2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 356Get this manual
BRAKES 4Compress the mounting bracket and make sure the dust seals are fully seatedInstall the brake padsClean the disc and pads with brake parts cleaner or denatured alcohol to remove any dirt, oil or grease4Remove the slide bolt snap rings (A), the slide pins (B), the bracket pad (C), and the brake pads (D)
Caliper
5Remove the anvil bolts and separate caliper halves and remove pistons with piston pliers
SPORTSMAN REAR CALIPER
Removal and Inspection
1Clean caliper area before removal2Using flare nut wrench, remove hand brake (inner) and auxiliary brake (outer) lines (arrows)Place container to catch brake fluid draining from brake lines