The width of the seal is not going to have any effect on a wheel bearing getting hot, unless it has allowed all the gear lube to run through the wheel bearing and has washed the wheel bearing grease out.
If the seal goes into the housing first, it is suppose to keep the gear lube out of the bearing. Gear lube running through a grease packed wheel bearing will wash the grease out of the bearing, but it will leave a grease trail from the bearing/axle down inside the brake backing plate and all over the brake shoes.
The brake size does not have any effect on the wheel bearing or seal. That into is for the "guys" at the parts counter to ask, so they can sell you other stuff related to your brake size. If you had a grease/gear lube leak because of a failed bearing or seal, your brake shoes could have a coat of grease covering the shoes or the inside of the drum, that would make that wheel a lot hotter then the other side. Maybe you need to replace your brake shoes and clean up the drum.
If the axle & bearing turn smoothly, there are no leaks inside the drum, and the brake shoes are clean and dry, I see no reason for a hot axle end. What are you using to determine the bearing is hot, and how much hotter is it then the other side? Gene
CAN'T YOU READ, I said, rim has been getting too hot to touch & most of the time you use your hand, Means I could not keep my hand on it, it was so hot! lol The other side is real warm, but that's prob. from heat transfer, They use to not do that, even with old bearing that had play in it!