Snowmobile Arctic Cat 2-Stroke (2007 year). Manual - part 100

8-20

FS264

2. Remove the cover and spring.

FC055

FS265

3. Remove the cam arm pin lock nuts; then using a

small torch, apply heat to the cam arm set screws

to loosen the Loctite used in assembly.

FS001

„NOTE: Heat must be applied to the cam arm in
order to remove the set screws.

4. After the lock nuts and set screws have been

removed, remove the cam arm pins one at a time

noting the position of the alignment notches for

assembly purposes. Account for the O-rings.

0739-038

Cleaning And Inspecting

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

1. Using parts-cleaning solvent, wash grease, dirt,

and foreign matter off all components; dry with

compressed air.

2. Remove any drive belt dust accumulation from the

stationary sheave, movable sheave, and bushings

using parts-cleaning solvent only.

3. Inspect stationary sheave, movable sheave, spider,

and cover for cracks or imperfections in the cast-

ing.

4. Inspect the cam arm pins for wear or bends.

5. Inspect the spring for proper compression rate

qualities (see Drive System Components in this

section).

6. Inspect rollers for damage or wear.

Assembling

1. With the head of each cam arm pin positioned

towards the direction of the drive clutch rotation,

install the cam arms.

„NOTE: The drive clutch rotates counterclock-
wise.

2. With the cam arm pin properly positioned, apply

green Loctite #620 to the set screw holes in the

cam arm, install the new set screws (pre-coated

with Loctite), and tighten securely.

8-21

8

739-040A

3. Secure the cam arm pins with new lock nuts and

tighten to specifications.

4. Place the spring and cover into position making

sure the timing mark on the cover is properly

aligned; then compress the spring and install the

machine screws coated with blue Loctite #243 and

lock washers. In a crisscross pattern, tighten

evenly to specifications.

MS402A

FS266A

FC091

FS267

Installing

„NOTE: Before installing the drive clutch, be sure
to wipe both the crankshaft taper and clutch
mounting taper clean using a clean towel.

1. Place the drive clutch into position on the crank-

shaft and secure with the appropriate cap screw

and lock washer. Tighten to specifications.

„NOTE: On the four-roller style to aid in proper
tightening of the drive clutch cap screw, apply oil
to the threads of the cap screw prior to installing.

2. Check alignment between the drive clutch and

driven pulley (see appropriate Drive Clutch/

Driven Pulley in this section).

! CAUTION

It is critical that green Loctite #620 be applied to the
set screw holes in the cam arms or component dam-
age may occur.

! CAUTION

When installing cam arms, always use new lock nuts
and cam arm set screws.

! CAUTION

Care must be taken when installing the cover not to
damage the bushing.

! CAUTION

When installing the drive clutch, do not tighten the
cap screw with any kind of impact tool. Tighten cap
screw using a hand torque wrench only. Failure to
do so could result in stationary sheave damage.

8-22

AF468D

MS390

3. Install the drive belt. Check drive belt deflection

(see appropriate Drive Clutch/Driven Pulley in

this section). Secure the belt guard and install the

plug in the belly pan.

4. Either test drive the snowmobile or run the engine

for five minutes; then verify the drive clutch cap

screw torque specification.

Roller Driven Pulley

 (STD)

REMOVING

1. Open the hood; then open the belt guard.

2. Remove the drive belt.

3. Remove the cap screw and washer securing the

driven pulley; then account for and note the posi-

tion of any alignment washers.

SC013D

4. Slide the driven pulley off the driven shaft; then

remove pulley from the engine compartment.

„NOTE: If the driven pulley is tight on the shaft,
pull the driven pulley off using the Driven Pulley
Puller (p/n 0744-023).

5. Remove the key, alignment washers, and stub

shaft from the driven shaft.

AF120D

DISASSEMBLING

1. Scribe a line across all driven pulley components

to ensure correct assembly and pulley balance.

SC001D

2. Place the driven pulley on a work fixture so the

roller plate is directed upward.

! WARNING

Never operate the engine without the belt guard/side
panel secured.

8-23

8

SC002D

„NOTE: To aid in driven pulley servicing, use a roll
of duct tape as a work fixture. The work fixture will
increase the stability of the pulley during the repair
procedure.

3. Remove the three lock nuts securing the roller

plate; then carefully slide the plate off the station-

ary shaft allowing the spring to release tension.

SC003D

4. Remove the spring.

B458D

5. Slide the movable sheave off the stationary shaft;

then remove any thrust washers located between

the sheaves noting the position of washers for

assembling purposes.

B459D

B460

6. Remove the three socket head screws and lock

washers securing the torque bracket (cam) to the

stationary sheave; then remove torque bracket.

AI062

7. Place the roller plate on a work fixture (roll of duct

tape, etc.).

SC004D

! WARNING

The roller plate is under spring pressure. Care must
be taken when removing the lock nuts to prevent the
plate from ejecting prematurely.