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Old 06-17-2012, 07:03 PM   #1
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How hot should bearings run

I have a 2009 flagstaff 26rls and just had the bearings & races replaced & repacked and we took a short trip this weekend so i checked the hubs just by touch and they seemed to hot getting a temp. gun to check next time out how hot should they be?
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Old 06-17-2012, 07:32 PM   #2
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Originally Posted by feerobk View Post
I have a 2009 flagstaff 26rls and just had the bearings & races replaced & repacked and we took a short trip this weekend so i checked the hubs just by touch and they seemed to hot getting a temp. gun to check next time out how hot should they be?
If the hub is too hot to touch, it is too hot, period. It should feel very warm. I am a working man with pretty tough hands and I use the 5 count method. Grab the cast part of the hub, not the dust cap, count to five. If you can't do that it is too hot.
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Old 06-17-2012, 07:37 PM   #3
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Originally Posted by feerobk View Post
I have a 2009 flagstaff 26rls and just had the bearings & races replaced & repacked and we took a short trip this weekend so i checked the hubs just by touch and they seemed to hot getting a temp. gun to check next time out how hot should they be?
My hubs are cool to cold to the touch after 5 hours at 65 MPH.

It has been my experience that most RV techs have no idea what an UltraLube hub is. They hand pack the bearings like my great grandpa did when bearings lasted 20,000 miles. Most also overtighten the hub nuts.

Ultra-Lube Axles and Bearings Procedures

104 posts of why that is so.
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Old 06-17-2012, 07:39 PM   #4
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Can't always go by that.
What if he was on the brakes pretty heavy just before stopping?
That would heat up the hubs tremendously!
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Old 06-17-2012, 07:42 PM   #5
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Can't always go by that.
What if he was on the brakes pretty heavy just before stopping?
That would heat up the hubs tremendously!
I don't think he was worried about hot hubs due to a panic stop.
I have been wrong before though.
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Old 06-17-2012, 08:04 PM   #6
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No hard stop before i checked the hub I don't think I could have done a 5 count on one of they all the hubs were what I would call very warm run only less than a hour 55 or less if the hub nuts are to tight will that make them run hot if the nuts are to tight if i back them off a hole should they move when i push and pull on the wheel?
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Old 06-17-2012, 08:06 PM   #7
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Old 06-17-2012, 08:06 PM   #8
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I meant to say should the hub move if i push pull on the tire
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Old 06-17-2012, 08:07 PM   #9
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Here is the procedure for the wheel nuts.
Attached Files
File Type: pdf 0132-bearing-inspection-maintenance.pdf (112.1 KB, 314 views)
File Type: pdf Bearing Repack and Brake adjustment.pdf (549.5 KB, 134 views)
File Type: pdf Trailer Axle Lube ADD.pdf (575.7 KB, 80 views)
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Old 06-17-2012, 08:08 PM   #10
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Can't believe HERK said that!
Hard to believe, ain't it.

It is the "Pierre the Bridgebuilder" problem.
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