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Old 09-23-2016, 06:38 PM   #1
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Possible Bad Wheel Bearing

We just got the Tire Traker 500 system for monitoring air pressures and temps in each of our 4 trailer tires. Got everything installed and working. We took the trailer out of storage and brought it home to start preparations for trips coming up this winter. During the short trip of app. 40 miles, I noticed the temps in 3 of the wheels ranged from 87 to 90 degrees, but the 4th showed around 127. Outside temperature was around 90. Wondering if a bearing may be going out. Any thoughts would be appreciated. Air pressures were all constant and within range. Thanks
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Old 09-23-2016, 07:09 PM   #2
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Take your hand and feel the wheel bearing area after you determine you are at operating temperature. If the hub center feels warm on your suspect wheel, it maybe a bearing. Not sure if you are referencing a MH. If that is the case, make sure you do not have brakes hanging up. Although, that temperature variant isn't indicating failure is eminent in the near term.
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Old 09-23-2016, 07:24 PM   #3
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The wheel bearing is a long ways from the valve stem the sensor is on. Probably won't read a hot bearing. My guess is it's a brake hanging up or a bad sensor...
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Old 09-23-2016, 07:37 PM   #4
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Jack the offender off the ground and give it a good spin, listen for any noise.
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Old 09-24-2016, 02:05 PM   #5
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Maybe you could try swapping the sensors on two tires and see if the suspect wheel still indicates hot.
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Old 09-24-2016, 02:20 PM   #6
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Harbor freight sells a cheap lazor temp gun ,I have one use it when we stop check, tires, wheel centers (for bearing temp) , and brake drums. Not really concerned with accuracy in the numbers but just that they are all close to the same temp. The ray gun will help narrow it down and its cheap Insurance. Get cha one
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Old 09-24-2016, 04:36 PM   #7
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I had a wheel bearing go bad on my trailer. By the time I noticed it was smoking. I'm sure a TPMS would have detected it and alerted me. I now have a TST 507 system with metal valve stems. The metal stems should conduct the heat from the wheels to the cap sensors. I also have the Harbor Freight IR thermometer which agrees with the sensor temps within a degree or two when pointed at the sensors.
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Old 09-24-2016, 05:16 PM   #8
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Are you ready for a bring back? Have the Chinese bearings replaced with American bearings and I haven't packed at all the bearings.
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Old 09-24-2016, 05:36 PM   #9
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Quote:
Originally Posted by spudston View Post
I had a wheel bearing go bad on my trailer. By the time I noticed it was smoking. I'm sure a TPMS would have detected it and alerted me. I now have a TST 507 system with metal valve stems. The metal stems should conduct the heat from the wheels to the cap sensors. I also have the Harbor Freight IR thermometer which agrees with the sensor temps within a degree or two when pointed at the sensors.

I too have the heat detector, but didn't think of using it on the hub. I also have the metal valve stems, which I highly recommend. Makes checking air easier and more accurate. I'm taking the trailer in to our local tire and wheel shop Monday to have them look at bearings and brakes on both axles of our TT. Should be ready to go south this winter. Thanks everyone for input. As always, you all are great assets in figuring these things out. The TMS is the latest item I've gotten that will help our outings become good memories and not bad!
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Old 09-24-2016, 07:02 PM   #10
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We make it a point to hand check each of the hubs when making a rest stop or fuel stop. Note that when you are driving during sunlight, the hubs will always be a few degrees warmer on the sun side of the unit. We also carry a spare set of bearings and packing grease. Fortunately, we have never had to use them.

If you have a failing bearing, there should be more play in that wheel if it jacked up. Loose bearings cause the brake pads on that wheel to drag, thus more heat.
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