2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 292Get this manual
FINAL DRIVE REAR HUB
Removal
1Place the ATV in Park and lock the parking brakeRemove rear hub cap7Remove the rear brake caliper and safely suspend the caliper from the frame with piece of wire
8Remove hub nut, domed washer and flat washerB C