2009 Polaris Scrambler 500 4x4 2x4 factory service manual, Page 172Get this manual
FINAL DRIVE
AWD STRUT CASTING FRONT DRIVE AXLE SEAL REPLACEMENT
BEARING REPLACEMENT NOTE FOR FRONT DRIVE AXLE AND FRONT HUB
NOTE: The front axle bearings have larger I.D(1.0625than the hub bearings (1.000 )Be sure to install the bearings with the larger I.Din the strut housing, and the bearings with the smaller I.Din the hub
SEAL SLEEVE REPLACEMENT
Front Drive Axle Seal Sleeve