Snowmobile Arctic Cat (2006 year). Instruction - part 20

76

MAINTENANCE

4. Remove the wear bar from the

ski and account for the location

of the bushings (if applicable).

Installing Ski Wear Bars

1. If applicable, place the bushings

onto the studs; then move the

wear bar into position on the

bottom of the ski.



NOTE: If installing a double-off-

set wear bar, the carbide edge
must be directed to the outside of
the ski.

2. Align the wear bar studs with

the holes in the ski; then install

the washers (if applicable) and

lock nuts. Tighten to 1.5-2.1 kg-

m (11-15 ft-lb).

ADJUSTING SKI STANCE 
(M-Series/King Cat/Bearcat 570 
Models)

1. Place the front of the snowmo-

bile on a support stand.

2. Remove the cotter pin; then

remove the slotted nut and cap

screw securing the ski assembly

to the spindle. Remove the ski.

Account for the rubber damper,

inserts, and washers.

3. To increase ski stance 2.5 cm (1

in.), place both ski stance spac-

ers to the outside of the spindle.

4. To decrease ski stance 2.5 cm (1

in.), place both ski stance spacers

to the inside of the spindle.

5. Position the ski over the saddle.
6. Apply a low-temperature grease

to the non-threaded portion of

the cap screw; then slide the cap

screw through the ski and sad-

dle accounting for the rubber

damper, inserts, and washers.



NOTE: Install the cap screw so

the slotted nut will be located to
the inside of the ski.

7. Apply red Loctite #271 to the

threads of the cap screw; then

tighten the nut to 6.2 kg-m (45

ft-lb).

8. Place the cotter pin into the ski

cap screw and spread the pin.

9. Repeat procedure for the other

ski.

RAIL WEAR STRIPS

Arctic Cat recommends that the

wear strips be checked weekly and

replaced as necessary. Measure the

wear strips at 25.4 cm (10 in.) inter-

vals. Wear strips must be 10.7 mm

(0.42 in.) thick or thicker. If wear

strip measurements are less than

specified, replacement of both wear

strips is necessary to prevent prema-

ture track clip wear and possible

track damage. Take the snowmobile

to an authorized Arctic Cat Snow-

mobile dealer for this service. This

service is at the discretion and

expense of the snowmobile owner.
Each time a new set of wear strips

are installed, they should be tem-

pered. Temper the wear strips by

driving the snowmobile for approxi-

mately a mile on a hard pack trail;

then immediately drive into deep

snow and allow the wear strips to

cool. Repeat the procedure (warm-

ing up the wear strips; then cooling

them down) two or three times.



 NOTE: The rail wear strips will

wear rapidly if the snowmobile is
operated on terrain on which the
snow cover is minimal. Loose
snow  is required to cool  and
lubricate the wear strips and pre-
vent accelerated wear.

MAINTENANCE

77

0727-726

AXIAL FAN BELT (370/440 cc 
Models)

Arctic Cat recommends that the con-

dition of the axial fan belt be

inspected monthly.

1. Be sure ignition key is in the

OFF position.

2. Lift the hood and remove the

screws securing the fan cover;

then remove the fan cover.

3. Inspect axial fan belt for cracks,

wear, and proper tension.

726-155A

4. Using the thumb and forefinger,

check the tension (tightness) of

the fan belt by squeezing the

belt together near mid-span.

The maximum belt deflection

must not exceed 6 mm (1/4 in.).



 NOTE: If the axial fan belt is

damaged or if the belt deflection
exceeds the specification, take
the snowmobile to an authorized
Arctic Cat Snowmobile dealer for
repair or adjustment. This service
is at the discretion and expense
of the snowmobile owner.

5. Install the fan cover.

ACCESSORY BELT (660 cc 
Models)

Arctic Cat recommends that the con-

dition of the accessory belt be

inspected monthly.

Checking Belt Tension

1. Be sure ignition key is in the

OFF position.

2. 

On the standard models,

remove the air cleaner assem-

b l y ;   o n   t h e   t u r b o   m o d e l s,

remove the intercooler assem-

bly.

3. Remove the  bolts securing the

belt guard to the engine; then

remove the belt guard from the

engine compartment.

4. Inspect the belt for cracks,

wear, and proper tension.

! WARNING

DO NOT inspect the axial fan
belt while the engine is running.
Contact with the axial fan belt,
fan blades, or other moving
p a r t s   m a y   c a u s e   p e r s o n a l
injury.

!WARNING

DO NOT inspect the belt while
the engine is running. Contact
with the belt, pulleys, or other
moving parts may cause per-
sonal injury.

78

MAINTENANCE

5. Using the thumb, check the ten-

sion (tightness) of the belt by

pressing down on the belt near

mid-span. The maximum belt

deflection must not exceed 9

mm (0.35 in.).

0736-564

Adjusting Belt Tension

1. Remove the bolts securing the

belt guard to the engine; then

remove the belt guard from the

engine compartment.

2. On the alternator, loosen, but do

not remove, the tension bolt (A)

and the pivot bolt (B).

0736-553

3. Insert a wooden pry bar (such

as a hammer handle) between

the engine and the alternator,

pry the alternator away from the

engine, and tighten the acces-

sory belt.

4. When the accessory belt is ten-

sioned properly (see Accessory

Belt in this sub-section), tighten

the tension bolt (A) to 2.4 kg-m

(17 ft-lb).

5. Tighten the pivot bolt (B) to 5.1

kg-m (37 ft-lb).

6. Place the belt guard into posi-

tion and secure with the bolts.

7. On the standard models, install

the air cleaner assembly; on the

turbo models, install the inter-

cooler assembly. 

PERFORMANCE TIPS

79

PERFORMANCE TIPS

Operating a high performance snow-

mobile requires a special attention that

is not required by a low performance

snowmobile. Often, a minor adjust-

ment will result in a large increase in

performance. This section is intended

to highlight minor conditions that

adversely affect performance and the

adjustments needed to correct them.

Be sure, however, to thoroughly read

and understand this entire manual

especially the section on spark plugs,

track tension and alignment, and sus-

pension.

DRIVE BELT

 — This link between

the engine and drive train is often the

most neglected component. The drive

belt must have the proper fit in the

drive clutch and driven pulley. Proper

fit is when the top surface of the drive

belt is flush with the top or up to 1/16

in. higher than the driven pulley

sheaves (with the sheaves fully

closed). If the belt sits below this

level, the snowmobile will bog at slow

speeds and will have a slower maxi-

mum speed. To correct this condition,

first determine if the drive belt is

within specifications (see Drive Belt

section) and replace if worn or too

long. Secondly, it may be necessary to

remove a shim washer from between

the driven pulley sheaves to allow the

driven pulley to close tighter. On the

ACT roller driven pulley, adding shim

washers will decrease belt deflection

and removing shim washers will

increase belt deflection. Available

shim washers from Arctic Cat are p/n

0648-714 (0.090 in.), p/n 0648-715

(0.030 in.), and p/n 0648-716 (0.060

in.). See an authorized Arctic Cat

Snowmobile dealer for this service.

Finally, always run the drive belt in

the same direction. Installing the drive

belt so the part number can be read

will ensure that the drive belt is

always run the same direction.

DRIVE CLUTCH AND DRIVEN

PULLEY

 — Keeping the drive

clutch and driven pulley clean should

be the primary consideration of the

operator. The clutch sheaves can be

cleaned of any drive belt accumula-

tion using a clean cloth and parts-

cleaning solvent. All pivot points can

be maintained clean using compressed

air.
The setting of the driven pulley pre-

load will vary the peak engine rpm.

Peak engine rpm is the rpm at which

the engine develops its maximum

horsepower. Optimum snowmobile

performance will result if the engine

rpm (full throttle) is within 3% of the

specifications. To increase the peak

rpm, increase the spring tension of the

driven pulley by moving the spring

end clockwise. To decrease the peak

rpm, decrease the spring tension of the

driven pulley by moving the spring

end counterclockwise. Each hole posi-

tion will change the peak engine rpm

by approximately 200 rpm. On the

ACT roller driven pulley, spring ten-

sion is adjusted using Spring Adjust-

ment Tool (p/n 0644-413). 

CARBURETOR MAIN JET(S)

(Carbureted Models) — Proper carbu-

retion is absolutely necessary to

obtain peak performance. Since ambi-

ent temperature and operating altitude

both affect the main jet size needed for

optimum engine performance, the

main jet(s) MUST be changed when-

ever the temperature changes 20° F or

whenever operating altitude varies by

more than 1000 feet. The Main Jet

Chart beneath the hood of the snow-

mobile identifies the proper main

jet(s) to use under all operating tem-

peratures and altitudes. Follow the

Main Jet Chart carefully to obtain

peak engine performance and avoid

engine damage.