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08-26-2022, 02:46 PM #11
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08-26-2022, 03:01 PM #12
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The maintenance would not be more costly - just messier.
There's a big difference between automotive bearings carrying 7 - 8K lb. vehicles and RV bearings carrying 13 - 23K trailers. There are some bearings called Nev-R-Lube that are sealed bearings for RV and trailer applications. They have a significantly higher failure rate than good quality Timken bearings with proper maintenance. MORryde offered them for a while but had too many people returning to have them replaced with Timkens because of failures.
RobU.S. Army Retired
2012 F350 DRW CC LB Lariat PS 6.7
2020 Solitude 310GK-R, MORryde IS, disc brakes,
Sailun LRG tires, solar, DP windows, W/D
(Previously in a Reflection 337RLS)
Full time since 08/2015
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08-26-2022, 04:28 PM #13
There is such a thing. My 2010 Sabre had them. I lost a wheel when one failed. The problem with the sealed bearing RV hubs is that the inner and outer bearings ar too close together, with no space between then like standard bearings have. They just cannot take much sideways force setup that way. Lippert discontinued theirs, but I believe Dexter (same units as far as I can tell) is still making theirs.
2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
800AH BattleBorn Batteries No campgrounds 100% boondocking
2020 Silverado High Country 3500 dually crewcab Duramax Allison
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08-26-2022, 04:40 PM #14
Dexter only has one caution on oil bath: That the upper rollers can become dry in long term storage, and subject to corrosion.
I am not that concerned about that in Phoenix, plus my coach doesn't sit much.
I think there is enough volume inside the hubs. There have been many reports that it takes almost an entire tube of grease to fill the cavity when using the EZ lubes for the first time.... And those reports are generally for 3500# axles. My 8000# axles are much larger2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
800AH BattleBorn Batteries No campgrounds 100% boondocking
2020 Silverado High Country 3500 dually crewcab Duramax Allison
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08-26-2022, 04:53 PM #15
When I was looking over the Dexter site, I noticed that there was no service interval listed for oil bath bearings.
Etrailer states that all that is needed is a look to see if the oil level is correct, and that it does not look milky IOW, unless something is going wrong, they are maintenence free.
I did notice that Etrailer does sell oil bath kits for axles as small as 3500#....But I am pretty sure I have read in the past that Dexter only recommends it on 8K and up.Last edited by huntindog; 08-26-2022 at 04:57 PM.
2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
800AH BattleBorn Batteries No campgrounds 100% boondocking
2020 Silverado High Country 3500 dually crewcab Duramax Allison
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08-26-2022, 05:15 PM #16
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The MORRyde guy isn’t quite right on that. The drive axles yes….there are gallons of oil in the differential and a shallow amount that goes out to the outside bearings on the drive axles of a semi tractor. All the other wheels on a semi, including the fronts, are a hub and outside metal cap with clear sight window. The oil in those is only about an inch deep (if that), and maybe totals half a quart of 80W-90 gear lube. A set of tandems fully loaded is 36000lb, so 9000 per hub. A 15k lb GVWR 310GK would put 3000lb on each hub, after subtracting maybe 3k of pin weight. The RV hub volume is less, volume of oil will be less, weight carried is approx 1/3. Relationally, I can’t see there being a reason for a significant pressure difference.
We are going in January to MORRyde for IS…I’ll talk to them about oil bath. It would be nice to do it while they are switching everything over.
@pilotpip I’d get the disc brakes and axle upgrade. I had the brake controller set a little hot the first time I put the brakes on, and thought I was going to rip the hitch out of the back of the truck! They are fantastic.Larry and JoAnna
‘23 Chevy 3500HD CCLB DRW High Country 6.6L Diesel, ‘22 Solitude 310GK-R, Hensley BD5
MORRyde 8k IS, QD8000 Genny, Dual 5kVA Quattros
Dual SOK 48V 100ah Server Rack Batts (10kWHr)
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08-26-2022, 06:27 PM #17
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Just a quick note - the higher GVWR with the 8Ks is not a given when installed at the factory. I called GD before we ordered and was told that they had no policy which automatically increased the GVWR as management has been back and forth on this one. I was told to insure the dealer put the 18K (in my case) GVWR request clearly on the order sheet next to 8K option they sent to GD. That worked for me.
I don't know if they have changed that policy but that was when we ordered last Nov.Robin & John
2020 Ram 3500 LB SRW 4WD Crew Laramie 6.7HO Aisin, 55gal Titan 4014 payload
2022 Solitude 310GK-R - Dual pane, factory solar & Onan, 8K axles with discs, 18K GVWR, W/D, Heat Pump, Goosebox, Battleborn
2023 stays
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08-26-2022, 07:39 PM #18
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08-26-2022, 08:24 PM #19
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Interesting, I ordered mine in January of 2021, which was the first time they were offering the 8K axle option on the 320G. I had no idea that it would increase the GVWR, I wanted the axle margin, and disc brakes. I found out when mine was delivered and I looked at the weight sheet for the trailer.
2023 Chevy 3500HD CC SB 4x4 Dmax
2021 GD 320G with 8K axles
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08-27-2022, 04:56 PM #20
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@Second Chance mentioned that in an early question on 8K axles. When I called GD, it was not a given upgrade on the placard unless the dealer specifically requested it.
Robin & John
2020 Ram 3500 LB SRW 4WD Crew Laramie 6.7HO Aisin, 55gal Titan 4014 payload
2022 Solitude 310GK-R - Dual pane, factory solar & Onan, 8K axles with discs, 18K GVWR, W/D, Heat Pump, Goosebox, Battleborn
2023 stays
Too windy?
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