Snowmobile Arctic Cat (2008 year). Manual - part 123

7-52

MS150

MS151A

2. Place the outer idler wheels on the axle and secure

with two cap screws (coated with blue Loctite

#243) and large flat washers. Tighten cap screws

only until snug.

MS152

„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 40 ft-lb.

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

this sub-section).

4. Adjust track alignment (see Track Alignment in

this sub-section).

5. Adjust track tension deflection (see Track Tension

in this sub-section).

Rear Arm/Idler Arm

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

DISASSEMBLING

1. Remove the rear upper idler wheels and springs

(see Rear Upper Idler Wheels/Rear Springs in this

sub-section).

MS153

2. Remove the cap screw and lock nut securing the

upper shock eyelet to the idler arm. Account for a

spacer, cap screw, and lock nut.

MS154A

„NOTE: Mark the hole that the upper shock links
are mounted in for assembly purposes.

MS155

7-53

7

3. Remove the cap screw and lock nut securing the

upper shock links to the idler arm. Account for a

cap screw, lock nut, spacer, and axle links.

MS156A

MS031

4. Remove the cap screw and lock nut securing the

rear arm to the slide rail. Account for the serrated

axles and axle tube.

ZJ268A

„NOTE: To remove the rear arm, it may be neces-
sary to loosen the rear arm limiter.

ZJ269A

MS028

5. Remove the cap screw and lock nut securing the

rear arm to the idler arm. Account for the alumi-

num axle and bushing assemblies.

MS029A

MS030

7-54

CLEANING AND INSPECTING

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

1. Clean the bearings with a clean cloth.

2. Inspect each idler wheel for cracks or damage.

3. Inspect the bushings (located in the arm pivot

area) for wear or damage.

4. Inspect all welds and the tubing of the upper arm

for cracks or unusual bends.

5. Inspect the two adjusting cams for damage.

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

check for binding or roughness.

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

A. Remove the wheel 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

ASSEMBLING

1. Install the rear arm onto the idler arm with an alu-

minum axle, bushing assemblies, and two cap

screws (coated with blue Loctite #243). Tighten

only until snug.

MS029A

2. Place the rear arm assembly into position between

the slide rails. Secure with a cap screw and lock

nut. Tighten to 40 ft-lb.

MS157

3. With the rear arm secured to the slide rails, tighten

the two cap screws (from step 1) to 45 ft-lb.

! CAUTION

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

7-55

7

MS159

„NOTE: If the rear arm limiter was loosened (after
step 4 of disassembling), treat the threads of the
cap screw with blue Loctite #243 and tighten to 50
ft-lb.

MS158

4. Position the shock links in the appropriate holes of

the idler arm brackets (see Chassis and Skid Frame

Mounting Locations in this section). Place a

spacer between the center of the brackets; then

place a flat washer on the cap screw. Insert the

axle links into the upper shock link eyelets; then

insert the cap screw through the eyelets. Secure

with a cap screw and lock nut. Tighten securely.

MS031

MS026

5. Place the upper shock eyelet with bushings

between the idler arm brackets making sure the

spacer is properly positioned between the brack-

ets. Secure with a cap screw and lock nut. Tighten

securely.

MS160

„NOTE: Do not over-tighten the shock absorber
cap screw as the shock eyelet must be free to
pivot.

739-992A

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

! CAUTION

Make certain that the shock pivot assembly is prop-
erly positioned prior to securing the shock absorber
to the idler arm.