Piston Ring Installation; Piston Installation - Polaris Hawkeye Repair Manual

PISTON RING INSTALLATION

NOTE: Apply clean engine oil to all ring surfaces and ring
lands. Always check piston ring installed gap before rings
are installed on piston. If the piston has been in service,
clean any accumulated carbon from the ring grooves and
oil control ring holes.
1. Place the oil control ring expander in oil ring groove
with the end gap facing forward. The expander has no
up or down marking and can be installed either way.
The ends should butt squarely together and must
not overlap.
2. Install the oil ring top rail with the end gap at least 30
from the end of the expander.
3. Install the bottom rail with the gap at least 30
end of the expander on the side opposite the top rail
gap.
4. Install the second ring with the mark facing up. The
second ring has an undercut with a tapered face.
Position the end gap toward the rear (intake) side of
the piston.
5. Install the top ring with the marking facing up. The top
ring has an inner bevel with a barrel face.
Top Ring:
Bevel on Inner Edge
Second Ring
Mark Faces UP
6. Verify proper installation of rings by checking to be
sure the top and second rings rotate freely in the
groove when compressed by hand.

PISTON 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 ra-
dial tension. Severe engine damage may result if
circlips are re-used or deformed during 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 to the piston rings, ring lands,
- www.instant-manuals.com -
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from the
Install with
mark UP
piston pin bore, piston pin, and piston skirt. Lubricate
the connecting rod (both ends) and crankshaft main
bearing area.
3. IMPORTANT- Install the piston on the connecting
rod with the valve pocket facing the intake side of
engine. The piston pin should be a push fit into the
piston.
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4. Install the other circlip with the gap facing up or down.
Push the piston pin in both directions to make sure the
clips are properly seated in the groove.
5. Lubricate the piston and rings with engine oil and
install a ring compressor on the piston assembly.
Verify that the ring gaps are 120
each other before installation.
ENGINE
Pocket
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- 180 apart from
3.39