ATV Arctic Cat 2002. Service Manual - part 4

 

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ATV Arctic Cat 2002. Service Manual - part 4

 

 

3

 

TABLE OF

CONTENTS

  

  

  

  

    

! "  

   

#"  

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RepairPro Service Manual

-------------------------------------------------------------------------------------------------------------------------------------------------------------

Engine/Transmission

This section has been organized into sub-sections

which show a progression for the complete servicing

of the Arctic Cat ATV engine/transmission.

To   s e r v i c e   t h e   c e n te r   c r an k c a s e   h a l v e s ,   th e

engine/transmission must be removed from the frame.

To service top-side, left-side, and right-side compo-

nents, the engine/transmission does not have to be

removed from the frame.

„

        

 

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(above)

(140

°

F) @3000 RPM

(below)

0.7 kg/cm  (10 psi)
2.8 kg/cm  (40 psi)

-------------------------------------------------------------------------------------------------------------------------------------------------------------

3-3

3

Specifications*

(375)

CLUTCH

Clutch Release Screw

1/8 turn back

Drive Plate (fiber) Thickness

(min) 2.42 mm (0.094 in.)

Drive Plate (fiber) Tab

(min) 11 mm (0.43 in.)

Driven Plate (warpage)

(max) 0.1 mm (0.004 in.)

Clutch Spring Length

(min) 27.5 mm (1.08 in.)

Clutch Wheel Inside Diameter (max) Scuffing of contact surface

Starter Clutch Shoe

No groove at any part

Clutch Engagement

RPM 1900 µ 200

Clutch Lock-Up

RPM 3400 µ 300

Primary Reduction Ratio

3.150 (63/20)

Secondary Reduction Ratio

1.125 (18/16)

Final Reduction Ratio

(front)

(rear)

3.090 (34/11)
3.647 (62/17)

Secondary-

(super low)

Transmission

(low)

Reduction Ratio

(high)

3.176 (17/18 x 25/11 x 37/25)
1.480 (37/25)
1.112 (11/25 x 18/17 x 43/18)

Gear Ratios

(1st)

(2nd)

(3rd)

(4th)
(5th)

(reverse)

3.083 (37/12)
1.933 (29/15)
1.388 (25/18)
1.095 (23/21)
0.913 (21/23)
2.833 (29/12 x 34/29)

Engine Fork To Groove

(side clearance)

0.10-0.50 mm
(0.004-0.020 in.)

Secondary Transmission Fork

to Groove (side clearance)

0.05-0.50 mm
(0.002-0.020 in.)

Reverse Fork to Groove

(side clearance)

0.10-0.50 mm
(0.004-0.020 in.)

Shift Fork Groove

(#1, #2, & #3)

Width

(secondary transmission -

#1 & #2)

(reverse)

4.5-4.6 mm
(0.177-0.181 in.)
5.45-5.55 mm
(0.215-0.219 in.)
4.0-4.1 mm
(0.157-0.161 in.)

Shift Fork

(#1, #2, & #3)

Thickness

(secondary transmission -

#1 & #2)

(reverse)

4.3-4.4 mm
(0.169-0.173 in.)
5.3-5.4 mm
(0.209-0.213 in.)
3.8-3.9 mm
(0.150-0.154 in.)

Engine Oil

(off

on)

Thermo-Switch

(on

off)

Operating Temperature

160

°

C (320

°

F)

140

°

C (284

°

F)

VALVES AND GUIDES

Valve Face Diameter

 (intake)

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6

Table of Contents

(250/300)

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Removing Engine/ 

Transmission

Many service procedures can be performed without

removing the engine/transmission from the frame.

Closely observe the note introducing each sub-section

for this important information.

Secure the ATV on a support stand to elevate the

wheels.

1. Remove the seat.

2. Disconnect the battery by removing the negative

cable first and then the positive cable.

3. Remove the battery hold-down bracket; then

remove the battery.

4. Drain the oil from the engine/transmission.

„

      !&   

! "$

5. Turn the gas tank valve to the OFF position.

6. Remove the springs securing the exhaust header

pipe to the engine.

7. Loosen the exhaust pipe from the muffler and the

frame; then remove the exhaust pipe. Account for

grafoil gaskets.

8. Mark the position of the hi/low range shifter arm;

then remove the hi/low range shifter arm.

.758)

9. Mark the gear shifter arm; then remove the cap

screw securing the gear shifter arm.

.759)

10. Mark the reverse gear shaft arm to the reverse shift

shaft to aid in installing; then remove the cap

screw securing the reverse gear shaft arm to the

reverse shift shaft.

 AT THIS POINT

,: ;""#!

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-   '  & !!  

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-------------------------------------------------------------------------------------------------------------------------------------------------------------

8

3

/94

11. Remove the cap screws securing the air-intake

snorkel to the frame; then loosen the hose clamp at

the air-cleaner assembly.

12. Loosen the clamps securing the carburetor boots to

the air intake and the engine.

.74)

13. Remove the cap screws securing the air-cleaner

assembly to the rear of the ATV.

.748)

14. Remove the cap screws securing the CDI unit.

/??)

15. Remove the remaining cap screw securing the

air-cleaner assembly to the frame; then remove the

crankcase breather hoses from the air-cleaner

assembly and remove the assembly.

.74?)

16. Route the carburetor assembly up and away from

the engine.

„

 , &

 $ !

  &!

"!$

17. Disconnect the positive cable from the starter

motor.

18. Disconnect the battery ground (negative) cable

from the crankcase cover.

.764)

19. Disconnect the high tension lead from the spark

plug.

RepairPro Service Manual

-------------------------------------------------------------------------------------------------------------------------------------------------------------

?

20. Disconnect the main wiring harness connectors.

.765)

21. Remove the right-hand side panel.

22. Disconnect the oil light switch.

.768)

23. Remove the rear hydraulic brake caliper.

24. Remove the mechanical foot brake.

25. Remove the torx-head screw securing the brake

hose to the upper suspension arm.

26. Remove the two oil cooler hoses from the engine.

27. Remove the skid plate from the rear end assembly.

28. Remove the two lower cap screws securing the

sub-frame/engine assembly to the frame.

.78)

29. Secure the upper rear of the ATV to the support

stand using tie-down straps to help prevent the

ATV from falling forward when the

engine/sub-frame assembly is removed.

30. Place a large floor/transmission jack under the

engine assembly; then remove the upper four cap

screws securing the sub-frame to the frame. Place

the engine assembly on a suitable work stand and

remove the wheels.

.78)

31. Remove the cap screw securing the front engine

mount to the sub-frame. Account for spacers.

32. Remove the upper shock mount cap screw to allow

access for removal of the two rear engine mount

cap screws.

33. Remove the two rear cap screws and flat washers

securing the engine to the sub-frame.

34. Remove the rear upper A-arm cap screws.

35. Using Side Case Puller (p/n 0644-262) with an

adapter, remove each drive axle assembly.

.78?)

! WARNING

%!!  '   :    !!

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&$

-------------------------------------------------------------------------------------------------------------------------------------------------------------

9

3

Top-Side Components

„

  /&  ! "

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„

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Removing Top-Side 

Components

A. Valve Cover
B. Cylinder Head

„

  1"  ! !  

!!@

!

!$

4)

1. Remove the cap screws securing the two tappet

covers; then remove the covers. Account for the

O-rings.

66)

2. Remove the cap screws securing the valve cover to

the head; account for the locations of any rubber

washers on top side cap screws. Remove the valve

cover. Account for the cylinder head plug. Note

the location of two alignment pins.

„

 ,""""&

!#  A

!"" "$

6?)

3. Loosen the cap screw on the end of the chain

tensioner; then remove the two Allen-head cap

screws securing the tensioner adjuster assembly

and remove the assembly. Account for a gasket.

54)

4. Remove the cap screw securing the chain

tensioner pad (account for a washer).

 AT THIS POINT

 " &  ! ! &

  &  ! &  

&$.,%2,

 $

RepairPro Service Manual

-------------------------------------------------------------------------------------------------------------------------------------------------------------

7

8)

5. Bend the washer tabs and remove the two cap

screws securing the sprocket to the camshaft; then

drop the sprocket off the camshaft. While holding

the chain, slide the sprocket and camshaft out of

the cylinder head. Account for an alignment pin.

8)

8)

„

  (!   "  & 

!

$

6. Using an awl, rotate the C-ring in its groove until

it is out of the cylinder head; then remove the

C-ring.

„

         ! 

$

84)

7. Using a pair of needle-nose pliers, remove the

chain tensioner pad.

85)

8. Remove the nuts securing the cylinder head to the

cylinder; then remove the three cylinder head cap

nuts and one nut with copper washers (note

location of the cap nuts and nuts).

86)

-------------------------------------------------------------------------------------------------------------------------------------------------------------

3

88)

9. Remove the cylinder head from the cylinder,

remove the gasket, and account for two alignment

pins.

8?)

10. Remove the cam chain guide.

89)

C. Cylinder
D. Piston

„

  %! 7   !  

!!$

11. Remove the two nuts securing the cylinder to the

crankcase.

12. Lift the cylinder off the crankcase taking care not

to allow the piston to drop against the crankcase.

Account for the gasket and two alignment pins.

„

  ,& & "  

#"&@"

57$

?4)

?)

13. Using an awl, remove one piston-pin circlip.

 AT THIS POINT

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 !     %"

!%! $

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! $

! CAUTION

B"& !!

 !  !"    

!$

RepairPro Service Manual

-------------------------------------------------------------------------------------------------------------------------------------------------------------

?)

14. Using a piston-pin puller, remove the piston pin.

Account for the opposite-side circlip. Remove the

piston.

„

  ,  "   "  !!

!!!$

56)

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A. Starting with the top ring, slide one end of the

ring out of the ring-groove.

B. Remove each ring by working it toward the

dome of the piston while rotating it out of the

groove.

Left-Side Components

„

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3

Removing Left-Side 

Components

A. Recoil Starter
B. Starter Cup
C. Cover/Stator Assembly

1. Remove the cap screws securing the recoil starter

assembly to the left-side cover; then remove the

starter noting the location of the single washer.

Account for the gasket.

2. Remove the nut and lock washer securing the

starter cup to the crankshaft; then remove the

starter cup. Account for the O-ring inside the cup.

3. Lay the engine/transmission on its right side; then

remove the cap screws securing the left-side cover

to the crankcase and note the location of the

different-sized cap screws.

4. Remove the left-side cover w/stator assembly.

Account for a gasket, two alignment pins, and a

starter idler gear spacer.

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5. Remove the nut securing the magneto rotor to the

crankshaft (D).

6. Remove the starter idler gear assembly (E); then

account for the spacer, the starter idler gear, and

shaft.

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RepairPro Service Manual

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4

D. Magneto Rotor
E. Idle Gear Assembly

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7. Install the magneto rotor puller adapter.

48)

8. Using a magneto rotor remover; remove the

magneto rotor assembly (F) from the crankshaft.

Account for the key.

456)

9. Remove the starter clutch gear assembly (G) from

the crankcase.

10. Remove the driven gear assembly (H) w/washer

from the crankcase.

11. Remove the outer drive gear assembly (I)

w/washer from the driveshaft.

12. Remove the short shift shaft (J) from the

crankcase.

13. Remove the short shift fork.

14. Remove the long shift shaft (K) from the

crankcase (4x4).

15. Remove the long shift fork (4x4).

16. Remove the driven gear dog from the

sub-transmission shaft (A).

17. Remove the drive gear dog from the driveshaft

(B).

18. Remove the idler gear and washers from the

countershaft (C). Account for the thick washer on

the inside.

488)

19. Remove the sub-transmission gear cam (M) from

the crankcase.

20. Remove the circlip and washer from the

sub-transmission shaft (A); then remove the driven

gear assembly (H). Account for a washer.

21. Remove the inner drive gear circlip from the

driveshaft (B); then remove the inner drive gear

and washer from the driveshaft. Account for a

bushing and a spacer. Note the location of the oil

hole in the bushing for installing purposes.

486)

22. Remove the Phillips-head screws securing the

shift-indicator sending unit; then remove the

sending unit. Account for an O-ring, neutral

contact, and spring.

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5

3

489)

Right-Side Components

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Removing Right-Side 

Components

A. Cover

1. Turn the gas tank valve to the OFF position and

lay the ATV on its side; then remove the cap

screws securing the right-side cover to the

crankcase. Remove the cover. Note the locations

of the long cap screw and rubber washer and the

two wire forms. Account for the gasket and for

two alignment pins.

4)

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B. Release Roller Assembly
C. Starter Clutch Shoe
D. Starter Clutch Housing
E. Primary Driven Clutch

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2. Slide the clutch release arm and gear shift shaft out

of the crankcase; then in a crisscross pattern,

remove the four cap screws securing the clutch

release roller assembly.

44)

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RepairPro Service Manual

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6

45)

3. Remove the release roller assembly. Account for

four springs.

4. Remove the starter clutch-shoe nut (left-hand

threads) and washer from the driveshaft; then

using a clutch shoe remover, remove the clutch

shoe.

46)

48)

5. Remove the primary drive one-way clutch; then

remove the starter clutch housing.

6. Using a clutch sleeve hub holder to hold the clutch

hub, remove the nut and washer.

4?)

7. Scribe a line across the primary driven clutch to

aid in assembly.

49)

8. Remove the primary driven clutch assembly from

the countershaft. Account for the sleeve and

washers.

47)

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