2003 Polaris 3 PRO X Factory Service Manual, Page 192Get this manual
CHASSISBRAKESFINAL DRIVE Inspection
1Clean the master cylinder assembly with clean Dot brake fluid, brake parts cleaner, or denatured alcoholDry thoroughlyInspect the bore for nicks, scratches or wearReplace if damage is evident or if worn2Inspect parking brake for wearIf teeth or locking cam are worn, replace lever
Assembly
1Install new primary and secondary seals on the pistonOuter Dust Seal
Primary Seal
Secondary Seal