2008 Polaris Ranger RZR Service Manual, Page 264Get this manual
BRAKES 8Clean the caliper body, piston, and retaining bracket with brake cleaner or alcohol2Inspect piston for nicks, scratches, pitting or wearMeasure piston diameter and replace if damaged or worn beyond service limit
Clean Components
NOTE: Be sure to clean seal grooves in caliper body
= In mmCaliper Piston O.D Std: 1.002" (25.45 mm) Service Limit: 1.000" (25.4 mm) 3Inspect the brake disc and pads as outlined in this chapter
Caliper Inspection
1Inspect caliper body for nicks, scratches, pitting or wearMeasure bore size and compare to specificationsReplace if damaged or worn beyond service limit