Snowmobile Arctic Cat (2008 year). Manual - part 92

6-12

4. Using a stiff ruler centered between the drive

clutch and driven pulley, push down on the drive

belt just enough to remove all slack. Note the

amount of deflection on the ruler at the bottom of

the straightedge. The deflection should be within

the range of 25-31 mm (1-1 1/4 in.).

„NOTE: Push down on the belt with the ruler only
until the bottom of the belt flexes upward; then
read the amount of deflection.

5. To correct drive belt deflection, washers can be

removed or added between the stationary and

movable sheaves of the driven pulley.

„NOTE: If the drive belt deflection is above specifi-
cations, the snowmobile will bog and lack power at
clutch engagement. For good performance, proper
belt deflection is critical.

6. Secure the belt guard.

ACT Roller Driven Pulley

 

(Crossfire/F-Series/M-Series)

REMOVING

1. Remove the drive belt.

„NOTE: For removing drive belt, see Removing/
Installing Drive Belt (ACT Roller Driven Pulley) in
this section.

2. Using a 9/16-in. socket and extension, remove the

cap screw securing the driven pulley to the driven

shaft.

3. Slide the driven pulley off the driven shaft.

„NOTE: Account for and remove any alignment
washers. These washers must be used during
installing.

DISASSEMBLING

1. Prior to disassembling, mark the driven pulley

sheaves and torque bracket.

CM060

2.  Place the driven pulley on the Driven Pulley Com-

pressor; then install the compressor flange spacer

and wing nut and compress the driven pulley

spring.

FS090

3. Remove the torx-head cap screws securing the

movable sheave to the pulley.

CM061

„NOTE: To loosen the torx-head cap screws, it
may be necessary to insert a torx-bit and strike
each screw with a hammer.

4. Release the compression of the spring by remov-

ing the wing nut; then remove the movable sheave.

Account for the spacer (retainer). 

 

FS093

6-13

6

FS094

„NOTE: Note the location of the holes in the
spacer for assembling purposes.

5. Remove the stationary sheave; then remove the

plastic washer (spring seat) and the spacer.

CM062

6. Remove the spring.

CM063

7. Remove the remaining spring seats.

CM064

„NOTE: Premature wear will result if the plastic
washer is not installed during assembling.

CLEANING AND INSPECTING

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

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

belt dust, and foreign matter off all components.

2. Inspect the rollers for damage, cracks, or wear.

3. Inspect the sheaves for any gouges, cracks, or

other damage. Also, inspect threaded areas of

sheaves for damaged or stripped threads.

4. Inspect the torque bracket for cracks or damage.

The ramp portions of the bracket must be free of

gouges and damage. Minor scratches may be

repaired using #320 grit wet-or-dry sandpaper.

5. Inspect spring for distortion, crystallization, or

breaks.

6. Inspect the rollers, pins, and spring mounting

holes for cracks, damage, or wear.

7. Inspect the cover and movable sheave bearings for

wear. For each respective bearing, measure the

outside diameter of the shaft and the inside diame-

ter of the bearing. Compare the readings. Clear-

ance between the shaft and the respective bearing

must not exceed 0.5 mm (0.020 in.). If the clear-

ance exceeds the specification, the bearing must

be replaced.

„NOTE: The movable sheave bearing is a non-ser-
viceable component.

! CAUTION

Do not use steel wool or a wire brush to clean driven
pulley components. A wire brush or steel wool will
cause the sheaves to be gouged (thus, the drive belt
may not slide properly between sheaves). Decreased
performance and possible accelerated drive belt
wear will result.

6-14

FS121

FS122

FS123

REPLACING TORQUE BRACKET 
BEARING/COVER BEARING

1. Remove the snap ring.

2. Using a suitable driving tool, drive the bearing out.

3. Install the new bearing; then secure with the snap

ring.

REPLACING ROLLERS

1. Drive the spring pins through the stationary sheave

until there is enough room to drive out the cam

roller pin.

FS101

2. Using an Allen wrench and a flat-blade screw-

driver, press the roller pin out of the stationary

sheave.

CM065

„NOTE: Once the roller pin is exposed, it may be
necessary to use a pair of vise-grips to remove the
pin.

FS105

3. Place the new roller into position and tap the roller

pin in far enough to install the spring pin.

! WARNING

Always wear safety glasses when using the bearing
driver.

! CAUTION

Care must be taken not to damage the driven pulley
shaft. 

6-15

6

CM066

CM067A

4. Tap the spring pin back into place.

CM068A

ASSEMBLING

1. Place the torque bracket onto the Driven Pulley

Compressor; then place the spring and plastic

washer (spring seat) into position.

CM063

2. Install the spring seats onto the torque bracket.

CM064

„NOTE: Premature wear will result if the plastic
washer is not installed.

3. Noting the alignment marks made during disas-

sembling and with the spring seat and spacer on

the stationary sheave shaft, place the stationary

sheave onto the torque bracket.

CM062

4. Place the spacer (retainer) into position on the sta-

tionary sheave noting the proper location of the

holes from disassembling.