What does this mean with regards of what the owner needs to do? I have 6000 miles on my 2015 Winnebago travel trailer that has self-lubing wheel hubs. I have never had them lubricated.
From what I read and see on this Forum regarding hubs, bearings, and on new trailers, I'd suggest to have the hubs pulled off, lubrication checked, and the bearings packed and installed. There are more than a few that have found their hubs and bearings without grease or installed incorrectly. At 6000 mi., it is probably a good service interval to check them, anyway.