won't fit over the initial inner race on the stub shaft which means the oil seal effectively has to go on before the inner bearing race goes into the hub. The inner bit needs to be built before the hub goes back on, but the inner hub is so tight on the half shaft that the only way to get it on seems to be with a mallet, which can't be done because then you can't then get the oil seal in!

I have a feeling from what someone said that the half shaft may have become warped - in your experience, should the bearings fit over the half shaft fairly easily, right the way up to the flange?

GRUNT · Feb 8, 2008

Yes, you shunt have to hammer them on. if you put the inner race in boiling water to heat it up and expand it would that make any difference.

GRUNT · Feb 8, 2008

Ave just edited post 8 to make more sense.

Oddie · Feb 8, 2008

The bearing cage is part of the inner race! It's a two-part bearing.

GRUNT · Feb 8, 2008

I've just found some pics from when I did mine, an it looks as if my memory was wrong cos it shows the inner race in the bearing fitted to the hub with the seal fitted after it.

slob · Feb 8, 2008

dint someone have trouble with thi sbefore? turns out he'd left half the bearing on. ad do a search fer yer but i can't be arsed so yer can do it yerself

GRUNT · Feb 8, 2008

Ahh mine was in three bits, inner race, bearing cage, an outer race.

Oddie · Feb 8, 2008

slob said:
dint someone have trouble with thi sbefore? turns out he'd left half the bearing on. ad do a search fer yer but i can't be arsed so yer can do it yerself

Nah, i did that at first but saw what i'd done and got the rest of it off with a big hammer!

GRUNT · Feb 8, 2008

slob said:
dint someone have trouble with thi sbefore? turns out he'd left half the bearing on. ad do a search fer yer but i can't be arsed so yer can do it yerself

Aye thats right Lordslob he ended up getting a new stub shaft.

slob · Feb 8, 2008

aye that wur the one

Kennymac · Feb 8, 2008

Hey,

there's a picture by picture break down of disk removal /replacement article in LRM, showing the order of the bearings and washers etc. in this months edition If that helps.
cheers
K

Griffdowg · Feb 9, 2008

slob said:
dint someone have trouble with thi sbefore? turns out he'd left half the bearing on. ad do a search fer yer but i can't be arsed so yer can do it yerself

yer, twas me!

the oil seal should slide on nice n easy and the whole thing should go as a unit. bearing in, seal on slide onto the stubby. maybe you got the wrong seal? maybe its a poorly made ****-part one? i had a flexi brake hose the other week that they ****ed up the threads on... its possible!

G

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