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Old 08-20-2016, 06:12 PM   #1
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Hub Temperature

I towed our 2016 Whitehawk yesterday for about 122 miles for 3 hours in a 90 degree weather on a stop n go traffic. I was just cruising at 60mph on the last 5 miles with a little bit of descent here and there.

While waiting for my wife to check us in, i decided to check the hub temperature with a laser temp gun. The 2 front hubs (driver and passenger) of the tandem axle read about 130 degrees each. However, both back hubs (driver and passenger) read about 180 degrees. This is after the trailer has been on parked for about 5 minutes.

Are those temps normal? I don't have yet a baseline temp of the hubs and should have checked the hub temps every time we tow.
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Old 08-20-2016, 06:40 PM   #2
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Seems high to me from my recollection when I used one of those. Did you lay your hand on one of them?
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Old 08-20-2016, 07:06 PM   #3
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This is from a boat trailer site, but still applies:

As long as the grease isn't melting you are ok. Expect non brake temps to run up to around 120. If you have brakes here are the numbers
180-200 normal
250 o-rings fail in covers
300 seals fail
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Old 08-20-2016, 07:23 PM   #4
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Are you traveling level, because of the difference in temperature?
Seals are OK from -40 to 210 F (short period up to 250 F)
Bearings are OK up to 250 F
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Old 08-21-2016, 06:18 AM   #5
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Pointing the laser right where the bearings are I get between 112-122. One of my bearings always seems to be 5 to 8 degrees warmer than the rest. I just did 1800 miles a couple weeks ago and they seem to stay right around that range.
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Old 08-21-2016, 08:02 AM   #6
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Just a little info concerning Laser heat guns to get an accurate reading do not point at chrome surfaces.

If you must put a piece of black tape on the shiny surface to get accurate readings.

I picked up this info from our Engineers at work using laser heat guns.

I figure they should know but then maybe not? Use this info accordingly
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Old 08-21-2016, 08:58 AM   #7
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Originally Posted by ALJO View Post
Are you traveling level, because of the difference in temperature?
Seals are OK from -40 to 210 F (short period up to 250 F)
Bearings are OK up to 250 F
Yep pretty much level when parked and hitched up.
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Old 08-21-2016, 09:00 AM   #8
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Originally Posted by Bigmoo315 View Post
Pointing the laser right where the bearings are I get between 112-122. One of my bearings always seems to be 5 to 8 degrees warmer than the rest. I just did 1800 miles a couple weeks ago and they seem to stay right around that range.
The dot is pointed at the exposed portion of the hub in between the spokes of the rim.
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Old 08-21-2016, 11:52 AM   #9
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In my opinion, you aren't even (weight-wise). Seems like you have more weight towards the back of the trailer causing more friction when the rear tires are spinning. Even so, I don't think it's an issue.
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Old 08-21-2016, 12:15 PM   #10
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In addition to the temperature, I am also as much concerned that all four hubs are near the same temp.

That tells you a lot about the overall status and as long as you point the laser at the same spot, the chrome should not affect anything but the actual temp.
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