Arctic Cat 660 cc, Service Manual

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9
ADJUSTING
1. Loosen the idler wheel cap screws.
2. Loosen the rear idler wheel adjusting bolt jam
nuts.
0735-454
„
NOTE: To ensure proper track tension adjust-
ment, perform all adjustments on both sides of the
snowmobile.
3. If the deflection (distance between the bottom of
the wear strip and the inside of the track) exceeds
specifications, tighten the adjusting bolts to take
up excessive slack in the track.
4. If the distance between the bottom of the wear
strip and the inside surface of the track is less than
specified, loosen the adjusting bolts to increase the
slack in the track.
5. Check track alignment (see Track Alignment in
this sub-section).
6. When proper track tension is obtained, tighten the
adjusting bolt jam nuts against the axle housings.
7. Tighten the idler wheel cap screws securely.
„
NOTE: Since track tension and track alignment
are interrelated, always check both even if only
one adjustment seems necessary.
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
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.
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.
0727-729
! 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 opera-
tion, severe personal injury could result.
! 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.
! WARNING
The tips of the skis must be positioned against a
wall or similar object for safety.