Polaris R09VA17AA, Service Manual, Page: 82 / 187

3.38
ENGINE
Piston Installation
1. Install a new circlip on one side of the piston with the end
gap facing up or down.
2. Apply clean engine oil all components before assembly.
Generously lubricate the connecting rod (both ends) and
crankshaft main bearing area.
3. Install the wrist pin and piston onto the connecting rod .
IMPORTANT: Install the piston on the connecting rod
with the ’IN” casting mark facing the intake side of engine.
The piston pin should be a push fit into the piston.
4. Install the other circlip with the gap facing up or down. (See
note with Step 3 above). Push the piston pin in both
directions to make sure the clips are properly seated in the
groove.
5. Place the dowel pins in the PTO side of the crankcase and
install a new cylinder base gasket.
6. Lubricate the piston and rings with assembly lube and
install a ring compressor on the piston assembly.
Verify
that the ring gaps are 120 degrees apart from each other
before installation
.
CAUTION
Do not re-use circlips. Circlips become
deformed during the removal process. Do not
compress the new clip more than necessary to
prevent loss of radial tension. Severe engine
damage may result if circlips are re-used or
deformed during installation.
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