Piston / Connecting Rod Assembly - Polaris ACE 900 2017 Service Manual

4. Install second ring with marking facing top of piston
y
. Rotate ring to position the end gap toward intake
side of piston as shown below.\
5. Install top ring with mark facing top of piston
Rotate ring to position the end gap toward exhaust
side of piston as shown below.
6. Be sure top and second rings rotate freely in their
grooves and do not bind when compressed by hand.

PISTON / CONNECTING ROD ASSEMBLY

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.
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
ENGINE / COOLING SYSTEM
2. Install a new circlip
at the top (12:00 position) or bottom (6:00 position).
u
.
Never re-use a piston pin circlip.
If reinstalling the original connecting rods, orientate the
rods the same as when removed. If new connecting
rods are being installed, they can be installed either
way (there is no piston pin offset in the rod), however it
is recommended they be installed with rods facing the
same direction.
w
3. Place piston on connecting rod
r
pin through rod and piston until it seats against
the installed circlip.
Do not tap on pin or cause any sideways force to
connecting rod. Warm piston crown with a heat gun if
pin cannot be installed by hand, or use a piston pin
installation tool.
DO NOT apply heat to piston rings or a loss of radial
tension could result.
q
on one side of piston with gap
NOTICE
e
. Push piston
CAUTION
3.71
3