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What is Normal Temperature Rating for Trailer Hubs  

Question:

Ive been running your red grease in my 3500# Dexter axles with electric brakes on my 16 ft tandem axle trailer. I decided to check the hub temperature on my last trip with a load. After 2 hours the temp was 115-125 deg F. After 4 hours it was up to 150-160 deg F. Is this normal? The return trip unloaded showed about the same. Ambient was in the low 90s. The temps are pretty close on all four hubs.

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Expert Reply:

Yes, the temperatures you mentioned are normal. If you were getting over 200 degrees that would be a bad sign. But typically if all of the hubs are the same temperature you're good and it's only really an issue if one of the hubs is hotter than others and that axle isn't the sole brake axle.

If you have a tandem axle setup and only one has brakes the one with brakes will get a lot hotter.

expert reply by:
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Jameson C

Jason B.

8/9/2020

How much of a temperature differential is concerning? After pulling into a campsite I checked my hubs. 2 were around 100°, 1 at 108°, and 1 at 120°. I just repacked the bearings before the trip. Should I check the bearings again on the hot hub?

Etrailer Expert

Jon G.

8/20/2020

As long as they aren't losing grease or damaged you should be fine. It could be that you had a little more weight over that one hub as opposed to the other ones, or perhaps the brake for that position was a little more aggressive than the other ones.

Gregory

9/10/2024

Unless one axle has WORKING brakes. Then the hubs on the braked axles will get MUCH hotter. I have a 2010 Bryant 210 on a Shorelander trailer. When I first bought the boat the brakes did not work and all the hubs were about the same temp. After I fixed the brakes the hubs on the braked axles go a lot hotter.

Etrailer Expert

Jameson C.

9/10/2024

@Gregory That is a really good point I hadn't thought of. Thanks for passing that on!

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