Arctic Cat Sno Pro 120 2011, Service Manual

Page: 325 / 535

6-2
Drive Train/Track/Brake
Systems
This section has been organized into sub-sections for ser-
vicing drive train, track, 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 techni-
cian when servicing the drive train, track, and brake sys-
tems.

NOTE: Special tools are available from the Arctic
Cat Service Parts Department.
Drive Belt
The belt dimensions and construction are two factors
influencing the performance of the drive system. The two
belt dimensions that are important to the performance of
the snowmobile are the outside circumference 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 acceleration 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 pattern
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 thinly-worn drive belt 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 sys-
tem. ONLY ARCTIC CAT DRIVE BELTS SHOULD BE
USED. Different brands of belts may not have the same
construction causing either more friction or more slip-
page 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 transmits
power with less HP loss.

NOTE: When installing a new drive belt, see After
Brake-In Checkup - Drive Belt Brake-In in Section 1.
REMOVING
1. Turn ignition key to the OFF position and wait for all
moving parts to stop.
2. Set the brake lever lock.
3. Open the left-side access panel; then remove the belt
guard.
4. Remove the cap screw, lock washer, washer, and
sheave adjuster from the end of the driven pulley.

NOTE: Assure that the shims and O-ring are not
removed from the adjuster.
0743-395
5. Remove the cap screw (w/lock washer and washer)
from the adjuster, remove the washer and lock
washer from the cap screw, turn the adjuster around
(reverse it), and insert the cap screw into the adjuster.
Description p/n
Drive Belt Deflection Tool 0644-412
Drive Clutch Bolt Tool 0644-281
Driven Shaft Bearing Removal/Installation Tool 0644-516
Bearing Removal and Installation Tool 0644-167
Brake Disc Socket Wrench 0644-481
Clutch Alignment Bar 0644-496
Drive Clutch Puller 0744-062
Drive Clutch Spanner Wrench 0644-136
Driven Pulley Compressor Tool 0644-444
Driven Pulley Puller 0644-469
Clutch Alignment Bar (Parallelism) 0644-509
Rear Suspension Spring Tool 0144-311
Reverse Gear Adjustment Gauge 0644-244
Roller Pin Removal Tool 0644-276
Gear Case Drain Fitting 0644-552
CAUTION
Never attempt to substitute any other drive clutch
puller for the recommended puller or severe clutch
damage will occur.
Manual
Table of Contents