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Gary

Oil Bath Axles

We've had a few Owner Operators with new trailers have some trouble with wheel seals going out. I thought this would be a good subject to post on here. Larry one of the Owner Operators working with us has a new trailer and has had the axle seals go out 4 times in about 2 months. Tim another Owner Operator that just started working with us is having the same problem. The reason for the seals going out seems to be due to pressure building up in the hub. Oil bath hubs have always needed to be vented, but it seems that dexter has put out a batch of axles with out vented rubber caps. The rubber caps on the axle end thats used to fill will oil should of had a small barely noticeable hole or slice in the center of them. These holes are designed to act as a vent for relieving pressure as it builds up. If there not working correctly the pressure will find a spot with the least resistance to escape. Thats usually the wheel seal on the back of the hub. If you have oil bath axles you should check to make sure there vented and make sure there clean from time to time also. It's natural to have a little spot of oil around the vent hole on the rubber cap. What can happen though is if there's oil on there and you drive across a dirt field or most commonly along a dirt shoulder on the road the dust will stick to the oil and possibly clog the vent hole. Keep them clean!

For those of you with new trailers with oil bath axles you may want to check to make sure there vented. If you pull the cap and notice pressure releasing there's a good chance your caps are not vented correctly or clogged. Without a place for pressure to escape sooner or later you'll blow a wheel seal out.
Dreamer

Thanks for the info Gary. My 'new' 3/4 car hauler has 2 9k oil bath axles and the info above surely helps. Your tips and stories have proved invaluable to me and I try to refer as many pple this way as I can. Hopefully they can reap benefits too.
Gary

Thanks Dreamer, Glad I could help.
Guest

Anyone who has had this problem and incurred an expense from repair on a new trailer with DEXTER axles can have it processed under warranty and try to recover some if not all of their money.
 If you lost bearings, ruint a hub or spindle anything at all you can recover it. ask the dealer you bought from or call DEXTER DIRECT. DO NOT TAKE NO FOR AN ANSWERE .

Don
ccoop769

I got the 10k oil baths and 1 is leaking all over rim. But it still looks full of oil. Where would i go about getting new caps and seals?? Just call up dexter
Gary

Is it leaking from an inside seal or outside seal? Either way any trailer parts house should have the parts or atleast be able to order them for you. Check with Napa Auto Parts, sometimes they stock. If it's just a little damp and only seeping add some Lucas hub oil to it. Somethimes Lucas will seal the leak back up.
ccoop769

Gary wrote:
Is it leaking from an inside seal or outside seal? Either way any trailer parts house should have the parts or atleast be able to order them for you. Check with Napa Auto Parts, sometimes they stock. If it's just a little damp and only seeping add some Lucas hub oil to it. Somethimes Lucas will seal the leak back up.


I was looking on dexters site, parts look pretty cheap. I dont know where is its leaking form, maybe where the cap meets the hub. U dont see a drip but its moistens and oil is caked on my rims. After its sits for acouple days, theres a small area of wetness you can see at bottom.
Gary

Dexter had some rubber caps go out on alot of axles that didn't have a vent. In the center of the rubber cap there should be a small hole or slice that allows the pressure to vent when it builds. If you don't have the hole in yours take a tooth pick and make one. No vent and the oil will blow seals.
bkdft

WELL I HAVE THE OIL BATHED AXELS.....JUST REPLACED ALL SEALS AND BEARINGS  EVERYTHING IS GOOD TO GO ....UNTIL I SEE OIL LEAKING ON THE OUTTER WHEEL. (WHILE I WAS ON A RUN) UPON INSPECTION I FOUND THE PLASTIC CAP TO BE BROKE AND OF COURSE I DIDNT CARRY A SPARE(NEVER THOUGHT ID NEED ONE). LONG STORY SHORT   ID ADVISE CARRING A SPARE OUTTER CAP OR TWO.

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