Page 180 - Manual Oficina Polaris Sportsman 570 2014 a 2016

ENGINE / COOLING SYSTEM

PISTON / CONNECTING ROD ASSEMBLY CAUTION
DO NOTapply heat to piston rings or a loss of
IMPORTANT
radial tension could result.
If installing the piston onto the connecting rod, you
cannot use special tools: PV-43570–1 (Piton Ring
Compressor Pliers) and PA-51457 (Piston Ring Band)
to compress the rings when installing the cylinder. The
rings must be fitted into the cylinder by hand.

1. Lubricate connecting rod small end, piston pin bore
and piston pin with engine oil.
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.
5. Install the remaining circlip q with gap at the 12:00
2. Install a new piston circlip q into the MAG (stator) position. Push the piston pin in both directions to
side of piston with the gap at the 12:00 position. make sure the clips are properly seated in the
3. When installing the piston, the piston marking “∆” is groove.
points towards the MAG (stator) side of the engine.

CYLINDER INSTALLATION – PISTON IN-
STALLED ON CONNECTING ROD
1. Clean base gasket sealing surface on cylinder and
crankcase to remove all oil, grease, or old sealant.

2. Install a new base gasket.

4. Place piston w on connecting rod r. Install piston
pin e through connecting rod r and piston until it
seats against the previously installed piston circlip.
NOTE
Do not tap on pin or cause any sideways force to
connecting rod. Warm piston crown with a heat gun if NOTE
pin cannot be installed by hand, or use a piston pin Base gasket and surfaces must be dry and oil free.
installation tool. Match gasket and deck profiles during assembly. If
gasket is installed incorrectly, it will hang over the edge
of the crankcase.
3. Apply clean engine oil to cylinder bore and bottom
tapered portion of cylinder sleeve.

3.58 9926803 R06 - 2014-2016 Sportsman 325 / ETX / 450 HO / 570 Service Manual
© Copyright Polaris Industries Inc.