Arctic Cat Sno Pro 120 2011, Service Manual

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14. Remove the PTO-side piston-pin circlip from the
PTO-side piston; then remove the MAG-side piston-
pin circlip from the MAG-side piston.
CM149
15. Using Piston Pin Puller, remove the piston pins from
both pistons.

NOTE: For proper assembly, keep all MAG-side
components and all PTO-side components sepa-
rated. Assemble them on their proper sides.
FC029
16. Lift the pistons clear of the connecting rods and
remove the small-end connecting-rod bearings
(account for two washers); then remove the piston
rings. Keep each piston with its rings; keep each pis-
ton pin and bearing together as a set.
CM151
17. Remove the intake flanges and reed valve assem-
blies.
FC030
18. Remove the three cap screws securing the thermostat
cap; then remove the cap, gasket, and thermostat.
FC032
19. Remove the six screws securing the water pump cover
to the crankcase and remove the cover. Account for
the O-ring gasket and the alignment pins.
20. Remove the cap screw securing the water pump
impeller; then slide the impeller free of the shaft.
21. Remove either lower union cap screw securing the
lower check valve assembly; then remove the two
screws securing the oil-injection pump to the crank-
case. Remove the pump, retainer, and O-ring.
FC031
CAUTION
DO NOT use any type of punch to drive the piston pin
free of the piston; damage may result. Use a piston-pin
puller only.
CAUTION
On the 500 cc, place rubber bands over the connecting
rods and around the cylinder studs to prevent the con-
necting rods from damaging the crankcase. On the 600
cc, use rubber hoses to secure the connecting rods.
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