I have had mine squeeze out the rear seal. I am now on a two year cycle (why? I don't know, haven't seen any recommendations for or against) of just pushing grease in the EZ hub one year and then doing it by hand the next year and replacing the rear seals.
The first time I pulled it all apart, there was grease all over the drum and brake pads, rendering them useless. That was so much fun to clean up. I am amazed at how well brake cleaner does work. Spray that stuff on and gunk flies out.
It's probably overkill but as much weight behind me as my PUP is, I want those brakes, bearings and seals in top order.