2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 347Get this manual
BRAKES FRONT CALIPER
Removal CAUTION
Use care when supporting vehicle so that it does not tip or fallSevere injury may occur1Loosen and remove brake line to caliperPlace container under caliper to catch fluid draining from brake line3Remove mounting bracket, pin assembly and dust boot