that system is worthless and cant figure out why they insist on continuing . just try to find replacement parts for that set up in a small mid state Nebraska town .
still have the original bearings and seals on a 2004 floe trailer, never had a problem.
the company that made them stopped making them about 3 years ago, parts are no longer available.
now floe uses their new version of greased hubs, i think they are called vortex hubs.
from what I got from floe is if the bearings are still good, you can just pack them with grease and reinstall like normal. with out using oil
and you can just use normal seals and bearings if you need to replace them