ZachO - Sorry did not answer sooner but I am new to this form of communicating.
I did not have any info to go by when I came up with this idea. All I know is thumping tire does not always work and does not troubleshoot a bearing situation. So I know from teaching, destroyers are pressure, dirt, and HEAT. So I came up with a quick and easy to use solution, laser temp gun. On my coach I run the largest tires I can put on my coach, not that I intent to overload it. On my car hauler I run the highest load tire I can also get. Both of these are done for safety. What I did was repacked the bearings on my trailer, the coach only had 25,000 miles on it. This was my starting point, drove for 60 miles, recorded all temperatures. Drove another 60 recorded again. Tires were slightly higher. Tires - Coach 85-90F degrees(30,000 lbs.), trailer 80-85F degrees(7,000 lbs.). Axles-Coach Front 80-90F, Rear 90F. These can vary with change in outside temperature. The main thing you are going to look for are differences. My trailer tires all read within a very few degrees, all had same pressure. Coach tires are all 110 PSI, this is the cut out on my coach air system compressor which I use to fill them. Low tire is going to produce more heat, when a wheel bearing is starting to go the temperature is going to start climbing. Feeling is different for all of us, the laser gun is consistent. I even found 10-15F difference from side to side when going south in the morning, driver side is hotter(sunny side). The axle
temps seemed not to vary as much. Coach axle
temp climbed as the day went on, doing 500 miles a day. From memory I believe it climbed to 150F, I run 85W-145W synthetic gear oil so this temp is no problem. As it gets hotter it has additives which tend to thicken it. Biggest use for the gun it to determine differences from normal. After a few time your mind will establish a normal, lights
will come on in your head when you see something is different. Be Safe