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 > Wheel bearing

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bluefishgary

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Posted: 01/09/21 04:10am Link  |  Quote  |  Print  |  Notify Moderator

Trailer wheel bearing oil or grease?
I am converting my trailer to disk brakes and wondering what is best


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JRscooby

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Posted: 01/09/21 04:40am Link  |  Quote  |  Print  |  Notify Moderator

First, seals made for greased hubs will not always hold oil.
For a vehicle that gets a lot of miles, grease will increase fuel consumption.
For years I maintained a storage trailer for a builder. It would set for months between moves. I packed the bearings on it so did not need to worry about leaks/contaminated brake shoes.
Can't see much advantage to oil bath bearings on RV trailer, except bragging rights.

C Schomer

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Posted: 01/09/21 04:56am Link  |  Quote  |  Print  |  Notify Moderator

My Kodiak kit came with oil covers so I tried it. I ran the initial oil for 5 years, no problems, and I changed seals and oil in 2019. After 5 years, I could still see the machine grooves in the rotors... I'm easy on brakes.
The new oil is staying a LOT cleaner, now that my old bearings and the new cups are run-in. I run the bearings at zero to maybe a gnats butt of clearance... I'd prefer zero but some of the locks won't let me set the nut that way. I ran to Phx. last Oct. 75-80 mph and the hubs were 94-98 degrees.
Each hub took 3 oz. until I poked a tiny vent hole in the middle of the rubber plugs and added another oz. with a syringe.
Oil always worked good on my trucks and trailers, when I was in that business. I used Stemco oil covers on the front truck axle and the trailer axles. I use 75w140 syn. Craig

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Second Chance

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Posted: 01/09/21 10:28am Link  |  Quote  |  Print  |  Notify Moderator

I had a conversation with MORryde about this very thing when the naval engineer across from us said that we had "oil caps" on our Kodiac rotors. MORryde was using these caps because the previous caps had a tendency to fall out. They went on to say that the seals and small internal volume of the hubs are not suitable for oil bath configuration. (When I posted this info on the brand-specific forums I'm on, this was confirmed by two automotive engineers. The consensus is that a good, high-temp grease is the best for our RVs.

Rob


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cummins2014

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Posted: 01/09/21 11:07am Link  |  Quote  |  Print  |  Notify Moderator

Second Chance wrote:

I had a conversation with MORryde about this very thing when the naval engineer across from us said that we had "oil caps" on our Kodiac rotors. MORryde was using these caps because the previous caps had a tendency to fall out. They went on to say that the seals and small internal volume of the hubs are not suitable for oil bath configuration. (When I posted this info on the brand-specific forums I'm on, this was confirmed by two automotive engineers. The consensus is that a good, high-temp grease is the best for our RVs.

Rob



Thats good to know, I have the disc brakes, was wondering about a change. I will stick with the grease I use . I have heard guys bragging up the oil bath setup, guess its not what its cracked up to be.

TxGearhead

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Posted: 01/09/21 11:51am Link  |  Quote  |  Print  |  Notify Moderator

My son had oil bath on a saltwater boat trailer. No thanks.
But...I would love to have Vault hubs on the 5th. I have them on my saltwater boat trailer. Bought new 2014. No maintenance yet. Dexter owns Vault, I don't get it.
https://www.dexteraxle.com/docs/default-source/ufp/product-documentation/hub-hub-drum-hub-rotor/flyers/the-vault-hyd-lub-system-(lit-704-00ufp).pdf?sfvrsn=2


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Edd505

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Posted: 01/09/21 05:43pm Link  |  Quote  |  Print  |  Notify Moderator

Wheel Bearing Grease, I'm good with pulling wheels once a year to look at bearings and repacking.
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Second Chance

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Posted: 01/09/21 06:01pm Link  |  Quote  |  Print  |  Notify Moderator

cummins2014 wrote:

Second Chance wrote:

I had a conversation with MORryde about this very thing when the naval engineer across from us said that we had "oil caps" on our Kodiac rotors. MORryde was using these caps because the previous caps had a tendency to fall out. They went on to say that the seals and small internal volume of the hubs are not suitable for oil bath configuration. (When I posted this info on the brand-specific forums I'm on, this was confirmed by two automotive engineers. The consensus is that a good, high-temp grease is the best for our RVs.

Rob



Thats good to know, I have the disc brakes, was wondering about a change. I will stick with the grease I use . I have heard guys bragging up the oil bath setup, guess its not what its cracked up to be.


It is if the internal volume of the axle/hub is large enough and the seals are the correct ones. One of the engineers cited "gallons" of oil for 18-wheeler axles vs. a pint for our RV hubs. That's a lot more oil to absorb and dissipate heat and a lot more space for expansion.

Rob

Diamond c

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Posted: 01/09/21 06:33pm Link  |  Quote  |  Print  |  Notify Moderator

We will never put near the miles on our tat as we will our tow vehicle. I think that grease is fine.

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