My bearing buddies have an overfill hole. I fill them until grease starts coming out. Am I doing something wrong? I also inspect/repack/replace my bearings every spring. In addition, I check my bearing temperature(hand on hub), at every stop to ensure they are not heating up. IMHO few people(professionals included) properly pack bearings(not too tight, not too loose) and that is why you see the broken down trailers.