Arctic Cat 450 2010, Service Manual

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3-47
3
FI639B

NOTE: Be sure to apply sealant to the inside
radius of all cap screw locations and the entire
surface of the internal cap screw bosses.
FI639C
2. Using a plastic mallet, lightly tap the case halves
together until cap screws can be installed.
3. From the right side, install the crankcase cap
screws noting the location of the different-sized
cap screws; then tighten only until snug.

NOTE: Rotate the shafts back and forth to ensure
no binding or sticking occurs while tightening the
cap screws.
MD1008
4. From the left side, install the remaining crankcase
cap screws; then tighten only until snug.

NOTE: Rotate the shafts back and forth to ensure
no binding or sticking occurs while tightening the
cap screws.
CC871
5. In a crisscross pattern, tighten the 8 mm cap
screws until the halves are correctly joined; then
tighten to 21 ft-lb.

NOTE: Rotate the shafts back and forth to ensure
no binding or sticking occurs.
6. In a crisscross pattern, tighten the 6 mm cap
screws to 10 ft-lb.

NOTE: Rotate the shafts back and forth to ensure
no binding or sticking occurs.
Installing
Engine/Transmission
1. From the left side, place the engine into the frame
(rear of engine first) tilting the rear up to allow
cylinder head to clear frame.
2. With engine moved rearward, engage the splines
of the front driveline into the front output drive
yoke; then move into position and install the two
through-bolts. Secure with lock nuts and tighten to
35 ft-lb.
3. Install the four cap screws securing the rear driveline
to the output drive flange and tighten to 20 ft-lb.
4. Connect coolant hoses (A) and (B) to the water
pump and connect the upper coolant hose to the
thermostat housing. Tighten all clamps securely.

AT THIS POINT
After completing center crankcase components, pro-
ceed to Installing Right-Side Components, to Install-
ing Left-Side Components, and to Installing Top-Side
Components.
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