Headhunter Posted February 4, 2016 Report Share Posted February 4, 2016 I got a nifty electronic temp sensor for northern tool and thought I would check the temps of my trailer hubs and found the following after about an hour of towing at about 50mph. The two front hubs were 110 degrees The left rear was 128 and the right rear 138. So, my question is What should they be? Thanks in advance for the good info. Link to comment Share on other sites More sharing options...
justfish Posted February 4, 2016 Report Share Posted February 4, 2016 From everything I've ever read on it they should be between 110 and 138 Link to comment Share on other sites More sharing options...
Grant Posted February 4, 2016 Report Share Posted February 4, 2016 Mine are usually in that range. I also see a temperature variance from side to side. So far the higher temp has been on the "sunny" side of the trailer. Guess it makes sense. I have also seen several pounds difference in tire pressure from the "sunny" to shaded side as well. Link to comment Share on other sites More sharing options...
NCTribute Posted February 4, 2016 Report Share Posted February 4, 2016 I have always just touched them, they should never be too hot to touch. 138F is getting pretty warm, I would check the preload on the bearings. Link to comment Share on other sites More sharing options...
johnd Posted February 5, 2016 Report Share Posted February 5, 2016 Good info, thanks I too always just "touch" them. After first 45 min or so and every time we stop for fuel or wife's bathroom break Link to comment Share on other sites More sharing options...
hurricane Posted February 5, 2016 Report Share Posted February 5, 2016 Never checked mine other than by hand, those numbers don't seem too high. If its possible you might move the boat a little forward on the trailer to equal the load on the axles, weight difference is prolly the reason for temp difference. Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted February 5, 2016 Report Share Posted February 5, 2016 On the hottest summer days while running the Interstate, all mine are about 110 degrees. Like Grant said, the sunny side is usually about 5 degrees warmer. The fact that your front hubs are 18 to 28 degrees cooler that the rear hubs makes me thing that your castle nuts are over tightened on the rears or the back axle is carrying more weight than the front. Is your trailer sitting level behind your tow vehicle? Link to comment Share on other sites More sharing options...
Headhunter Posted February 5, 2016 Author Report Share Posted February 5, 2016 Yes, sitting level and the boat is snugged up tight to the winch. It's a welded bunked trailer so I don't know how much wiggle room I have to move it on the trailer Link to comment Share on other sites More sharing options...
Indy 21 Posted February 5, 2016 Report Share Posted February 5, 2016 I was just thinking about this topic the other day because my rear hubs are always warmer to the touch than the front ones. I just figured the rear brakes worked harder, but maybe it is a weight distribution issue. However, I did have a grease cover pop off a few months ago because a caliber locked up. Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted February 6, 2016 Report Share Posted February 6, 2016 Yes, sitting level and the boat is snugged up tight to the winch. It's a welded bunked trailer so I don't know how much wiggle room I have to move it on the trailer The bunks may be welded but the winch stand is not. Before I'd move anything, I'd put a scale under the jack-stand and see what the tongue weight is with the trailer sitting level. To determine level, park on relatively level ground and measure from the I-beams to the ground (front and back). If the distance is the same, then both axles are carrying about the same weight. Use the jack stand to raise or lower until the trailer, until the distances are the same, then observe the tongue weight. Should be about 10 to 15 percent to the total weight of the entire rig. Link to comment Share on other sites More sharing options...
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