Snowmobile Arctic Cat (2008 year). Manual - part 137

7-108

FZ084A

5. Secure the front arm to the slide rail with the cap

screws and lock nuts. Tighten to 32 ft-lb.

FZ070

„NOTE: At this point, return to steps 3 and 4 and
tighten the rear arm and front arm cap screws and
lock nuts to 40 ft-lb.

6. Install the adjuster bushing and rear idler wheel.

Install a cap screw and flat washer. Tighten only

until snug.

FZ066

„NOTE: Care must be taken that the adjuster
bushing slot with the hole is aligned properly with
the adjuster bolt.

CM261A

„NOTE: It is advisable to tighten the rear idler
wheel axle only until snug until the skid frame has
been installed and track tension has been
adjusted; then the axle assembly must be tight-
ened to 20 ft-lb.

7. Install coupler block w/bushing. Secure with cap

screw. Tighten securely.

FZ076

8. Install the rear arm limiter and secure with the cap

screw. Tighten the cap screw (coated with blue

Loctite #243) to 50 ft-lb.

FZ075

9. Place the spring into the slide block; then place the

spring slide and slide block assembly into position

on the slide rail. Secure with a cap screw and

washer. Tighten to 20 ft-lb.

7-109

7

FZ074

10. Install the inner idler wheel mounting block and

secure with cap screw and lock nut. Tighten to 20

ft-lb.

FZ073

„NOTE: To obtain proper alignment for the idler
wheel cap screw, place the cap screw in the top
hole through the rail and mounting block prior to
tightening.

FZ073A

„NOTE: On the Sno Pro models, install the rear
inner idler wheel mounting block and idler wheel.

11. Secure the outer idler wheel mounting block with

the cap screw and lock nut. Tighten to 20 ft-lb;

then secure the outer and inner idler wheels to the

mounting blocks with existing hardware. Tighten

to 20 ft-lb.

ZJ288

„NOTE: To obtain proper alignment for the idler
wheel cap screw, place the cap screw in the top
hole through the rail and mounting block prior to
tightening.

MS997A

12. Secure the rail supports with cap screws. Tighten

to 20 ft-lb.

FZ077

13. With the spacer on the front rail support centered

between the limiter straps, secure the straps to the

rail support with the cap screw, washers, and lock

nut. Tighten to 10 ft-lb.

7-110

FZ078A

14. Secure the end cap onto the slide rail using a cap

screw, flat washers, and a lock nut. Tighten to 7 ft-

lb.

FZ079A

„NOTE: Apply a light coat of grease to the slide
rail surface to aid in installing a new wear strip. If
there are any sharp edges on the lower portion of
the rail, use a file to remove them.

MS288

15. From the back, start the wear strip onto the rail;

then using a soft hammer, drive the wear strip for-

ward into position. Secure with a torx-head screw

and lock nut. Tighten to 50 in.-lb.

MS207

MS016B

16. Install the skid frame (see Installing Skid Frame in

this sub-section).

„NOTE: It is advisable to install the rear arm
springs onto the adjuster blocks after the skid
frame has been installed.

17. Adjust track tension deflection (see Track Tension

in this sub-section) and track alignment (see Track

Alignment in this sub-section).

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 engage the front arm with the slider axle in the

tunnel.

! 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.

7-111

7

0742-187

„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 arm assembly with the appropriate

hole in the tunnel. Secure the pivot 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 arm assembly with the appropriate hole

in the tunnel. Secure the pivot 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 securely.

8. Using the Rear Suspension Spring Tool, install the

short legs of the rear springs onto the adjusting

cams making sure the cams are in the same adjust-

ment positions.

9. Tighten the two track tension adjusting bolt evenly

until track deflection is within specifications; then

lock the jam nuts to secure the adjustment.

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.

2. If the measurement is not as specified, loosen the

jam nuts of the adjusting bolts.

0742-921

3. If the measurement obtained in step 2 is more than

specified, tighten the adjusting bolts. If the mea-

surement obtained is less than specified, loosen

the adjusting bolts. When the measurement 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.

! WARNING

Deactivate all switches.

Rear Suspension Style

Setup

Tension

After Break-In

Tension

FasTrack w/Torque Sensing 
Link (128 in. Track) @ 20 lb

44-51 mm

(1 3/4-2 in.)

51-57 mm

(2-2 1/4 in.)