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 > Checking on Wheel Bearing Heat

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HappyKayakers

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Posted: 07/29/20 01:17pm Link  |  Quote  |  Print  |  Notify Moderator

ksbowman wrote:

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.


This ^^^^^^^^


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Allworth

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Posted: 07/29/20 01:48pm Link  |  Quote  |  Print  |  Notify Moderator

I walk around the trailer with a HF gun every time we stop. Infra red on the hubs and visual on the treads, hatches, doors, and any fluids that might be falling out..


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Posted: 07/29/20 02:31pm Link  |  Quote  |  Print  |  Notify Moderator

Just keep in mind that a temperature gun is not a good tool to diagnose bearing condition. The bearing can be in the beginning stages of failure and the temperature may not be elevated much. Ask me how I know.

[image]

This grease was new and red at the beginning of a long trip, temperatures of both the TPMS and heat gun showed normal. Diagnosis; cheap Chinese bearing was manufactured poorly.





Mike134

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Posted: 07/29/20 03:23pm Link  |  Quote  |  Print  |  Notify Moderator

Lynnmor wrote:

Just keep in mind that a temperature gun is not a good tool to diagnose bearing condition. The bearing can be in the beginning stages of failure and the temperature may not be elevated much. Ask me how I know.

[image]

This grease was new and red at the beginning of a long trip, temperatures of both the TPMS and heat gun showed normal. Diagnosis; cheap Chinese bearing was manufactured poorly.

I don't see anything wrong in this view. Color change to the grease is normal


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azdryheat

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Posted: 07/29/20 04:32pm Link  |  Quote  |  Print  |  Notify Moderator

I do my own repacking so I know it's been done correctly and that the bearings haven't been over tightened. Periodically (when I think of it), I'll check how the tires and hubs feel, which confirm I did the repack correctly.


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Thermoguy

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Posted: 07/29/20 05:33pm Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

Oil bath on my 8k MORryde axles and they run nice and cool in all temps. Check hubs and tires at each stop. Running near capacity on the GY "H" tires with ambient in the low 80's.

[image]
[image]



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Edd505

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Posted: 07/29/20 05:42pm Link  |  Quote  |  Print  |  Notify Moderator

Commercial drivers at thought to hold you hand at the hub and if you can touch them your good to go. Those guys drive 10-12 thousand miles a MONTH so if it's OK for them why all the heat guns stuff? Most RVs are weekenders and a couple weeks vacation way less than a week on a commercial truck.


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Lynnmor

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Posted: 07/29/20 06:22pm Link  |  Quote  |  Print  |  Notify Moderator

Mike134 wrote:


I don't see anything wrong in this view. Color change to the grease is normal


The grease contains metal fines that turned it gray. Some of the other bearings with the same service had red grease. You are wrong, the bad bearing had a ridge that wore away and that is the metal that wore off.

pcm1959

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Posted: 07/29/20 07:42pm Link  |  Quote  |  Print  |  Notify Moderator

delwhjr wrote:

I use the TST TPMS and it is reliable. I am also a creature of habit and still check with IR thermometer as part of my walk around at each stop. A few extra seconds for safety is not a bad thing.


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JIMNLIN

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Posted: 07/29/20 07:56pm Link  |  Quote  |  Print  |  Notify Moderator

Quote:

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

Running a east/west interstate like I-44 or I-40 in our area where we have lots of stiff constant north/south side winds will heat the tires/bearings on one side and the other can run cool. I've seen my 16" LT E tires at 80 psi and cool on the trailers windward side ...but on the other side psi went to 90-92 psi with hot tire and bearing temps on long daily runs.


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