Bearing Temps

I measured the temp of the hubs with an IR monitor when we pulled in after pulling 350miles today. Both front trailer tire hubs were ~105degF, while both rear tire hubs were 125-130degF. I suspect it's loading as there's 50gal of water ~5' aft of the rear axle. Should I be concerned for the bearings? I don't think I overtightened them, bet didn't expect to see that much temp variance. This is the first time I've checked temps so I don't have a reference.

Thanks in advance for any comments.
Ron

I would make sure the hotter axle brakes are not dragging; that creates extra heat. I have never seen that much difference in axle temps at the bearings so I guess I would look to see if there is anything else that could be causing the heat difference. 130 is a little warm if you did not do any braking prior, but certainly not excessive. 105 is just about perfect. On a 85 degree day mine typically run around 115. In some ways you are in the ballpark, one a little lower and one a little higher. It could be loading and it could be brakes dragging a little. It is very easy to check to see if bearings are too tight and it is also easy to make sure the brakes are not dragging. If both are correct, I would not worry about it unless the temps start to go substantially up.

If its a tandem axle trailer, there won't be any difference in weights on the axles, no matter how its loaded.

Take it across the scales, weigh each axle, and you might reconsider your statement. Even with equalizers on the axles the axles do not carry equal weight. And it is not just loading, raising or lowering the tongue of the trailer can change the weight on each axle. And it is not just the difference in weight between each axle, but the weight difference on each side of an axle.

Old-Biscuit wrote:
Bet if you went across a set of scales (loaded as you were) you will find a big difference in axle weights on trailer.

I've seen those temps but not on a cool day.

Check your brake adjustments also

If its a tandem axle trailer, there won't be any difference in weights on the axles, no matter how its loaded.

Temps sound fine. When bearings aren't right they're too hot to touch.

Do you have 4 wheel brakes on the trailer?
BTC

Those were our hub temps on a hot (90-degree) day recently, after a bearing repack. In cooler (60s/70s) weather our hub temps were 95-105. Tire temps were fairly similar, but of course warmer on the sunny side of the TT.

Bet if you went across a set of scales (loaded as you were) you will find a big difference in axle weights on trailer.

I've seen those temps but not on a cool day.

Check your brake adjustments also

what was the tire temps? on my mh the rear tires on my tag also run at a higher temp then the drive. and that will make the hubs run warmer, also not as much air for cooling the rear tire & hub.