All I can say is that I checked my old Komfort's bearings for heat at every stop and jacked each wheel up yearly to check for play in the bearings. I'd also grease the EZLubes at the same time, spinning the wheel and stopping when I heard popping sounds, just like we did on everything we greased on the farm. When I had the wheels pulled after 10 low-mileage years, there was still no play, the bearings were in excellent shape and I =could= have reused them, but chose to replace them and the seals. Had the brakes adjusted at the same time. Ran for another 3 years doing the same thing, then I sold it. Never had a seal issue, never had grease on the brakes. NOT a fan of the NEVRLubes...
Lyle