Arctic Cat Sno Pro 120 2011, Service Manual

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ZJ054A

NOTE: Prior to installing the jets, make sure the ori-
fices are clear of any debris or contaminants.
ZJ055A
7. With the proper bearings selected, install the half-
bearings into the upper engine case; then lubricate
the bearing faces liberally with engine-assembling
grease taking care not to get any grease between the
engine case and bearing.

NOTE: Make sure the tabs of the bearings are prop-
erly seated to the notches in the upper engine case.
ZJ069A
8. Lubricate the lips of the crankshaft seal with grease
and install the crankshaft seal over the PTO end of
the crankshaft with the spring side of the seal
directed toward the crankshaft; then install the crank-
shaft.

NOTE: Position the crankshaft at bottom-dead-cen-
ter for assembling purposes.
ZJ053
9. Lubricate the thrust bearings with engine oil; then
with the grooved side of the bearings (A) facing out-
ward towards the crankshaft counterweights, install
the first bearing and roll it into place. Push the crank-
shaft towards the installed bearing and install the
remaining bearing.
ZJ074A
10. Install the bearing halves to the connecting rods and
caps; then lubricate the bearing surfaces and con-
necting rod journals of the crankshaft.
11. Seat the connecting rods to the crankshaft; then
install the rod caps and cap screws and tighten only
until snug.
12. Alternately, tighten each of the connecting rod cap
screws evenly to 25 ft-lb; then in turn tighten each
cap screw an additional 90° turn to obtain the final
recommended torque value.
CAUTION
Prior to lubricating the bearings and journals, make
sure all surfaces are cleaned thoroughly and dried with
compressed air to avoid contaminants between the
bearings and shaft surface.
CAUTION
Failure to install the crankshaft thrust bearings properly
could result in severe engine damage.
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