Final Drive ?Rear Seal

[pathy]

Ok last August, I replace the large seal and bearings on the crown gear at about 182 000kms. The old seal was not leaking, just thought I would replace it while I was doing the bearings. The seal lasted for about 3600kms and then started leaking. It was a genuine seal. The old seal was installed flush, so I installed the new one flushed. You could see where it was wearing compared to the old one. So I installed a non-genuine seal a bit further in on the shiny surface. This seal has leaked from day 1. One of the mechanics at work said it will wear in. It is well over 3000k's, has slowed up ever so slightly. Should I put up with it waiting for it to take up, or should I replace it again. It is about a drop of oil when I stop and park the bike, but not every time.
Marc

 

[gsaddict]

Welcome to the forum.
First question. Is there play in the FD? Is it preloaded correctly?
It appears all your problems started after you changed the crown bearing.
Note: The seal is a directional type so I'm not sure what the non OE one is.
How bad was the groove on the crown gear? Any rust?

 

[pathy]

Welcome to the forum.
First question. Is there play in the FD? Is it preloaded correctly?
It appears all your problems started after you changed the crown bearing.
Note: The seal is a directional type so I'm not sure what the non OE one is.
How bad was the groove on the crown gear? Any rust?

No play.
The preload is good.
The first seal was intalled flush, but was wearing in a different spot to the original.
The last seal I installed a bit further in running on a nice clean shiny surface, but still clear of the bearing. Measured carefully from the hub edge to the seal to keep it square.
Marc

 

[jandhumphreyme]

If it's leaked from day one I'd change it, sounds like it got damaged during installation or there is rust or a microscopic burr on the shaft.

 

[gsaddict]

No play.
The preload is good.
The first seal was intalled flush, but was wearing in a different spot to the original.
The last seal I installed a bit further in running on a nice clean shiny surface, but still clear of the bearing. Measured carefully from the hub edge to the seal to keep it square.
Marc

To be clear, there is no discernible play on the FD presently. correct?

 

[AntonLargiader]

It shouldn't leak at all, and historically they don't leak at all. If the surface of the hub is smooth and the seal is installed properly, there's just not a problem. So, something else is going on here.

Is there ANYTHING non-standard that happened during the bearing replacement? Tell us all the details you can remember.

 

[gsaddict]

Here is a detail shot of the directional OE seal I was speaking of.
Does your aftermarket seal have the directional moulding in the sealing lip?

 

[pathy]

To be clear, there is no discernible play on the FD presently. correct?

Definitely no play.

 

[pathy]

It shouldn't leak at all, and historically they don't leak at all. If the surface of the hub is smooth and the seal is installed properly, there's just not a problem. So, something else is going on here.

Is there ANYTHING non-standard that happened during the bearing replacement? Tell us all the details you can remember.

Not that I can remember, everything was straight forward.

 

[pathy]

Here is a detail shot of the directional OE seal I was speaking of.
Does your aftermarket seal have the directional moulding in the sealing lip?

Don't remember.
Marc

 

[pathy]

Here is a detail shot of the directional OE seal I was speaking of.
Does your aftermarket seal have the directional moulding in the sealing lip?

Yes the seal is directional.
Marc