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 > Checking on Wheel Bearing Heat

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DogTrainer

Tulsa, Oklahoma

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Posted: 07/29/20 06:24am Link  |  Quote  |  Print  |  Notify Moderator

I was wondering how many of you check your hubs for overheating when you stop and get gas or pit stops.

While driving home from Branson (232 miles total one way) I stopped for gas and two hubs were kind of hot (different axles) but touchable and two were cold. I took the camper yesterday to get the bearings checked. I just had them packed last year and I told the service writer that the technician may have tightened two of them down to tight.

Since repacking last year I have only driven 1200 miles and I don't consider that excessive miles.

I would assume while driving they should all be close to same temperature.


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theoldwizard1

SE MI

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Posted: 07/29/20 06:37am Link  |  Quote  |  Print  |  Notify Moderator

Warm (you can keep your hand on it) is acceptable.

* This post was edited 07/29/20 06:52pm by theoldwizard1 *

ksbowman

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Posted: 07/29/20 06:38am Link  |  Quote  |  Print  |  Notify Moderator

Yes, they should be close although the side receiving the sun will be elevated. I use an infrared temp gun from Harbor Freight and it makes checking temps very easy. They are very reasonable there.

Roger10378

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Posted: 07/29/20 06:48am Link  |  Quote  |  Print  |  Notify Moderator

Another thing that can affect the temperature is brake adjustment. You have just made a stop and if some brakes are tighter than others they will generate more heat.


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lenr

Indianapolis, IN

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Posted: 07/29/20 07:20am Link  |  Quote  |  Print  |  Notify Moderator

X2 on brake adjustment. I once adjusted my brakes after a break in period, and 200 miles down the road one hub was 50 degrees hotter than the other 3. Had the tool with me so laid under the trailer at the rest stop and loosened it slightly. Problem solved. ALKO axle support (back before being bought by Dexter) told me that hubs could run as high as 300 degrees without a problem, although that seems high to me.

Lwiddis

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Posted: 07/29/20 07:31am Link  |  Quote  |  Print  |  Notify Moderator

I touch each hub on every stop’s walk around. Quick, easy.


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DogTrainer

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Posted: 07/29/20 07:35am Link  |  Quote  |  Print  |  Notify Moderator

Yes I think excessive heat (300) would affect bearing failure.

I usually check bearings during stops cause my bladder is 2 hours or less range and typically they stay cool.

please show picture of temp gun you use and is it accurate.

MFL

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Posted: 07/29/20 07:44am Link  |  Quote  |  Print  |  Notify Moderator

The touch method is better than not checking, but a temp gun more accurate. Yes, the sun side will run a little hotter, maybe 10-20 degrees. Lots of variables, including over tightened bearing, or brakes not all adjusted the same. The main thing is uniformity being reasonably close on all hubs. One 50 degrees or more warmer indicated a problem, that needs checking.

btw, the term technician may not describe every guy, with a wrench in his hand. [emoticon]

Jerry





memtb

Wyoming

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Posted: 07/29/20 07:45am Link  |  Quote  |  Print  |  Notify Moderator

Dog Trainer, We carry an IR Gun, which gets used on tires and bearings with each stop for fuel .....often between fuel stops. If we’ve just completed a steep, long climb ( our 5er weighs 20 K) I’ll get a truck rear differential temperature!

Most highways have a pretty good grade/angle to the curb/ditch side.....where the warm bearings on the “downhill” side. I generally get higher temperatures on the tires and bearings on the curb side ( on a 2 lane road). I assume that the weight transfer due to road angle puts additional load on the “downhill” side! memtb

* This post was edited 07/29/20 07:53am by memtb *


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BobsYourUncle

Calgary Alberta Canada

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Posted: 07/29/20 07:53am Link  |  Quote  |  Print  |  Notify Moderator

Another vote for the temp gun.
I carry one at all times.
So simple to point the laser beam at the hubs and read the screen. I use it on tires too, including my inner dually.


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