Arctic Cat Sno Pro 120 2011, Service Manual

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ZJ075

NOTE: Rotate the crankshaft one revolution to ver-
ify free movement.
13. With the O-ring lubricated with engine oil, install the
oil-relief valve.
ZJ076A

NOTE: Prior to installing the oil-relief valve, make
sure the valve is free and clear of any contaminants.
14. With proper bearings selected, install the counterbal-
ancer bearing halves into the upper engine case; then
apply a light film of engine-assembly grease to the
bearing surfaces.
15. Rotate the crankshaft to the bottom-dead-center posi-
tion; then install the rear counterbalancer with the
two dots (A) on the face of the crankshaft and bal-
ancer gears directly in line with each other at the
sealing surface of the engine case.

NOTE: The front counterbalancer has the oil pump
drive gear.
741-596A
16. With the crankshaft at bottom-dead-center, install the
front counterbalancer with the single dot (B) on the
face of the crankshaft and balancer gears directly in
line with each other at the sealing surface of the
engine case.
17. Place the oil-passage O-rings (A) into place in the
upper engine case; then install the three alignment
pins (B) into the case.
ZJ042A
ZJ042B
18. Install the separator plates to the lower crankcase;
then using the torque pattern shown, secure with
eight cap screws. Tighten to 84 in.-lb.
741-737A
19. Install the crankshaft and counterbalancer bearing
halves to the lower crankcase; then apply a light film
of engine-assembly grease to the bearing surfaces.

NOTE: Make sure the bearings are properly seated
to the grooves of the crankcase.
20. Using Three Bond Sealant, apply a light film of seal-
ant onto the sealing surfaces of the upper and lower
engine cases.
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