Arctic Cat Sno Pro 120 2011, Service Manual

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CONNECTING-ROD SMALL END
BORE
1. Insert a snap gauge into each connecting-rod small
end bore; then remove the gauge and measure it with
a micrometer.
AN061
2. The diameter measurement must be within 1.0631-
1.0634 in. for the 800 cc or 1.1418-1.1422 in. for the
1000 cc.
CRANKSHAFT RUNOUT
0742-727
1. Using the V Blocks, support the crankshaft on the
surface plate.

NOTE: The V blocks should support the crankshaft
on the outer bearings.
2. Mount a dial indicator and base on the surface plate.
Position the indicator contact point against the crank-
shaft location point A (PTO-end) from the crankshaft
end. Zero the indicator and rotate the crankshaft
slowly. Note the amount of crankshaft runout (total
indicator reading).

NOTE: For runout location point specifications, see
Crankshaft Runout/Repair Specifications in Section 1
of this manual.
3. Position the indicator contact point against the crank-
shaft location point B (MAG-end) from the crank-
shaft end. Zero the indicator and rotate the
crankshaft slowly. Note the amount of crankshaft
runout (total indicator reading).
FC046
4. Position the indicator contact point against the crank-
shaft at location point C (center). Zero the indicator
and rotate the crankshaft slowly. Note the amount of
crankshaft runout (total indicator reading).
5. If runout exceeds 0.002 in. at any of the checkpoints,
the crankshaft must be either straightened or
replaced.
Assembling

NOTE: The use of new gaskets and seals is recom-
mended when assembling the engine.

NOTE: Prior to assembling the engine, use parts
cleaning solvent and compressed air and thoroughly
clean the threaded holes of the crankcase and cylin-
ders to properly tighten.

NOTE: When the use of a lubricant is indicated, use
Arctic Cat Synthetic APV 2-Cycle Oil.
1. Apply a thin coat of grease to the inner seal lips of
the water pump seal.
2. Using the seal driver, position the inner water pump
shaft seal onto the seal driver and gently tap the seal
down into position.

NOTE: Grease must be applied to the lips of the
inner seal before installation.
MS986A
! WARNING
Always wear safety glasses when drying components
with compressed air.
Manual
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