JUST A NOTE HERE
I have seen many bearings wasted on snow cat boggy wheels.
Treat these like a boat trailer that gets dunked in the water all the time.
Snow water is the softest water on the planet, and these wheels are running down in powdery soft or often sloppy snow..
The tires and wheels and spindles generate heat, and when they cool off they actually can suck water inside past the seal.
Even with bearing buddies (Grease fitting caps) water will get in.
The bearings rust up over time....and you will not hear the growling like in a car with a bad bearing....eventually the wheel comes off and or you end up with a spindle like the one above.
Bearings on these machines need to be cleaned, inspected and repacked after the season is over....
The cat we had at the snowmobile club years ago suffered a spindle failure similar to the one above....Turned out that all the bearings in the track wheels were shot RUST AND WATER
Just an FYI