2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 168Get this manual
BRAKES 9Repeat procedure until clean fluid appears in bleeder hose and all air has been purgedAdd fluid as necessary to maintain level in reservoirCAUTION: inlbs(0.56 Nm) Maintain at least 12 (1.27 cm) of brake fluid in the reservoir to prevent air from entering the master cylinder10Tighten bleeder screw securely and remove bleeder hose11Repeat procedure Steps 5-9 for the remaining caliper(s)13Install diaphragm, cover, and screwsTorque the screws to in.lbs(0.56 Nm)Reservoir Cover Torque -
14Field test machine at low speed before putting into serviceCheck for proper braking action and lever reserveWith lever firmly applied, lever reserve should be no less than 12 (1.3 cm) from handlebar15Check brake system for fluid leaks and inspect all hoses and lines for wear or abrasionReplace hose if wear or abrasion is found