Crankcase Assembly - Polaris 340 LX 2007 Service Manual

Engine Systems

Crankcase Assembly

CRANKCASE SEAL
LOWER CRANKCASE
Disassembly / Assembly Process
1. Remove the blower housing assembly, oil pump,
flywheel and magneto, and cylinders from the
crankcase assembly. Discard all gaskets and o rings.
2. Remove engine mount plate fasteners from the lower
crankcase.
3. Remove the crankcase fasteners. Thoroughly clean
the fasteners to remove any locking agents.
4. Discard both crankshaft seals.
5. Thoroughly clean the two crankcase mating surfaces
and the inner crankcases. Inspect for cracks. Verify
both crankcase drain screws are securely installed.
6. Apply a thin bead of Three Bond 1215 to both
crankcase mating surfaces.
7. Lubricate the oil pump drive gear with two-stroke
engine oil and install into crankcase.
5.28
IMPULSE HOSE FITTING
9923396 - 2007-2012 EDGE/Widetrak LX Service Manual
©2011 Polaris Sales Inc.
CRANKCASE DRAIN SCREW
8. Install crankshaft and two new crankcase seals. Verify
seal lips face the inside of the engine. Ensure
crankshaft retaining ring and bearing locating pins are
seated correctly before installing upper crankcase.
9. Torque crankcase fasteners to specified torque and
sequence outlined at beginning of chapter.
Fastener Torque
15 - 18 ft.lbs.
Crankcase
(20 - 25 Nm)
CRANKCASE SEAL
Note
Apply Three Bond
1215 to
crankcase mating
surfaces.