Snowmobile Arctic Cat (2008 year). Manual - part 21

2-21

2

MD0277

MD0067

9. Remove the rubber insulator grommet from the

crankcase; then remove two Phillips-head cap

screws securing the ignition timing sensor.

MD0075

MD0074

10. Remove the three Allen-head cap screws securing

the stator and remove it along with the timing sen-

sor; then carefully pull the wires through the hole

in the crankcase.

MD0072

MD0076

11. Remove the four Allen-head cap screws securing

the stator plate. Remove the stator plate.

MD0255

MD0078

2-22

12. Remove the four cap screws securing the seal

retainer plate on the PTO-side; then remove the

plate.

MD0081

13. Remove the spark plugs.

MD0083

14. Remove the eight cap screws, two nuts, and two

washers securing the cylinder head to the cylin-

ders; then remove the cylinder head. Discard the

cylinder head gasket.

MD0289

15. Remove the four 6 mm nuts and eight 10 mm nuts

securing the cylinders to the crankcase.

„NOTE: Using a felt-tip marker, mark the cylinders
as to MAG-side and PTO-side for assembling.
Also, mark the pistons at this time.

MD0087

MD0086

16. Remove the cylinders making sure to support the

pistons so they are not damaged. Account for four

dowel pins.

MD0230

! CAUTION

When removing a cylinder, make sure to support the
piston so it will not be damaged.

2-23

2

MD0096

17. Using an awl, remove the outside piston-pin cir-

clip and remove the piston pin using Piston Pin

Puller taking care not to drop the piston-pin bear-

ing washers into the crankcase.

MD0094

„NOTE: The open sides of the piston pin bearing
washers face inward.

MD0251

MD0208

„NOTE: If the existing rings will not be replaced
with new rings, note the location and top side of
each ring for proper installation. When replacing
with new rings, replace as a complete set only.
When replacing rings note notches in ring ends
which correspond with locating pins in ring
grooves on intake side of the piston. This prevents
the rings from turning on the piston when assem-
bled.

MD0272

MD0271

18. Remove the two Allen-head cap screws securing

the oil-injection pump; then remove the pump.

Account for an O-ring.

2-24

MD0090

MD0092A

19. Remove the oil-injection pump driveshaft retainer.

Account for an O-ring.

MD0100A

20. Remove the oil-injection pump driveshaft.

Account for a thrust washer.

MD0101

21. Place the crankcase (with its bottom side up) on

two blocks of wood. Remove the 12 cap screws

securing the crankcase halves. Note the position of

the different-sized cap screws.

22. Separate the crankcase halves by installing two of

the cap screws in opposite corners leaving the heads

approximately 1/4 in. out. Using a plastic mallet,

tap on each cap screw until the crankcase halves

separate. Account for four dowel pins.

MD0283

MD0204

23. Remove the two cap screws; then remove the

crankshaft assembly from the upper crankcase half

making sure to hold both ends of the crankshaft to

keep the bearings and seals from falling off.

Account for bearings and a C-ring.

! CAUTION

To prevent damage to the crankshaft, crankshaft
bearings, or seals, be sure to always lift the crank-
shaft from both ends.