Arctic Cat 660 cc, Service Manual

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8-5
8
739-267B
8. Place the drive belt (so the part number can be
read) between the sheaves of the drive clutch first;
then between the sheaves of the driven pulley.
9. Using the deflection tool, remove the sheave
adjuster from the end of the driven pulley.
10. Place the shim washers and O-ring (as noted in
removing) onto the sheave adjuster; then carefully
thread the sheave adjuster back into the driven
pulley. Tighten the adjuster securely using the
deflection tool.
11. Close the belt guard; then install the driven pulley
plug.
12. Release the brake lever lock.
Drive Clutch
CHANGING CAM ARMS
(9-Post Style)
The cam arms on the drive clutch can be changed
without disassembling the clutch. To change the cam
arms, use the following procedure.
1. Check to make sure the ignition switch is in the
OFF position.
2. Remove the drive belt.
3. Compress the movable sheave approximately 2.5
cm (1 in.) and while holding it in this position,
insert a flat bar firmly between the bottom side of
the spider and the inner surface of the movable
sheave. Slowly release the movable sheave.
4. Remove the lock nuts from the three cam arm
pins.
5. Remove the cam arm pins one at a time; then
remove the cam arm with bushing and account for
the washers.
„
NOTE: When installing cam arms, always use
new lock nuts. Make sure the head of each cam
arm pin is positioned towards the direction of
drive clutch rotation. Tighten nuts until they con-
tact the shoulder of the cam arm pin; then tighten
an additional 1/8 turn.
733-452B
6. Change the cam arms and secure with new lock
nuts and existing pins making sure the head of
each pin is positioned toward the direction of drive
clutch rotation.
„
NOTE: The drive clutch rotates counterclock-
wise.
CHANGING CAM ARMS (6-Post Style)
The cam arms on the drive clutch can be changed
without disassembling the clutch. To change the cam
arms, use the following procedure.
1. Check to make sure the ignition switch is in the
OFF position.
2. Remove the drive belt.
„
NOTE: For removing drive belt on models with
the ACT Roller Driven Pulley, see Removing/
Installing Drive Belt in this section.
3. Using Clutch Compressor (p/n 0644-420),
compress the movable sheave inward; then insert
the compressor clamp and slowly release the
compressor locking the movable sheave.
! WARNING
Never operate the snowmobile without the belt
guard secured in place.
! WARNING
Do not run the engine with the drive belt removed
or the bar in the clutch.
KEY
1. Lock Nut
2. Cam Arm
3. Bushing
4. Washer
5. Pin