Snowmobile Arctic Cat (2008 year). Manual - part 89

5

5-37

SERVO2

6-1

6

SECTION 6 — DRIVE TRAIN 

AND BRAKE SYSTEMS

TABLE OF

CONTENTS

Drive Train and Brake Systems ............................... 6-2
Drive Belt................................................................. 6-2
Drive Clutch............................................................. 6-2
Roller Driven Pulley (STD) ...................................... 6-5
Drive Clutch/Driven Pulley (STD) .......................... 6-10
ACT Roller Driven Pulley

(Crossfire/F-Series/M-Series) ............................ 6-12

Drive Clutch/Driven Pulley

(Crossfire/F-Series/M-Series/T-Series) .............. 6-17

Removing/Installing Drive Belt

(ACT Roller Driven Pulley) ................................. 6-18

Drive Train/Brake Disc (Standard w/Reverse) ....... 6-19
Drive Train/Brake Disc (F-Series/T-Series)............ 6-27
Drive Train/Brake Disc (Crossfire/M-Series).......... 6-41
Brake System (Hydraulic)...................................... 6-55
Brake Lever/Master Cylinder Assembly

(Hydraulic System - Bearcat 570) ...................... 6-69

Brake Lever/Master Cylinder Assembly 

(ACT).................................................................. 6-71  

Brake System (Panther 370) ................................. 6-72
Brake Control (Panther 370).................................. 6-79
Troubleshooting Drive Clutch/Driven Pulley .......... 6-82
Troubleshooting Drive Belt .................................... 6-83
Troubleshooting Hydraulic Brake System.............. 6-84

6-2

Drive Train and

Brake Systems

This section has been organized into sub-sections for

servicing drive train and brake systems; however,

some components may vary from model to model. The

technician should use discretion and sound judgment

when removing and installing components.

„NOTE: Some illustrations and photographs used
in this section are used for clarity purposes only
and are not designed to depict actual conditions.

„NOTE: Critical torque specifications are located
in Section 1 of this manual.

SPECIAL TOOLS

A number of special tools must be available to the

technician when servicing the drive train and brake

systems.

„NOTE: Special tools are available from the Arctic
Cat Service Parts Department.

Drive Belt

The belt dimensions and construction are two factors

that influence the performance of the drive system.

The two belt dimensions that are important to the per-

formance of the snowmobile are the outside circumfer-

ence and the width. Both of these dimensions will

influence shifting characteristics.

If the drive belt is longer than specified, the drive

clutch and driven pulley will not have the full shift

ratio. Also, a too-long drive belt will cause poor accel-

eration and a decrease in top speed.

If the drive belt is shorter than specified, the drive

clutch and driven pulley will have a different shift pat-

tern because they are in different ratios from those for

which they were originally matched. A too-short drive

belt will cause a loss in performance and a bog on

engagement.

„NOTE: A drive belt that is worn thin may produce
the same effect as one that is too long.

Drive belt construction has an influence on the way the

drive clutch and driven pulley will shift and on the

amount of power that will be transmitted through the

system. ONLY ARCTIC CAT DRIVE BELTS

SHOULD BE USED. Different brands of belts may

not have the same construction causing either more

friction or more slippage when the belt is wedged

between the sheaves and, thus, a loss of efficiency.

„NOTE: A stiff belt causes a HP loss to the track.
As a belt warms up, it gets more flexible and trans-
mits power with less HP loss.

Drive Clutch

 

CHANGING CAM ARMS/SPRINGS

Removing

1. Remove the drive belt.

2. Remove the cap screw and lock washer securing

the drive clutch to the crankshaft.

„NOTE: Before installing the clutch puller, apply
oil to the threads of the puller and a small amount
of grease to the tip of the puller.

3. Using the Clutch Puller and a breaker bar and the

Drive Clutch Spanner Wrench, tighten the puller.

If the drive clutch will not release, sharply strike

the head of the puller. Repeat this step until the

clutch releases.

4. Remove the drive clutch from the engine compart-

ment.

Disassembling

„NOTE: Note the timing marks on the cover, spi-
der, and movable sheave. These must be aligned
when assembling the drive clutch for balance pur-
poses.

1. Loosen the machine screws securing the cover.

Remove every other cap screw and lock washer

from the cover; then while firmly holding the

cover, remove the three remaining screws and lock

washers equally.

Description

p/n

Bearing Removal and Installation Tool 

 0644-167 

Brake Disc Socket Wrench 

 0644-481

Clutch Alignment Bar 

 0644-427 

Clutch Alignment Bar 

 0644-496 

Clutch Alignment Bar 

 0644-509 

Clutch Alignment Bar 

 0644-320 

Clutch Puller

0644-207

Drive Clutch Spanner Wrench

0644-136

Driven Pulley Compressor 

 0644-444 

Driven Pulley Puller 

 0744-023 

Driven Pulley Puller 

 0644-469 

Parallelism Bar 

 0644-509 

Rear Suspension Spring Tool 

 0144-311

Reverse Gear Adjustment Gauge 

 0644-244

Roller Pin Removal Tool

0644-276

6-3

6

FC054

2. Remove the cover and spring.

FC055

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 Sec-

tion 1 of this manual).

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.