Snowmobile Arctic Cat (2007 year). Manual - part 129

9-131

0742-187

0742-145

NOTE: To aid in centering the front arm with the
hole in the tunnel, position the skid frame and
track at a 45° angle to the bottom of the tunnel.

4. Push the rear of the skid frame and the track into

the tunnel.

5. Align the pivot idler arm assembly with the

appropriate hole in the tunnel. Secure the pivot

idler arm assembly with a cap screw, lock

washer, and flat washer. AT THIS TIME,

TIGHTEN ONLY UNTIL SNUG.

6. Tip the snowmobile onto the other side; then

align the pivot idler arm assembly with the

appropriate hole in the tunnel. Secure the pivot

idler arm assembly with a cap screw, lock

washer, and flat washer. AT THIS TIME,

TIGHTEN ONLY UNTIL SNUG.

NOTE: Do not install the short legs of the rear
springs onto the adjusting cams at this time.

7. At this time, place the snowmobile to the

upright position; then tighten both pivot arm

mounting cap screws to specifications.

8. Using the Rear Suspension Spring Tool (p/n

0144-311), install the short legs of the rear

springs onto the adjusting cams making sure the

cams are in the same adjustment positions.

9. Tighten the two track tension adjusting bolt

evenly until track deflection is within specifica-

tions; then lock the jam nuts to secure the adjust-

ment.

10. Check track tension deflection and alignment;

adjust if necessary (see Track Tension and Track

Alignment in this sub-section).

Track Tension

CHECKING DEFLECTION

1. Tip the snowmobile on its side.

2. Hook a spring scale around a track clip at mid-

span; then pull the track down with the scale to 9

kg (20 lb) and measure the distance between the

bottom of the wear strip and the inside surface

of the track clip. Track deflection must be within

specifications.

729-429A

NOTE: If the track is new, it will stretch slightly
and take a “set” within the first 300 to 500 miles of
operation.

ADJUSTING DEFLECTION

1. Place the snowmobile up on a shielded safety

stand. Check to make sure the track is 2-3 in. off

the floor.

! CAUTION

When installing the skid frame, make sure the rear
arm shock mounting location on the pivot/axle is
positioned correctly above the axle or component
damage will occur.

! WARNING

Deactivate all switches.

Rear Suspension Style

Setup

Tension

After Break-In

Tension

FasTrack w/Torque Sensing
Link (121 in. Track) @ 20 lb

44-51 mm

(1 3/4-2 in.)

51-57 mm

(2-2 1/4 in.)

9-132

2. If the measurement is not as specified, loosen

the jam nuts of the adjusting bolts.

0727-456

3. If the measurement obtained in step 2 is more

than specified, tighten the adjusting bolts. If the

measurement obtained is less than specified,

loosen the adjusting bolts. When the measure-

ment is within specification range, lock the

adjustment by bottoming the jam nuts against

the axle housings.

NOTE: If the track tension must be loosened, it
may be necessary to loosen the rear axle assem-
bly slightly.

NOTE: Vigorously push the underside of the
track up and down. Track must not hit the top of
the tunnel or slap the skid frame.

4. After correct track tension is obtained, check

track alignment (see Track Alignment in this

sub-section).

NOTE: Track tension and track alignment are
interrelated; always check both even if only one
adjustment seems necessary. Always establish
correct track tension before checking and/or
adjusting alignment.

Track Alignment

NOTE: Proper track alignment is when the rear
idler wheels are equidistant from the inner drive
lugs on the inside surface of the track.

CHECKING/ADJUSTING

1. Using a shielded safety stand, raise the rear of

the snowmobile off the floor making sure the

track is free to rotate.

2. Start the engine and accelerate slightly. Use only

enough throttle to rotate the track several revo-

lutions. SHUT THE ENGINE OFF.

NOTE: Allow the track to coast to a stop. Do not
apply the brake because it could produce inaccu-
rate alignment conditions.

3. When the track stops rotating, check the rela-

tionship of the rear idler wheels and the inner

track drive lugs. If the distance from the idler

wheels to the inner drive lugs is the same on

both sides, no adjustment is necessary.

725-070A

4. On the side of the track which has the inner

drive lugs closer to the rear idler wheel, loosen

the adjusting bolt jam nut; then rotate the adjust-

ing bolt clockwise 1-1 1/2 turns.

NOTE: If the track tension must be loosened, it
may be necessary to loosen the rear axle assem-
bly slightly.

5. Continue to check the track alignment and make

the necessary adjustments until proper align-

ment is obtained.

6. After proper track alignment is obtained, lock

the jam nut against the axle housing.

! CAUTION

After proper track tension and alignment have been
attained, make certain that the rear axle assembly is
tightened to specifications or component damage
will occur.

! WARNING

The tips of the skis must be positioned against a
wall or similar object for safety. Keep hands, feet,
and clothing away from moving components.

9-133

NOTE: Make sure correct track tension is main-
tained after adjusting track alignment.

NOTE: Field test the track under actual condi-
tions and, after the field test, check track align-
ment and track tension; adjust as necessary.

! CAUTION

After proper track tension and alignment have been
attained, make certain that the rear axle assembly is
tightened to specifications or component damage
will occur.

9-134

DRIVE SPROCKET/TIMING MARKS LOCATION

The following illustrations will provide all necessary

information to relocate sprockets on the driveshaft.

When information is required to assemble the drive-

shaft, refer to the parts manual for model being

worked on; then refer to the following illustrations

using the part number listed in the parts manual as a

reference.

When pressing new sprockets on the driveshaft,

remember to align the sprocket alignment marks or

the sprockets won’t be timed correctly. See illustra-

tions.

739-057B

739-059B

737-843B

Sprocket “Timing Mark”

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