Polaris 2009 Sportsman XP 850 Service Manual page 220

FINAL DRIVE
10. Inspect the rollers (B) for nicks, scratches and flat spots.
Inspect the roll cage (C) for damage or cracks. The rollers
must slide up and down freely within the roll cage surfaces.
Inspect the ring gear (D) for consistent wear patterns.
Surfaces should be free of nicks or burrs.
D
11. Inspect roll cage sliding surfaces. These surfaces must be
clean and free of nicks, burrs or scratches.
12. Remove 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 assembly.
IMPORTANT: Refer to the "Electronic Parts Catalog"
for individual part availability. Most parts are to be
replaced as an assembly or as a complete kit.
8.18
C
B
E
Legs should be
arched as shown
13. Inspect the armature plate for a consistent wear pattern.
Uneven wear of the armature plate indicates a warped plate,
which may cause intermittent operation (refer to "AWD
Diagnosis" for inspection).
14. Inspect the magnetic coil (F) in the cover plate assembly
(refer to "AWD Diagnosis" for inspection).
G
15. Inspect the backlash thrust button (G) and thrust pad for
excessive wear.
NOTE: Ring gear backlash is set at the factory. No
adjustment is required unless the front cover is
replaced or the backlash thrust pad screw is
removed. Refer to "Setting Ring Gear Backlash"
later in this chapter for details on backlash setting.
F