Arctic Cat Sno Pro 120 Service Manual page 109

6. Place the PTO-side crankshaft bearing into position
making sure the bearing retaining pin hole is posi-
tioned inward.
 NOTE: The bearing retaining pin hole is the hole
that doesn't go entirely through the bearing case.
7. Lubricate the inner lips of the crankshaft oil seals
with grease; then slide the seals onto the crankshaft
making sure the spring side of each seal faces the
center of the crankshaft.
8. Apply oil to the crankshaft bearings; then install the
crankshaft into the upper crankcase half. Be sure the
alignment hole in each bearing is positioned over its
respective dowel pin in the crankcase; then seat the
crankshaft.
 NOTE: To check the bearing for proper position,
place the point of a sharp tool into the dimple found
in the bearing race. Strike the tool with the palm of
the hand in either direction. If the bearing moves, it
isn't positioned correctly and must be rotated until it
drops onto the dowel pin.
CAUTION
If the bearings are not properly seated during assembly,
the crankcase halves will not seal tightly and severe
engine damage will result.
9. Position the two center seal rings with their end gaps
180° apart (up on one and down on the other); then
apply a thin coat of High-Temp Sealant to the entire
bottom half of the crankcase sealing surface.
 NOTE: At this point if the coolant temperature sen-
sor was removed, install the sensor (threads coated
with white Loctite #575) and tighten to 18 ft-lb.
CM043A
10. Assemble the crankcase halves making sure the
crankshaft gear and oil-injection pump driveshaft
gears mesh. Rotate the crankshaft one full turn to
align the crankshaft gear and pump driveshaft.
11. Install the crankcase cap screws securing the crank-
case halves.
12. Tighten the 6 mm cap screw to 96 in.-lb, the 8 mm
cap screws to 18 ft-lb, and the ten 10 mm cap screws
in two steps from 13 ft-lb to 37 ft-lb using the pattern
shown.
CM045A
 NOTE: After tightening the crankcase, turn the
engine right side up and tighten the four MAG-hous-
ing cap screws in a crisscross pattern to 18 ft-lb.
CM036A
2
FC071
0738-201
2-89