2011 Arctic Cat 450XC Service Manual, Page 57Get this manual
4While rocking the driven bevel gear back and forth, note the maximum backlash reading on the gauge5Acceptable backlash range is 0.05-0.33 mm (0.0020.013 inCorrecting Backlash NOTE: If backlash measurement is within the acceptable range, no correction is necessary
1If backlash measurement is less than specified, remove an existing shim, measure it, and install new thinner shimMD1330
CAUTION
Do not remove the remaining output shaft assembly unless absolutely necessaryIf the shaft is removed, the shaft nut must be replaced with new one and the shaft must be re-shimmed
2If backlash measurement is more than specified, remove an existing shim, measure it, and install thicker shimNOTE: Continue to remove, measure, and install until backlash measurement is within toleranceNote the following chartBacklash Measurement
Under 0.05 mm (0.002 in At 0.05-0.33 mm (0.002-0.013 in Over 0.33 mm (0.013 in
8Remove the secondary drive gearsecondary driven gear retaining nutFrom inside the crankcase using rubber mallet, drive out the output shaft assemblyAccount for the output shaft, shim, washer, and the nut