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Old 04-30-2014, 03:26 PM   #11
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Permatex is a brand name. What Permatex product are you referring to? They make, among many other things, Aviation Form-A-Gasket, a blue RTV silicone gasket sealant, anti-seize compounds, threadlockers, hand cleaner, etc.
I know they make tons of products. But if you go to an auto supply house and ask for a tube of permatex you will get a small blue tube of gasket maker/sealer.
That's what I am talking about.
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Old 04-30-2014, 03:43 PM   #12
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I did some more surfing and found that the Permatex PermaShield seems to be what is used for the dust cups. This is probably what elder is talking about.
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Old 04-30-2014, 04:34 PM   #13
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So when you go to the auto parts store and ask for Permatex you will be handed this: Permatex Ultra Blue Multipurpose RTV Silicone Gasket Maker #81724

Just hope and pray they don't hand you a jug of citrus hand cleaner!!
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Old 05-01-2014, 07:45 AM   #14
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So when you go to the auto parts store and ask for Permatex you will be handed this: Permatex Ultra Blue Multipurpose RTV Silicone Gasket Maker #81724

Just hope and pray they don't hand you a jug of citrus hand cleaner!!
Well the hand cleaner would be needed after doing the bearing job
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Old 05-01-2014, 07:47 AM   #15
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I did some more surfing and found that the Permatex PermaShield seems to be what is used for the dust cups. This is probably what elder is talking about.
Yeah, was not actually sure of the exact product but I did know it's common pratice with some hubs.

Also, notice how many trailers are missing dust caps as you travel down the road.
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Old 05-01-2014, 08:15 AM   #16
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Dust cap coming off is a sign that the axle nut is too loose, try tightening the nut till the wheel no longer turns, than back off half a turn. Check that the wheel spins freely with no
wobble.
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Old 05-01-2014, 09:10 AM   #17
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Dust cap coming off is a sign that the axle nut is too loose, try tightening the nut till the wheel no longer turns, than back off half a turn. Check that the wheel spins freely with no
wobble.
A half-turn sounds a bit much. The Dexter site recommends tightening to 50ft#, loosening and retighten by hand.
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Old 05-01-2014, 09:49 AM   #18
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Dexter sells at least 3 (sure there are more) hub types common to Rv's and they each have different instructions on repair and maintenance. Std hubs, easy lube and never lube hubs require different proceduers be followed.
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Old 05-01-2014, 10:48 AM   #19
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IMHO, it's a touchy feely thing. Set the bearings by tightening, than back-off so the wheel spins and no play. It's the play, moving in and out on the spindle that works the dust cap out, a little at a time. Try it, it costs nothing. Also some times it's the bearings going that will work a cap off, but in this case the bearing would have gone by now, again IMHO.
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Old 05-01-2014, 12:00 PM   #20
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IMHO, it's a touchy feely thing. Set the bearings by tightening, than back-off so the wheel spins and no play. It's the play, moving in and out on the spindle that works the dust cap out, a little at a time. Try it, it costs nothing. Also some times it's the bearings going that will work a cap off, but in this case the bearing would have gone by now, again IMHO.
Never lube bearings must have some (slight) end play. I don't know how common they are on RV's but they are set up different than traditional open bearings. Also castellation location can dictate the ammount of end play in any wheel bearing. Some axles have more than one hole to allow for finer tuning of the end play, others do not. In some cases a perfect feel is between castellations, here you back off until the cotter pin goes in the hole end play or not.

Out of 4 wheels on a camper you will find one or two that adjust up slightly looser than the others. The cotter pin locations are in control here to some degree.

Perfect is: not to loose but never tight.
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