Arctic Cat Sno Pro 120 Service Manual page 102

19. Turn the engine upside down on support blocks and
remove the coolant temperature sensor (if neces-
sary).
20. With its bottom side up on two support blocks,
remove the cap screws securing the crankcase
halves.
21. Separate the crankcase halves by installing two
crankcase cap screws in opposite corners leaving the
heads approximately 1/4 in. out. Using a plastic ham-
mer and lifting on the ends of the crankshaft, tap on
each cap screw head until the case halves separate.
Remove the cap screws.
CAUTION
DO NOT drive any tool between halves to separate the
crankcase. Damage to the sealing surfaces will result.
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22. Lift the bottom half of the crankcase off the top half.
Care must be taken to not allow the connecting rods to
drop onto the sealing surface of the bottom case half.
23. Lift the crankshaft free from the top half of the
crankcase and slide the crankshaft oil seals off the
crankshaft. Account for the C-ring. Remove the
bearing retaining pins and account for the crankcase
dowel pins.
 NOTE: The end bearings are not pressed onto the
crankshaft. After removing the seals, use care not to
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allow the bearings to slide off the crankshaft.
24. Remove the oil-injection pump/water pump drive-
shaft from the lower crankcase half. Account for the
thrust washer on the outer end of the shaft.
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 NOTE: When replacing the inner water pump seals,
use the recommended Water Pump Bearing and Seal
Tool Kit only.
25. Place the crankcase on the bench with the water
pump side down. Using the long seal driver, drive the
mechanical water pump seal from the crankcase.
26. Using a pair of snap ring pliers, remove the snap ring
securing the inner seal in the crankcase.
27. Using the hooked end of the tool, pull the inner seal
free of the crankcase.
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28. Using the hooked end of the tool, pry the seal ring
from the backside of the water pump impeller.
CAUTION
CM159A
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