2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 182Get this manual
BRAKES CALIPER SERVICE
Caliper Removal
12Loosen the wheel nutsElevate and support the side of the ATV in which the caliper is being serviced
Caliper Disassembly
1Push upper pad retainer pin inward and slip brake pads past edge
CAUTION