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Old 09-27-2018, 02:21 PM   #1
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8K Axles

Grease zerks or oil bath bearings?
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Old 09-27-2018, 03:15 PM   #2
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Mine have Zerks
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Old 09-27-2018, 03:42 PM   #3
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I have 7k axles with zerks, but I WILL NOT/WOULD NOT pump grease through those zerks if you have drum brakes, hand pack annually. With the drum brakes there's too great a possibility of contaminating the brakes with grease if the grease seals fail while pumping into those zerks. If you have disc brakes it's less likely to be a problem, but still recommend hand packing annually to inspect all the parts.
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Old 09-27-2018, 11:51 PM   #4
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oil bath are cool!
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Old 09-28-2018, 12:15 AM   #5
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OK, I'm no expert on Oil Bath vs Grease, so while at the Summer Rally I asked Gary Wheeler of MORryde his opinion:
He said for Over the Road Trucks, Oil was great because they're moving all the time, while RV may sit for months at a time without moving and Oil can tend to drain off the upper part of the bearings, so he recommends Grease for RVs.
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Old 09-28-2018, 02:38 PM   #6
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I guess the counter argument to that would be that all Freightliner and Spartan chassis motorhomes have oil bath hubs on the front axles and tag axles and they sit in the same storage lots, garages, and long term RV lots as other RVs, so I'm not sharing Gary Wheelers opinion.
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Old 09-28-2018, 04:12 PM   #7
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I like/trust my old Timken grease bearings . . . Was somewhat interested in the oil bath, but they are really not for me...

After years of driving big trucks and having grease on the wheels all the time, NO THANK YOU . .
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Old 09-28-2018, 04:42 PM   #8
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My OEM Redwood disk brakes were Kodiak rotors and came with the clear plastic threaded hub covers and for a moment I was pretty excited to think they were oil filled, but there were just grease.

The advantages to oil filled hubs are no more packing the bearing, no more worries about greasing your brakes. Maintaining the oil is as easy as popping a rubber cap and looking at the oil level.
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Old 09-28-2018, 05:29 PM   #9
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the real issue with oil bath is if the trailer site the seal surface can get rusty and cause it to leak. if you move the trailer all the time I would say it a good idea. As for zerk fitting and grease. 3 pumps a fresh grease once a year or you will be sorry. your springs could use a pump every month if your moveing it all the time
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Old 09-28-2018, 10:04 PM   #10
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Quote:
Originally Posted by XCMARK View Post
the real issue with oil bath is if the trailer site the seal surface can get rusty and cause it to leak. if you move the trailer all the time I would say it a good idea. As for zerk fitting and grease. 3 pumps a fresh grease once a year or you will be sorry. your springs could use a pump every month if your moveing it all the time
I grease all the suspension fittings several times a year & hand pack annually & inspecting the bearings, races, seals & brakes which can't be done by pumping grease into those zerks. From what I saw on mine the 1st 5-6k miles of owning & all 4 drums slap full of grease & I didn't pump any into them, I'd be sorry if I did give it 3 pumps once a year.
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