Arctic Cat Sno Pro 120 Service Manual page 105

3. Inspect the connecting-rod bearings by rotating
them. The bearings must rotate freely and must not
bind or feel rough. If a connecting-rod bearing must
be replaced, the connecting rod and crank pin must
also be replaced.
4. Inspect the oil-injection pump drive gear for any
signs of worn or chipped teeth. If either condition
exists, replace the gear.
 NOTE: Lubricate bearings thoroughly prior to
assembly.
REMOVING/INSTALLING OUTER
CRANKSHAFT BEARINGS
 NOTE: The end bearings are not pressed onto the
crankshaft. The bearings can be removed simply by
sliding them off the crankshaft.
Inspect the crankshaft bearing area for wear. If any wear
is noted on either end, replace the crankshaft end.
 NOTE: Install the bearings by sliding each bearing
onto the crankshaft making sure the dowel-pin hole
in the outer race is properly positioned and will align
with its hole and pin in the crankcase.
FC039
REED VALVE ASSEMBLY
1. Inspect the reed valves, stoppers, and valve blocks
for cracks or any deterioration.
FC040
2. Wash the reed valves, stopper, and cage assembly in
parts-cleaning solvent and blow dry.
3. Inspect the reed stopper height. Using a caliper, mea-
sure the distance from the seat to the bottom outer tip
edge of the stopper. Measurement must not exceed
specifications. If measurement is not within specifi-
cations, either bend or replace the reed stopper.
CM161
4. Inspect the reed-to-seat clearance. Using a feeler
gauge, measure the clearance. Clearance must be less
than 0.008 in. If clearance is not within specifica-
tions, replace the reed valve.
2
CM161
CM162
CM163
2-85