Rear hub leak

[oddshapedballs]

Looks like I have a small leak around the circular black rear hub cover thingy. I have a half inch wide deposit of oil on the outside and inside as you look through the hub.
Is this common, is it an expensive fix, can it be done by me on my driveway, will it wait for a while or will the seal (assuming there is one) just suddenly go pop and chuck of of the final drive oil out in one go?

 

[Bendy toy]

Short answer is yes, yes, no, no.

The seal has already gone pop which is why there's oil on the drive. Using it will just cause more damage. Its most likely the wheel bearing - if the wheel rocks sideways there's your culprit.

You might want to consider a full on rebuild costs are reasonable if you check around.

Heres one to be going on with
http://www.ukgser.com/forums/showthread.php?t=341578

 

[Pukmeister]

It could be as simple as dirt under the seal lip, or overfilling of the final drive causing it to leak once hot as the air space pressurises inside. Later bikes have a breather fitted to the FD for this reason.

You could remove the plastic trim from the seal and wipe under the seal lip with the edge of a sheet of paper. It worked on my 2004 bike. You can also pull the seal and replace in-situ providing the FD bearings have no play.

 

[oddshapedballs]

Popped the bike up onto the centre stand pulled, pushed and whacked the living daylights out of the rear wheel, no play at all thank goodness.

I'll try as suggested and pop off the black round cover, wipe it and monitor for a couple of days. I'm assuming it's a lever off with a flathead screwdriver job?

 

[Bendy toy]

One of these might help.
http://www.dirtbikebitz.com/motion-pro-seal-mate-fork-seal-cleaner-p-9645.html

 

[JPR]

Changing the seal is a piece of cake

 

[Sgt Bilco]

Short answer is yes, yes, no, no.

The seal has already gone pop which is why there's oil on the drive. Using it will just cause more damage. Its most likely the wheel bearing - if the wheel rocks sideways there's your culprit.

You might want to consider a full on rebuild costs are reasonable if you check around.

Heres one to be going on with
http://www.ukgser.com/forums/showthread.php?t=341578

Nothing like panicking the OP

It's the outerseal which has gone as is a quick and cheap fix. However, you aren't losing much oil as it's misting rather than leaking.

 

[Deleted account 211025001]

Nothing like panicking the OP

It's the outerseal which has gone as is a quick and cheap fix. However, you aren't losing much oil as it's misting rather than leaking.

Yup, he says it like it is, no need to stress

Andres

 

[oddshapedballs]

Thanks all, I've cleaned the area, popped off the black ring and given all around a good clean, and will monitor over the coming weeks.

No movement in the rear wheel, did the whole 6 o'clock/12 o'clock wobble etc and all feels fine. I'll get a new seal and keep it handy.

Cheers.

 

[earthmover]

Mine did over 3000 miles with it "misting" whilst in America. Didn't want to hold up the schedule, so got it fixed when we got back. No problems whatsoever.
Monitor it, and treat accordingly.
Mark

 

[Bendy toy]

Nothing like panicking the OP

It's the outerseal which has gone as is a quick and cheap fix. However, you aren't losing much oil as it's misting rather than leaking.

Yes, but OP did say it left oil casing and tunnel so its hardly "misting". If the seal has failed there usually a reason often the bearing behind. If that breaks up... etc, etc.

One of these is worth a try but monitor it VERY carefully.
http://www.abebooks.co.uk/servlet/S...ed=all&sortby=17&sts=t&tn=sled+driver&x=0&y=0

http://www.ebay.co.uk/itm/RHINO-SEA...orcycle_Parts_Accessories&hash=item3ccb304fdc

Mine has all the symptoms described below (except no leaks and no slack wheel bearing) and its had new oil. Should I have it rebuilt just in case? Im not rolling in cash so its staying put. But might regret not doing it sooner when the time comes.

http://www.ukgser.com/forums/showthread.php?t=341578

 

[juddadredd]

I love Bendy he cracks me up, I can just imagine the OPs face thinking SHIT !!

I did mine with no problems on my drive and I also changed the flipping stinking rotten oil that was in there - I also had lots of water and crap in the upper part not the final drive bit but the axel bit - so cleaned wd'd and molly'd it.

Then changed the Gearbox oil total time about an hour.

Pleased to say runs like new.

 

[Bendy toy]

Just telling how it is. I avoided a Mk1 1200 for this reason. Maybe overkill. Maybe not. Im not planning to strip mine until it leaks or the wheel wobbles.

Seals dont just mist oil unless (1) the casing vent is blocked or was over filled or (2) the bearing behind is failing.

The described amount of leaked oil doesn't sound like mist to me so the bearing behind has to be proved OK before anyone can say its simply a rogue seal.

 

[oddshapedballs]

OK, so here's the weird bit; I cleaned off the half inch ring of oil from outside and inside of the hub, whipped off the black dust cover cleaned out the small amount of old oily stuff/road shit build up etc and put the now clean cover back on, took it for a 100 mile run mixture of fast (and I mean fast) motorway and A+B roads and not a friggin drip, no misting, no nothing, re-checked the rear wheel for any play, nothing??!!

I did do the final drive service a couple of months ago and haven't ridden more than 2k since then so maybe I over-filled it.

Onwards!!

 

[Pukmeister]

Post #3

 

[oddshapedballs]

Post #3