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Old 08-22-2019, 02:14 PM   #1
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Small cap at end of metal wheel hud

Hey what happen as I was typing lost my message so here goes again.

How does one remove the small round cap on the end of the metal wheel hub? Need to grease the wheel bearing on the Dexter axle. I asume its made to remove as the cap has a small slot the size of a small screwdriver ?? Have attempted to remove the cap only to dent the wheel hub.Please don't tell me one must remove the tire to grease the fitting .

Would appreciate help
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Old 08-23-2019, 06:26 AM   #2
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OK, I won't.

Just note that the correct procedure is to remove the wheel and spin the hub while greasing the Zerk fitting. That way you are sure that all the rollers in the rear bearing get fresh grease.

The center piece does clip into the center wheel cover. You pull, not pry the center piece out. A paint can lid tool or hooked pick might work better than prying with a screw driver.
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Old 08-23-2019, 06:37 AM   #3
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Large channel locks pull out while working it up and down.
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Old 08-23-2019, 08:30 AM   #4
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If you choose to grease through the cap, all that dirty grease pushed out of the bearings will remain inside the trim cap and slowly sling out all over your wheels over time.
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Old 08-23-2019, 01:32 PM   #5
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I used to own a tire & brake shop for 30+ years and I've seen many travel trailer & boat trailer brakes ruined over the years by people that grease their wheel bearings every year with a grease gun through their hubs. Just remember that the old grease has to go somewhere and too much grease just gets forced out through the grease seal which ends up on the brakes causing brake failure at that wheel. It is much better to visually inspect the bearings for grease than take the lazy way out of pumping grease into the hub every 6 months or year.
Grease doesn't evaporate from inside the hubs, it just gets dirtier from moisture contamination and heat / age breakdown. Best to manually wipe down the hub & bearings to get the old grease & dirt out and then repack them with new grease. If a person wanted to do this one year, then add some grease with a grease gun the next year then repack, etc, that would be fine. Just don't keep adding grease year after year.
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Old 08-23-2019, 02:03 PM   #6
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All you need do is to remove the rubber cap and the grease zerk will be right there. With the wheel jacked up spin it while pumping grease watching for the old grease to be pushed out.
You do not need to remove the metal cap on the wheel hub.
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Old 08-23-2019, 02:40 PM   #7
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I have the same chrome plated hub cover, mine has a plug in the center. Remove that plug, then remove the rubber plug on the hub itself. While rotating the wheel assembly, pump grease slowly into bearing via grease zerk fitting. When old grease begins to build up, wipe it off, then pump more grease in, repeat this until you see new grease coming out. Nothing is gained by removing the wheel & tire on my axles.
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Old 08-23-2019, 04:10 PM   #8
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Quote:
Originally Posted by Sbosserman View Post
I used to own a tire & brake shop for 30+ years and I've seen many travel trailer & boat trailer brakes ruined over the years by people that grease their wheel bearings every year with a grease gun through their hubs. Just remember that the old grease has to go somewhere and too much grease just gets forced out through the grease seal which ends up on the brakes causing brake failure at that wheel. It is much better to visually inspect the bearings for grease than take the lazy way out of pumping grease into the hub every 6 months or year.
Grease doesn't evaporate from inside the hubs, it just gets dirtier from moisture contamination and heat / age breakdown. Best to manually wipe down the hub & bearings to get the old grease & dirt out and then repack them with new grease. If a person wanted to do this one year, then add some grease with a grease gun the next year then repack, etc, that would be fine. Just don't keep adding grease year after year.
The attached graphic shows how the EZ-Lube axle Zerk fittings work. Properly done (Instructions attached), the grease should never get past the rear axle lip seal.
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File Type: pdf Dexter Bearings and Repack instructions.pdf (158.7 KB, 41 views)
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Old 08-25-2019, 12:18 PM   #9
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Thanks for all the info.Lifting the wheel off ground is always interesting.FR nor Lippert provide instructions.Ive spoken to both with little luck. Back to the cap Ill follow your ideas/instructions
THANKS
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Old 08-25-2019, 12:30 PM   #10
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"The small round cap on the end of the metal wheel hub" is called a hub cap or dust cap and is removed with hub cap/dust cap pliers.

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Old 08-25-2019, 12:56 PM   #11
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Quote:
Originally Posted by Crowman View Post
Thanks for all the info.Lifting the wheel off ground is always interesting.FR nor Lippert provide instructions.Ive spoken to both with little luck. Back to the cap Ill follow your ideas/instructions
THANKS
I always jack mine up with a bottle jack. Aaand this can always get into more discussion about how, why, when and where.
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