2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 220Get this manual
FINAL DRIVE 10Inspect the rollers (B) for nicks, scratches and flat spotsInspect the roll cage (C) for damage or cracksThe rollers must slide up and down freely within the roll cage surfacesInspect the ring gear (D) for consistent wear patternsSurfaces should be free of nicks or burrsD 13Inspect the armature plate for consistent wear patternUneven wear of the armature plate indicates warped plate, which may cause intermittent operation (refer to "AWD Diagnosis" for inspection)
B 11Inspect roll cage sliding surfacesThese surfaces must be clean and free of nicks, burrs or scratches12Remove and inspect the H-springs (E)If the spring legs appear to be flattened or damaged, replace the roll cage and H-springs as an assemblyE 14Inspect the magnetic coil (F) in the cover plate assembly (refer to "AWD Diagnosis" for inspection)F