Arctic Cat Altera 300 Service Manual page 55

3. Inspect the shift cam groove and shift cam gear for
excessive wear.
KM624
4. Inspect the shift shaft and gear for excessive wear.
Check that the spring is not broken.
KM683
5. Inspect all gear teeth for chipping, discoloration, pit-
ting, or excessive wear. Replace as required.
6. Inspect clutch dogs and mating surfaces for chip-
ping, rounding, or excessive wear. Replace as
required.
7. Inspect all bearings, bushings, seals, and shafts for
proper fit, surface mating, or discoloration. Replace
as required.
8. Inspect transmission housing and cover for cracks,
scoring or galling of bearing bores, or case discolor-
ation.
9. Inspect the drive and driven bevel gears for chipping,
flaking, or excessive wear in the splines. Replace as
required.
KM422
54
10. Inspect the secondary driven bevel gear housing for
cracks, loose bearings, or signs of discoloration from
heat. Replace as required.
11. Inspect the driven shaft for scoring, discoloration, or
worn splines.
KM421
SECONDARY GEARS
Checking Backlash
1. Remove the secondary drive bevel gear cover.
2. Mount a dial indicator so as to allow the tip to con-
tact the secondary driven bevel gear.
3. Mount the indicator tip of the dial indicator on the
secondary driven bevel gear (centered on the gear
tooth).
4. While rocking the driven bevel gear back and forth,
note the maximum backlash reading on the gauge.
5. Acceptable backlash range is 0.03-0.15 mm
(0.001-0.006 in.).
Correcting Backlash
 NOTE: If backlash measurement is within the
acceptable range, no correction is necessary.
1. If backlash measurement is less than specified,
remove an existing driven bevel gear shim, measure
it, and install a new thinner shim.
2. If backlash measurement is more than specified,
remove an existing driven bevel gear shim, measure
it, and install a thicker shim.
NOTE: Continue to remove, measure, and install

until backlash measurement is within tolerance. Note
the following chart.
Backlash Measurement
Under 0.03 mm (0.001 in.)
At 0.03-0.15 mm
(0.001-0.006 in.)
Over 0.15 mm (0.006 in.)
Checking Tooth Contact
NOTE: After correcting backlash of the secondary

driven bevel gear, it is necessary to check tooth con-
tact.
1. Remove the secondary driven output shaft assembly
from the left-side crankcase half.
Shim Correction
Decrease Shim
Thickness
No Correction Required
Increase Shim
Thickness