2009 Polaris Scrambler 500 4x4 2x4 factory service manual, Page 180Get this manual
FINAL DRIVE 11Remove the Orings from left side of the axle
Brake Disc
9Remove the three bolts that secure the sprocket guard (C) on the other side of the axle
12Slide the axle out the right side of the axle housing
CONCENTRIC SWINGARM REAR AXLE ASSEMBLYINSTALLATION
1Apply Never Seize onto the splines of the axleLubricate and install the Oring (A), sprocket hub (B), and sprocket (B)Slide the axle into the right side of the axle housing