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Prior to coming down the mountain the brake drums were all cooler than the hub except for the hottest one which was the same temp. Due to the amount of contact and the mass of metal, the hub and brake drum act as a heat sink for each other and pretty quickly the temperatures will equalize...

Floridianson, that was my M817 not the OP’s deuce that had the 370* hub. That temp was taken just after coming down a 1-1/2 mile 8-10% grade so there was brake heat involved. Prior to that mountain grade, that hub was around 340 * and the other three were between 280*-290* with the fronts at...

Interesting, and much more precise on the back-off turn. I saved that pdf to my files for future reference. I can see how that initial high preload would be necessary when installing new bearings. Especially if a press is not used to seat the outer bearing races. In a situation like mine where...

Per the -20 there is no 100 lb-ft used. “Continuously turn wheel (3) while tightening inner adjusting nut (4) 50 lb-ft (68 N•m), then back off inner adjusting nut (4) 1/4- to 1/3-turn. Install adjusting nut washer (2) and adjusting nut (1). Tighten outer adjusting nut (1) 250-400 lb-ft...

I am not trying to say that what I experienced with my truck proves anything. Only time will tell, but when I change those seals again, if the same thing happens then I think that will give some evidence that rubber on metal can create heat. I have the temperatures readings documented and all...

Definitely agree to that. When I got my truck the one wheel had a small amount of oil in it. On my recovery trip that wheel ran the coolest. I decided to keep the original greased bearing setup because I am using the truck on a road that definitely qualifies as “off-road” and I have to ford two...

The IR thermometer should be on the short list of tools to carry for any large truck, FMV or not. I once saved a drive line u-joint and have discovered other potential failures by just pointing that thing at any critical or moving parts every time I fuel up while waiting for the tank to fill. It...