Piston And Crankshaft Assembly - Polaris 340 LX 2007 Service Manual

Engine Systems

Piston and Crankshaft Assembly

BEARING
THRUST WASHER
RETAINING RING
Disassembly / Assembly Process
CAUTION
Wear eye protection when removing or installing piston
c-clips.
1. Using a small, flat-blade screwdriver, remove the c-
clips. Discard the c-clips.
2. Remove the piston pins using the piston pin puller, PN
2870386.
3. When replacing a piston, always replace the rings, c-
clips, pins and needle bearings with new parts.
4. Inspect the crankshaft as outlined in the Engine
Inspection section within this chapter.
5. Install the piston rings with the beveled edge facing
5.22
PISTON RINGS
PISTON
C CLIP
CONNECTING ROD
BEARING
PTO CRANKWEB
CTR CRANKWEB
9923396 - 2007-2012 EDGE/Widetrak LX Service Manual
©2011 Polaris Sales Inc.
PISTON PIN
NEEDLE BEARING
NEEDLE BEARING
MAG CRANKWEB
upwards.
6. The piston ring locator pins and ring open-ends
always face the intake-side of the engine.
7. Always lubricate the piston assembly and cylinder
with two-stroke engine oil when installing the cylinder
over the piston.
Fastener Torque
62 - 70 ft.lbs.
Flywheel Nut
(83 - 95 Nm)
ROD PIN
FLYWHEEL KEY
BEARING
WASHER
FLYWHEEL NUT
Note
Flywheel and
crankshaft tapers
to be clean and
dry.