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Front Grease Seal Question
#12841 Mon Mar 08 2004 04:59 AM
Joined: Nov 2002
Posts: 55
LT Offline OP
I'm in the middle of a brake overhaul on my 55.2 (everything new, MC, WCs, brake lines, etc.)

I figured I'd upgrade the front wheel bearings to tapered rollers. I had a machine shop turn my brake drums and they pressed in the races for the new bearings.

Yesterday, I assembled the front brakes. I packed and put the inner bearing into the race, then pushed the new grease seal over the bearing inner race and into the hub. But it seemed loose. I took out the bearing and tried the fit of the seal into the hub. It just slipped right in.

I was expecting a tighter fit that would require tapping the grease seal into the hub. I still had the old grease seal, so I tried it in the hub and it also slid right in and seemed loose. By "loose" what I mean is that when the seal is in the hub, I can easily turn it .

Is this normal or should that grease seal fit tighter?


Re: Front Grease Seal Question
#12842 Mon Mar 08 2004 06:30 AM
Joined: Feb 2003
Posts: 66
Shop Shark
as long as it hits all the way around it should be fine (or so i say. . i am sure others may argue). The reason that they are not "tite" is because then they would just get hot and wear/melt out.

Brian K

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Re: Front Grease Seal Question
#12843 Mon Mar 08 2004 07:36 AM
Joined: Feb 2001
Posts: 1,111
Shop Shark
I believe the outside Dia of the seal is supposed to be tight .
Depending on how loose it is , you might like to try some gasket goo to retain it , or re-source a new seal.

Re: Front Grease Seal Question
#12844 Mon Mar 08 2004 12:19 PM
Joined: Feb 2004
Posts: 20,608
If it's a slip fit with little or no slop in the hole, use a little blue LocTite to secure it. It should be a pretty tight fit in the hub, and a smooth slip fit over the spindle. You will wear the hub if it's allowed to turn there. Don't use red LocTite, or it will be impossible to remove the next time without heating it!

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Re: Front Grease Seal Question
#12845 Mon Mar 08 2004 02:20 PM
Joined: Feb 2000
Posts: 50
rat Offline
I just did the same thing with new bearings and found the same thing. It fits nice around the middle or smaller section of the bearing but just butts up to the outer edge. I was thinking when it is pushed on the hub it will force it to stay pressed against the bearing. Anybody else have any experience with this? :confused:

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Re: Front Grease Seal Question
#12846 Mon Mar 08 2004 06:42 PM
Joined: Nov 2002
Posts: 55
LT Offline OP
Thanks for the help. The grease seal looks like it's designed to spin with the hub. If that's true, then it's got to be either tight enough where it mates to the hub, or something else has to hold it in place. There is another part that fits between the backing plate and the grease seal and bearing. But it looks like that part is not supposed to spin with the hub, and therefore, it can't push against the grease seal. That's the logic, anyway.

Maybe the hub has been worn on the inside surface where the seal mates to it.

I will take the suggestion to find another source for the grease seal on the chance that mine is a little undersized, and I'll get some the Loctite and try that.

We'll see that happens.

Moderated by  Woogeroo 

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