Snowmobile Arctic Cat (2008 year). Instruction - part 121

7-44

4. Inspect the cap screw for cracked, stretched, or

damaged threads. Use a new lock nut when assem-

bling.

INSTALLING

1. Position the end cap on the slide rail; then align the

hole in the end cap with the hole in the slide rail.

2. Secure with a cap screw, washers, and lock nut.

Tighten to 7 ft-lb.

Shock Pads

„NOTE: The skid frame does not have to be
removed for this procedure.

REMOVING

„NOTE: The shock pads should be removed only
if being replaced.

1. Using a 3/16-in. drill bit, drill out the rivets secur-

ing the front shock pads to the slide rail. Account

for the retaining brackets.

2. Twist the push nuts off the solid rivets securing the

rear shock pads.

3. Remove the shock pads.

INSPECTING

„NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.

1. Inspect the pads for damage or wear.

2. Inspect the rivet holes in the slide rail for damage

or elongation.

INSTALLING

1. Place the rear pads into position on the slide rail.

2. Secure the rear pads with new push nuts.

3. Place the front pads and retaining brackets into

position on the slide rail.

4. Secure the front pads with rivets.

Front Outer 

Idler Wheels

„NOTE: The skid frame does not have to be
removed for this procedure.

REMOVING

1. Remove the cap screw and lock nut securing the

front outer idler wheel and the idler wheel mount-

ing block.

MS133A

MS134A

2. Account for flat washers and spacers.

CLEANING AND INSPECTING

„NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.

1. Clean the bearing with a clean cloth.

2. Inspect each idler wheel and each plastic hub for

cracks or damage.

3. Rotate the idler wheel bearing (by hand) and

inspect for binding or roughness.

4. If a bearing must be replaced, use this procedure.

A. Remove the wheel insert (if applicable) and the

snap ring.

B. Using a hydraulic press or suitable driving tool,

remove the bearing from the inside of the

wheel.

! CAUTION

Do not remove the bearing unless it is absolutely
necessary. The bearing will be damaged during
removal.

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7

C. Press the new bearing (on its outer race) into

the idler wheel.

MS006A

D. Install the snap ring making sure the “sharp

side” is directed away from the bearing.

MS007A

E. Install the insert (if applicable).

MS008

INSTALLING

1. Secure the mounting block on the slide rail with a

cap screw and lock nut. Tighten to 34 ft-lb.

„NOTE: For proper alignment, it is advisable to
install an idler wheel cap screw into the top mount-
ing block hole prior to tightening.

MS009A

2. Place the idler wheel to the mounting block; then

secure the idler wheel assembly with a cap screw,

flat washer, and a lock nut. Tighten to 34 ft-lb.

MS136

Rear Inner Idler Wheels

„NOTE: The skid frame does not have to be
removed for this procedure.

REMOVING

1. Remove the cap screws, washers, and lock nuts

securing the rear inner idler wheel and the idler

wheel mounting block. Account for all mounting

hardware.

MS137

2. Note the locations of the flat washer for assembly

purposes.

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MS138

CLEANING AND INSPECTING

„NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.

1. Clean the bearing with a clean cloth.

2. Inspect each idler wheel and plastic hub for cracks

or damage.

3. Rotate the idler wheel bearings (by hand) and

inspect for binding or roughness.

4. If a bearing must be replaced, use this procedure.

A. Remove the wheel insert (if applicable) and the

snap ring.

B. Using a hydraulic press or suitable driving tool,

remove the bearing from the inside of the

wheel.

C. Press the new bearing (on its outer race) into

the idler wheel.

MS006A

D. Install the snap ring making sure the “sharp

side” is directed away from the bearing.

MS007A

E. Install the insert (if applicable).

MS008

INSTALLING

1. Secure the mounting block on the slide rail with a

cap screw and lock nut. Tighten to 34 ft-lb.

MS139

„NOTE: For proper alignment, it is advisable to
install an idler wheel cap screw into the top mount-
ing block hole prior to tightening.

! CAUTION

Do not remove the bearing unless it is absolutely
necessary. The bearing will be damaged during
removal.

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7

MS140A

2. Place the idler wheel into position against the

mounting block making sure there is a flat washer

on the cap screw. Tighten to 34 ft-lb.

MS141

Rear Upper Idler 

Wheels/Rear Springs

„NOTE: The skid frame must be removed for this
procedure (see Removing Skid Frame in this sub-
section).

REMOVING

1. Using the Rear Suspension Spring Tool, remove

the spring from the adjusting cam.

AG624DA

2. Mark the pivot arm and the idler arm for assembly

purposes.

MS142

3. Remove the cap screws securing the pivot arm

assembly to the idler arm; then remove the pivot

arm assembly.

MS064

„NOTE: Account for a flanged axle, flared bush-
ing, idler spacer collar, and lock nuts.

4. Remove the idler wheel.

„NOTE: Use Idler Wheel Puller Kit to remove the
wheel.

! WARNING

Care must be taken when removing the spring or
damage or injury could result.