2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 354Get this manual
BRAKES TOURING REAR CALIPER
Removal CAUTION
Use care when supporting vehicle so that it does not tip or fallSevere injury may occur1Clean caliper area before removal2Place container below the caliper to catch brake fluid that will drain from the brake lineRemove brake line from caliper 7Clean the caliper body, piston, and retaining bracket with brake cleaner or alcoholNOTE: Be sure to clean seal grooves in caliper body6Remove piston, dust seals and piston seals