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front hub seals "photos added"
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Author:  kiwiinwgtn [ Sun Jul 01, 2012 5:43 pm ]
Post subject:  front hub seals "photos added"
I am reassembling my Cooper S disk hubs.

I have always had trouble with grease getting on to my rotors only on the right hand side.

I noticed tonight that the left hand hub has an extra ring which sits above the bearing cup then the seal sits onto it.

Could this be the cause of my problem

also how much grease do you need to put in the bearing.

I will try and find my spare camera to take a pic

just another thought is there a plastic shield that goes on the cv

Ta

Kiwiinwgtn
Author:  kiwiinwgtn [ Sun Jul 01, 2012 6:31 pm ]
Post subject: 
Image


Image


there appears to be an additional ring in one of the hubs
Author:  miniDave [ Sun Jul 01, 2012 7:09 pm ]
Post subject: 
Kiwi,
Yes the ring is to space the inner seal correctly onto the CV. I have had some of the 'new' tapered bearing kits that have a small plastic spacer thing that goes on the inner side that does the same thing.
Author:  kiwiinwgtn [ Sun Jul 01, 2012 7:44 pm ]
Post subject: 
thanks.

lets hope I can find one

looks like part 21a1307 is what i am after
Author:  simon k [ Sun Jul 01, 2012 10:18 pm ]
Post subject: 
miniDave wrote:
Kiwi,
Yes the ring is to space the inner seal correctly onto the CV. I have had some of the 'new' tapered bearing kits that have a small plastic spacer thing that goes on the inner side that does the same thing.


I thought that plastic ring went on the outside of the seal.... there was a lip on the inner (CV side) seal that it fitted over. Unless we're talking about something different. Never mind :)

That split ring should be there, but it's not essential. I assume most of them got thrown away by ham fisted mechanics who discovered them after putting a customers car back together and had left them out by accident.

All I used to do (before I bought my current car that does have them still) was make sure the inner seal was only in as far as the machined part of the upright - IE only in as far as it needed to go.
Author:  Irish Yobbo [ Mon Jul 02, 2012 10:10 am ]
Post subject: 
As for how much grease you need, they refer to it as 'grease packing' because you need to pack as much grease in there as possible. You need to get your hands dirty, smear grease over all the rollers and roll them around so the grease gets through to the other side. Repeat until it's full. You might want to put some more grease on the inside of the outer race as well. Once you have the whole thing together, wipe off the excess.
Author:  drmini in aust [ Mon Jul 02, 2012 2:43 pm ]
Post subject: 
The split steel spacer ring is a good idea if you have one, otherwise you can knock that seal in so far that it fouls on the inner journal of the tapered roller bearing (doesn't happen with ball bearings).
From memory, the disc brake/tapered roller hub ones are .205" wide (the drum brake/ball bearing ones are much narrower).
Author:  simon k [ Mon Jul 02, 2012 4:41 pm ]
Post subject: 
Irish Yobbo wrote:
As for how much grease you need, they refer to it as 'grease packing' because you need to pack as much grease in there as possible. You need to get your hands dirty, smear grease over all the rollers and roll them around so the grease gets through to the other side. Repeat until it's full. You might want to put some more grease on the inside of the outer race as well. Once you have the whole thing together, wipe off the excess.


the technique I was taught is to put a big glob of grease on the palm of one hand, and push the side of the bearing down onto it, so as to force grease up and through the rollers - that way you get any air bubbles out and it's completely filled.

putting too much grease in can generate heat and burn it...

there's actually a formula based on the surface area of the rollers, faces and some other stuff that tells you exactly how mych grease should be in there. I'm told that if you take apart an OEM Toyota (etc.) bearing, it's amazing how little grease is in there
Author:  kiwiinwgtn [ Mon Jul 02, 2012 5:00 pm ]
Post subject: 
ok, I think the seal could have been in too far and I may have been a tad generous with the grease.

I do have a bearing packer which I can use as it does a good job.

now what grease is good.
Author:  drmini in aust [ Mon Jul 02, 2012 7:04 pm ]
Post subject: 
kiwiinwgtn wrote:
ok, I think the seal could have been in too far and I may have been a tad generous with the grease.

I do have a bearing packer which I can use as it does a good job.

now what grease is good.

Don't totally fill the space between the bearings...
As for grease, Castrol's HTB is good, but I used Mobil Supergrease in mine ~15 years ago- it (and the bearings) are still good. I had to remove a CV recently to replace a boot (so I repacked that side with the same stuff).
Author:  kiwiinwgtn [ Mon Jul 16, 2012 10:03 pm ]
Post subject: 
ok i have found a metal ring.

I have also got the plastic type now are unsure which one to use as the plastic one is about twice the width of the steel one

how can I tell which one to use, it appears to be dependent on the type of bearing

Thoughts..
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