Ranger oil flooded trailer hubs

Does anyone know how much oil each bearing hub holds for the Ranger Cool hubs? I plan to change the oil in mine and don’t know how much oil to buy. I’m told they use 50WT Valvoline Racing Oil.

I thought they didn’t need to be changed?

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I thought they didn’t need to be changed?

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No seal lasts forever, constantly submerging the unit, its bound to fail some time and let water in. also as bearings spin they wear and that is metal coming off and then staying in the oil causing more wear. Granted it is a great system, much better than grease but it should still be maintained to prevent unnecissary wear. Fully stand behing ya changing them but sorry i have no info.

It has been a few years since any service and the sight windows get clowdy so it is hard to tell what I have in there. The oil isn’t that exspensive so I’ll feel better if I know there is fresh lubricant on the bearings. It is easy to check for wheel play at the same time to be sure more work isn’t needed.

I’ve had a couple Rangers now and I’ve asked literlly a dozen people, including a couple dealers and they’ve said the oil doens’t need to be changed or can’t be changed? Maybe they were all wrong? If they were wrong how do you do it?

I agree, I would think at some point the oil would break down and need to be changed?

Jack up the trailer, jack stands making sure the trialer stays level. Remove the tires. There is a allen head right on the hub, remove it, spin the hub so the drain hole is at the bottom. They take a LONG time to completely drain, so get both plugs removed and go have a beer or 3.

Yes, 50wt racing oil is to be used. Very hard to refill through that little hole!! Best I came up with was a turkey injector, works quite well. I took one and cut the tip off as it had 2 holes. Fill to between the lines making sure to give the bubbles a chance to rise as you get close to “full”. Get some RTV sealant/gasket maker, put a light bead around the threads and reinstall. Not sure exactly how much they take?? Since my sightglass is clear/clean I can see inside.

I do mine every fall, might be overkill but I do it anyway, as long as I’m doing engine oil, lower unit and other maint…why not? The oil is cheap and the maint. is easy.

BIRDDOG

I do the same as BirdDog. Change once a year in the fall. Those instructions are right on.

-J.

I agree totaly with birddog on the process. Only suggestion would be to have a 6 pack available tahther than a couple because it takes forever to drain them

Now I’ve never seen the hubs your talking about so I don’t know how big the hole is. What about putting a coffee stirrer or some other small straw in the hole while it’s draining so the air can come in as the oil goes out. It there already is a vent in the hub never mind. Just a thought for you guys to try if you haven’t already.

Well I changed the oil today and am really glad I did. First my wheel lugs were so tight that I broke a socket and had to drive to a tire shop to have them broke loose for me. If I had a flat on the road before today I never would have been able to change the tire. Next, when I drained the oil it looked like something that came out of a sewer. Now I know there is good oil in the hubs and plan to change again before storage. Not knowing how much oil it took I got four quarts. It took less than one to fill both hubs so I probably have a lifetime supply.