[huntertim214]

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.

 

[huntertim214]

are the fronts and backs the same size (30mm)?

They are the same diameter but different thicknesses. I have the tool from Machined Integrations and the same piece works for both the front and rear, but I don't think they make them anymore and I'm not sure if that is true for other manufacturers or not. Another brand that I've heard Teryx owners use is called Two Guys Hobby but if I remember correctly they are a slightly different design and use one tool for the front and one for the back.

 

[huntertim214]

Brute Force makes a wheel bearing grease tool that makes it a professional quality job you can do at home. Don’t forget those ball joints too! You may need a pencil/ pen style grease gun needle. I do for my Super ATV ball joints.

Brute Performance? I don't believe that they make or sell the greaser tool anymore. Good point about ball joints as well.