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Old 10-17-2014, 07:41 AM
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bturner2 bturner2 is offline
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Oil leaking from front of hub

Anyone had any experience with oil bath hubs? This is on a 07 tandem axle trailer with the aluminum hub covers. Noticed that I had some brown fluid leaking from the hub onto the front of the wheel last night. The oil in the site window still looks good but I seem to be getting a very small amount of what appears to be oil running down the front of the wheel.

Not sure how these come apart, where any seals may exist or where the most likely cause would be coming from. I plan to pull the wheel off tomorrow and I'll try to get a picture up of the leak this morning.

Beyond changing the oil out a couple years back I haven't touched these. A blow apart diagram and maybe some installation instructions would be nice. Thanks!
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Old 10-17-2014, 07:47 AM
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Hmmm, started searching for my own answer here and it looks like there's a O ring behind the bearing protector. As such I'm thinking it's either that or one of the screws that's leaking. If it's that O ring does anyone know where to get a new one and what kind of wrench do you use to get the protector off?
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Old 10-17-2014, 12:20 PM
mcmx2 mcmx2 is offline
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I do not know if you have the all plastic caps or aluminum with the window to see the oil. The all plastic ones would develop small cracks from the heat and leak like you are seeing. To remove them just put a strap filter wrench on the cap itself and it will thread off. You should be able to get another o-ring at a hardware store or call reliable and they can hook you up with whatever is leaking.
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Old 10-17-2014, 01:56 PM
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Thank you for the response. I have the aluminum caps so I was kind of surprised to see this leaking. I have a oil filter strap wrench that I can tomorrow. Beats spending $25 for a 2 3/8" socket that I saw recommended on another site. I thought Reliable went out of business.
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Old 10-17-2014, 02:58 PM
mcmx2 mcmx2 is offline
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Does this look like your caps? You may want to call and make sure this is the correct size.
http://www.trailerpartsdepot.com/ite...?Ic=OBC-1980AL
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Old 10-17-2014, 04:58 PM
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That certainly looks like it. I'm going to pull the wheel off tomorrow (if it doesn't rain again) and see if I can figure out where it's leaking from. For $17 I'd be very temped to just get a new one, replace the old one and call it a day. Should be interesting to see how hard it is to get the old one off.
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Old 10-17-2014, 05:13 PM
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Had a similar leak on my 07 trailer, which were also fitted with aluminium caps with window. On the alum cap there is an O ring where the oil was leaking from, changed the O ring and problem solved, ofcourse you need to drain oil from hub to do this
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Old 10-17-2014, 08:15 PM
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That's what I figured. Where did you get your O ring from? I like the idea that I can get it from a hardware store. Also like the strap wrench idea.
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Old 10-17-2014, 11:51 PM
jgraham37128
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My neighbor had same issue on his 2006 X30. Removed the cap by hand. Cleaned the o ring tightened back up by hand, and filled back up with oil with no problems.
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Old 10-18-2014, 09:35 AM
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I was able to find a owner's manual from Reliable for the trailer running gear. The torque spec on the caps is only 25 - 30 lbs so they should come off easily. It would be nice if I could find a part number or specification on the O ring. I'm assuming it's nothing special but you never know.

Just my luck it supposed to rain all day and I'll stuck here thinking about it rather than doing something about. Will probably drive me nuts.
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