My Tracker trailer has the Bearing Buddies too. I have been fighting them this summer, one flew off on the Interstate somewhere, hope it did not fly thru a window. Another crapped out on a back road, I drove a hour or more flinging grease all over.
The bearings are still good, but one seems to be leaking inside the hub. Where do you get a seal to repair it? From the looks of the trailer, the hubs and the caps are all Bearing Buddies. The spindles have a zerk fitting also that prohibits install of a regular cap.