Arctic Cat 660 cc, Service Manual, Page: 301 / 396

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7. Inspect the chain for proper engagement with the
clutch sprocket and the chain sprocket.
8. Inspect that the chain tensioner assembly is in
place and functioning properly.
9. Install the rear chain guard and secure with five
machine screws. Tighten securely.
Installing Skid Frame
1. Place a piece of cardboard on the floor to protect
against scratching and tip the snowmobile onto
one side.
2. Pull the track away from the tunnel and spread
open; then place the skid frame into the track.
3. Position the front of the skid frame into the tunnel
and align the rear suspension arm with the appro-
priate mounting hole in the tunnel. Slide the lock
washer onto the cap screw; then secure the arm to
the tunnel with the cap screw and lock washer.
Thread the cap screw in only half way. DO NOT
TIGHTEN AT THIS TIME.
„
NOTE: To aid in centering the rear arm with the
holes in the tunnel, position the skid frame and
track at a 45° angle to the bottom of the tunnel.
4. Place the snowmobile in the upright position; then
secure the opposite side upper idler wheel assem-
bly.
5. Securely tighten all upper idler wheel mounting
hardware.
6. Tighten all skid frame/axle mounting cap screws
securely.
7. Check track tension; adjust as necessary (see
Track Tension in this sub-section).
Track Tension
„
NOTE: Track tension and track alignment are
interrelated; therefore, always check both, even if
only one adjustment seems necessary.
Track tension is directly related to the overall perfor-
mance of the snowmobile. If the track is too loose, it
may slap against the tunnel causing wear, or it may
ratchet on the track drive sprockets. Arctic Cat recom-
mends that the track tension be checked once a month
and adjusted accordingly.
CHECKING
1. Remove excess ice and snow buildup from the
track, track drive sprockets, and the inside of the
skid frame.
2. Place the rear of the snowmobile up on a safety
stand high enough so the track is free of the floor.
3. Without exerting any pressure on the track, mea-
sure the distance between the bottom of the wear
strip and the inside surface of the track. The mea-
surement must be within specifications. If the
measurement is not within specifications, an
adjustment is necessary.
735-669A
! WARNING
Track tension must be properly maintained. Per-
sonal injury could result if a track is allowed to
become excessively loose.
! WARNING
DO NOT attempt to check or adjust track tension
with engine running. Turn ignition key to the OFF
position. Personal injury could result from contact
with a rotating track.