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MG TD TF 1500 - rear hub oil leak

Hello,
I'm wondering what prevents the axle oil from leaking along the wheel shaft, past the inner bearing race and the taper collar ? Just mating surfaces ?

Laurent.
LC Laurent31

The oil seal inside the axle retainer is my guess.

Peter
P G Gilvarry

The oils seal inside the axle retainer is my guess.

Peter
P G Gilvarry

Thanks Peter, but the seal is outside the taper collar.
My concern is about the inside of the collar. Between the collar and the shaft.

Laurent.
LC Laurent31

Before I got my car back on the road several years ago (with a lot of help from this forum, I might add), oil would always leak from one hub into the brake drum. When I cleaned the axle housing up I discovered that the tiny vent hole in the axle was clogged with years of built-up crud and internal pressure was causing the leak. I didn’t make any changes to the axle, bearings, brakes, or anything else except clean things up and it hasn’t leaked a drop since.
Joe
Joe Olson

Hi
I fitted an MGB vent to my axle to overcome the pressure problem, no leaks since.

Barry
B Bridgens

Laurent,
The oil seal lip runs on the parallel portion of the taper collar, see H.15 in WSM.
The taper collar is forced against the halfshaft shoulder, sealing that track.
I also use single sided seal wheel bearings, or hook out one side of a double.
Plus I have a pigtail vent in the diff filler plug as I do not want the original hole in the diff tube to let in crud.
Ray TF 2884
Ray Lee

Thanks Ray,
If we look at the WSM p H15, the collar is forced against the outer side of the inner bearing race. And that is probably only those mated surfaces that prevent oil from leaking out of the oiled bearing.

And it is probably similar for the inner side of the inner bearing race that is forced against the distance washer and the halfshaft shoulder.

I note also that on p H3, the collar is identified as "3-collar-oil seal".

So If we have to change one of them, we probably have to lap both surfaces together.

Laurent.
LC Laurent31

Might be an idea to lap replacement halfshafts and taper collars in.
The one between the bearing and the halfshaft shoulder does not need to be lapped as it is before the seal surface. It is only there because the halfshaft fillet radius is larger than the standard bearing fillet and the bearing would foul before seating.
Years ago I wrecked a bearing getting it off after forgetting the filler. After 48 years I think I know all the things I should not do. {:-)
Ray
Ray Lee

I think that oil might find its way between the shoulder of the shaft, the distance washer and the inner bearing to the shaft iteself. It could then flow under the inner bearing, under the collar till the drum.
I think that lapping would be a benefit on both sides, including the distance washer.

Laurent.
LC Laurent31

This thread was discussed between 21/08/2022 and 24/08/2022

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