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Old 07-17-2013, 01:59 PM   #1
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Hub grease leak

Before my first trip of the season, I removed the black rubber hub caps and pumped in fresh grease with the zerks under the caps. When I got to my campground I noticed grease all over my rims.

It looks like there is some cracking in the black rubber caps letting the grease out. I want to fix this before my next trip to the White Mountains and then to the Adirondacks.

Where can I find new black rubber caps? Should I just go with bearing buddies instead?



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Old 07-17-2013, 02:11 PM   #2
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Not sure about the source of your grease leak, but the second photo doesn't look quite right from what I'm seeing - the wheel center hole doesn't appear to be equally spaced around the axle or I'm just not seeing it correctly?
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Old 07-17-2013, 02:14 PM   #3
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I think that's just an artifact of the angle that the picture was taken. They look right in person.... But I will double check when I get home!!
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Old 07-17-2013, 02:19 PM   #4
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I think that's just an artifact of the angle that the picture was taken. They look right in person.... But I will double check when I get home!!
Yeah - a second look shows the top two nuts to be farther away from the wheel center hole than the others - got to be the angle.
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Old 07-17-2013, 02:34 PM   #5
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The first time I pumped new grease in my hubs, I had the same thing. The wheels heat up and the grease flows easily. It makes a real mess to clean up.
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Old 07-17-2013, 02:44 PM   #6
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Each time I've put grease in my hubs, I make sure to wipe out anything in the cap under the rubber plug. At least gives you a fighting chance to catch it before it makes a mess.
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Old 07-17-2013, 04:46 PM   #7
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Any farms shop or tractor supply or auto parts atone has black rubber caps that go over the whole hub assemble, I had the same problem befor I purchased them.. New bearing buddies would be the best move .. But not the cheapest .. You do have an issue . If you go with just caps make sure you keep an eye on the grease level in the bearings. As the caps are not a fix for the leak just a fix for the grease on the rims.
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Old 07-17-2013, 04:51 PM   #8
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Bearing buddies are for boat trailers, to maintain pressure in the grease cavity to keep water out. You don't need them for your camper.
Ours leak as well, one from around the cheap metal cap.
I like the idea posted by Chris, putting the big rubber condoms over the whole thing.
As for the rubber caps, your camper dealer should have them, or try contacting Al-ko directly.
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Old 07-17-2013, 05:51 PM   #9
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My 08 just blew a bearing out while on a weeklong trip to Hanna Park here in Jacksonville. I had grease on the rims, and the plastic cap and the hub metal hammer-in cap were both GONE, and the bearing was offset on the nut from the hole. I had to replace the hub/drum assembly,49.95, and get a bearing repair kit(2 races,2 bearings, hub dust cap, new nut and cotter pin, 3 washers). Brought all of that to the campground, along with my 3 ton floor jack, and some rags and new grease, and fixed it there. WHEW!! I thought I was gonna need to have it flatbed towed home; glad I fixed it! Got wheel bearing kits for the other 3 to do now at home. Randy
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Old 07-17-2013, 05:56 PM   #10
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My 08 just blew a bearing out while on a weeklong trip to Hanna Park here in Jacksonville. I had grease on the rims, and the plastic cap and the hub metal hammer-in cap were both GONE, and the bearing was offset on the nut from the hole. I had to replace the hub/drum assembly,49.95, and get a bearing repair kit(2 races,2 bearings, hub dust cap, new nut and cotter pin, 3 washers). Brought all of that to the campground, along with my 3 ton floor jack, and some rags and new grease, and fixed it there. WHEW!! I thought I was gonna need to have it flatbed towed home; glad I fixed it! Got wheel bearing kits for the other 3 to do now at home. Randy

Just curious, do you have the Ezelub axles with the grease zerks in the ends, and thus do you routinely give them a few shots?
I carry bearing kits with me all the time, but sure hope I don't have to use them. That is not a fun job to do anywhere but in my shop. Can you imagine doing it on the side of the highway?
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