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 > Hub grease seal.

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Cummins12V98

on the road

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Posted: 03/10/20 02:59pm Link  |  Quote  |  Print  |  Notify Moderator

2015 my DRW was delivered to me with 4,000 miles on it or so. I towed til the next summer then back to MORryde, that added another 4k or so. Later that fall with at least another 4k I raised up the RV and checked the bearing play doing the push/pull on the user edge of the tires. The play was well within spec. So I had a friend spin one tire at a time while I pumped the grease into the EZ Lube ZERK as fast as I could stopping to wipe the old grease off as it came out. I stopped once the fresh grease started coming out.

I did the above because I didn't trust the grease or how well it was greased.

Until a person actually uses the system they really don't know.


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blofgren

Surrey, B.C.

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Posted: 03/10/20 09:12pm Link  |  Quote  |  Print  |  Notify Moderator

The original owner of my boat and boat trailer simply used the EZ lube system instead of repacking the bearings. When I took it apart last year to repack the bearings I found a very brown inner bearing on one side that I had to replace and a TON of old grease throughout the entire hub on each side. What a mess!!! I'll stick with repacking them manually thanks.


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Cummins12V98

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Posted: 03/10/20 09:50pm Link  |  Quote  |  Print  |  Notify Moderator

blofgren wrote:

The original owner of my boat and boat trailer simply used the EZ lube system instead of repacking the bearings. When I took it apart last year to repack the bearings I found a very brown inner bearing on one side that I had to replace and a TON of old grease throughout the entire hub on each side. What a mess!!! I'll stick with repacking them manually thanks.


Are you talking hearing buddy instead of EZ Lube?

trail-explorer

NM

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Posted: 03/11/20 01:57pm Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

Stop pumping and wipe off excess when fresh grease appears.


If you start seeing fresh grease appear out the front of the hub, the hub is overfilled with grease, and has likely already blown out the inner seal.

I've dismantled numerous hubs that use the EZ lube system. The majority of the grease pumped in through the zerk fitting goes BEHIND the inner bearing, and blows out the seal.


Bob

fj12ryder

Platte City, MO

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Posted: 03/11/20 02:57pm Link  |  Quote  |  Print  |  Notify Moderator

trail-explorer wrote:

Cummins12V98 wrote:

Stop pumping and wipe off excess when fresh grease appears.


If you start seeing fresh grease appear out the front of the hub, the hub is overfilled with grease, and has likely already blown out the inner seal.

I've dismantled numerous hubs that use the EZ lube system. The majority of the grease pumped in through the zerk fitting goes BEHIND the inner bearing, and blows out the seal.
Wrong. Grease is supposed to come out the front when the EZ Lube zerk is used. It's not overfilled, that's how it works. If you think it's overfilled, it would call into question the accuracy of the rest of your statements too. I have the EZ Lube system, have used it, and know how it's supposed to work.


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Cummins12V98

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Posted: 03/11/20 03:24pm Link  |  Quote  |  Print  |  Notify Moderator

trail-explorer wrote:

Cummins12V98 wrote:

Stop pumping and wipe off excess when fresh grease appears.


If you start seeing fresh grease appear out the front of the hub, the hub is overfilled with grease, and has likely already blown out the inner seal.

I've dismantled numerous hubs that use the EZ lube system. The majority of the grease pumped in through the zerk fitting goes BEHIND the inner bearing, and blows out the seal.


SIMPLY NOT TRUE!!!! The seal is designed to tighten against spindly with the grease entering. If you use quality synthetic grease with a grease gun the seal will hold just fine! If you are using Chinese POS seals well that's on you!

The system is designed to fill every cavity and push old grease to the front plain and simple.

Follow the arrows, ALL grease enters behind the rear bearings.

[image]

Cummins12V98

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Posted: 03/11/20 03:32pm Link  |  Quote  |  Print  |  Notify Moderator

Personally think the EZ Lube system is great, BUT this is better. "Oil Bath" US Made National seal with "AS568-230 BV75 Fluorocarbon FKM O-Rings 75 Durometer Brown" "O" from theoringstore.com behind front cap make for a top quality no leak system. These parts are for a Kodiak 8k disk system.

[image]
[image]

Ron3rd

Upland, CA USA

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Posted: 03/11/20 04:07pm Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

trail-explorer wrote:

Cummins12V98 wrote:

Stop pumping and wipe off excess when fresh grease appears.


If you start seeing fresh grease appear out the front of the hub, the hub is overfilled with grease, and has likely already blown out the inner seal.

I've dismantled numerous hubs that use the EZ lube system. The majority of the grease pumped in through the zerk fitting goes BEHIND the inner bearing, and blows out the seal.
Wrong. Grease is supposed to come out the front when the EZ Lube zerk is used. It's not overfilled, that's how it works. If you think it's overfilled, it would call into question the accuracy of the rest of your statements too. I have the EZ Lube system, have used it, and know how it's supposed to work.


X2, have had no problems with the Ez Lube but it needs to be done correctly. As to the poster who posted above about the problems with the boat trailers he worked on; those are Bearing Buddy systems. Nothing close to the Ez Lube system.


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Grit dog

Black Diamond, WA

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Posted: 03/11/20 04:50pm Link  |  Quote  |  Print  |  Notify Moderator

12V, yes that is how they are designed, but if you've greased many of them, you know that many times the path of least resistance is out the rear seal. Either due to blockage, cold grease, old seal, weak spring, whatever. Something to keep an eye on.
You know how it's "supposed" to work. Other's just dismiss it as being a bad design with zero understanding and jump to uninformed conclusions.

I have a love/hate relationship with oil bath hubs. Haven't had one bleed out on the road yet, but a couple weepers that had me guessing if I was going to make it home with some oil left in the hub.

Had one start leaking on the boat trailer, over 10 years old, so replaced all 4 seals. Bought "quality" double lip seals. 1 of them didn't make it back out of the garage, was weeping just sitting there. Replaced it quick with an Autozone Chinesium special to get going. 3 years later that one is still holding.
I'm not a fan really, except "re-packing" them is easy. Drain and fill, no mess. Not keen on something that can leave me stranded though. Grease seal leaks or goes bye bye, you can drive a long ways without damage. Oil seal goes, you're done lik edinner.


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BruceMc

Oregon - Willamette Valley

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Posted: 03/11/20 05:57pm Link  |  Quote  |  Print  |  Notify Moderator

Correct - two different systems, for two different uses.
Bearing Buddy systems are designed for boat trailers. The purpose is to keep the water out of the bearings. While driving to the boat ramp, the bearings will heat some, then when immersed in cold water, will cool rapidly. If they are conventional bearings, water will be drawn into the hub. All will be fine, until, on the way home the bearing will overheat as it now contains water... and there goes the wheel(s).
The bearing buddy has a spring & cavity for extra grease; when immersed, it'll contract, but no water will be pulled into the hub.

That all said, I have bearing buddy units on my boat trailer, and have been satisfied with the performance. Next, I've had conventional bearings on all the trailers I have/had over the years, and always installed a new seal & hand packed them after acquisition, then ran for years afterward with nary an issue. I check 'em every 3-5 years. All is good.


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