2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 301Get this manual
BRAKES 3Inspect vent slots (A) in cover and remove any debris or blockageC Sight Glass 67Slowly pump the brake lever until pressure builds and holdsWhile maintaining lever pressure, open bleeder screwClose bleeder screw and release brake lever
NOTE: Do not release lever before bleeder screw is tight or air may be drawn into caliper8Repeat procedure until clean fluid appears in bleeder hose and all air has been purgedAdd fluid as necessary to maintain level in reservoirIf changing fluid, remove old fluid from reservoir with Mity Vac pump (PN 2870975) or similar tool
CAUTION
Maintain at least 12", (1.27 cm) of brake fluid in the reservoir to prevent air from entering the master cylinder
Fill Line