huntertim214· Sep 2020 TOTM Winner
As Blazer mentioned, you can buy a 30mm wheel bearing greaser to service them. Basically it forces grease between the two pieces of the bearing, and it will push out a lot of the crap that's it there until you get clean grease coming out. Also recommended for new bearing as they don't have much grease in there from the factory. I did mine at around 1000 miles, but it has seen a fair bit of trail water, sand, and some mud in those miles. There are bearing greasing tools for some other machines (RZR, etc) that allow you to use it without removing the axle, but with the Teryx you need to pull the axle out of the bearing to do it. Not difficult, but a little time consuming.