I would run like crazy from Vortex Oil Bath Hubs! I'm replacing all of mine with Vaults, after having my second hub/wheel come off while driving this past weekend. They've been terrible since my boat was new. I finally got one of the Vaults, and I'm going to change the rest as soon as they get here from Ranger. Honestly, I had less problems from the old grease and Bearing Buddy's system than I had with oil baths.
One of the biggest problems and design flaws I see with the Vortex oil baths is that the inner bearing/race is actually bigger (ID) than the (OD) of the outer nut. If the outer bearing fails, the wheel and hub can simply come off the spindle right past the nut, off to where ever it likes. I never felt it when they came off, but luckily, I went back and found the wheel both times. Could have been very dangerous.
As I understand, the Vaults are warranted for life, and no service for 100K miles. I'll keep a vortex in my truck as a spare, but I'm looking forward to not worrying about hubs!
Total Recreation Products Inc.
Commercial Park and Playground Products and Services
Ranger Z520 250ProXS