2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 334Get this manual
BRAKES Overview: Sportsman Forest 500 (INTL A12MH50FF)
The Sportsman brake system consists of complete hydraulic brake systemAll-wheel braking is integrated into the foot brake and hand brake systems and allows wheel braking from either control separately, or at the same timeWhen the foot brake is applied, all brake calipers are active, as braking pressure is routed from the foot brake master cylinder through the proportioning valve and distribution block, exiting one line to the front calipers, while the other line exits the proportioning valve and feeds the outer line of the rear calipersWhen the hand brake is applied, all brake calipers are active, as braking pressure is routed from the hand brake master cylinder through the distribution block, exiting one line to the front calipers, while the other line feeds the inner line of the rear calipersWhen servicing Polaris ATV brake systems, use only Polaris DOT-approved brake fluid
BRAKE NOISE TROUBLESHOOTING
POSSIBLE CAUSE REMEDY Spray disc and pads with CRC Brake Kleen or equivalent non-flammable aerosol brake cleanerRemove pads andor disc hub to clean imbedded material from disc or padsAdjust pad stop Set to proper level Check brake fluid level, adjust as needed