2006 Honda TRX680 Rincon Factory Service Manual, Page 465Get this manual
FRONT DRIVING MECHANISM Replace the cam Check the shim, face cams and followers for damfollowers as set age112 pieces)
FACE CAM
CAM FOLLOWERS Temporarily assemble the differential housing, face cams and cam followers (page 18-27)Measure the height of the face cam from the housing mating surface as shown while applying load of 1.47 kN (150 kgf) to the face cam boss using hydraulic pressSERVICE LIMIT: 3.3 mm (0.13 in) If the height is smaller than the service limit, replace the differential as an assembly