Arctic Cat Sno Pro 120 2013 Service Manual page 42

! WARNING
If jam nuts are not tightened properly, the adjusting
bolts could loosen causing the track to become
extremely loose and, under some operating condi-
tions, allow the idler wheels to climb over the track
lugs forcing the track against the tunnel causing the
track to "lock." If a track "locks" during operation,
severe personal injury could result.
TRACK ALIGNMENT
Proper track alignment is obtained when the rear idler
wheels are equal distance from the inner track drive lugs.
Excessive wear to the idler wheels, drive lugs, and track
will occur if the track is improperly aligned. Arctic Cat
recommends that the track alignment be checked once a
week or whenever the track tension is adjusted.
Checking
! WARNING
Make sure the ignition key is in the OFF position and
the track is not rotating before checking or adjusting
track alignment. Personal injury could result if contact
is made with a rotating track.
1. Remove excess ice and snow buildup from the
track, track drive sprockets, and the inside of the
skid frame.
2. Position the tips of the skis against a wall; then
using a shielded safety stand, raise the rear of the
snowmobile off the floor making sure the track is
free to rotate.
! WARNING
The tips of the skis must be positioned against a wall
or similar object for safety.
3. Start the engine and accelerate slightly. Use only
enough throttle to turn the track several revolu-
tions. SHUT ENGINE OFF.
 NOTE: Allow the track to coast to a stop. DO NOT
apply the brake because it could produce an inaccurate
alignment condition.
4. When the track stops rotating, check the relation-
ship of the rear idler wheels and the inner track
drive lugs. If the distance from the rear idler
wheels to the inner track drive lugs is the same on
both sides, no adjustment is necessary.
5. If the distances from the rear idler wheels to the
inner track drive lugs are not the same on both
sides, an adjustment is necessary.
Adjusting
1. On the side of the track which has the inner track
drive lugs closer to the rear idler wheel, loosen the
idler wheel cap screw and the adjusting bolt jam
nut; then rotate the adjusting bolt clockwise 1 to 1
1/2 turns.
2. Check track alignment and continue adjustment
until proper alignment is obtained.
 NOTE: Make sure correct track tension is maintained
after adjusting track alignment (see TRACK TENSION
sub-section).
3. After proper track alignment is obtained, tighten
both the adjusting bolt jam nut and the idler wheel
cap screw securely.
! WARNING
If a jam nut is not tightened properly, the adjusting bolt
could loosen causing the track to become danger-
ously loose.
4. Field test the track under actual conditions; then
make additional adjustments as necessary.
727-729A
0744-947
39