9850067 R01 - 2020-2021
GENERAL
/
GENERAL XP
Service Manual
© Copyright Polaris Inc.
3.39
CRANKCASE INSPECTION
1.
Remove the oil drain diverter
q
from the upper
crankcase.
2.
Remove all traces of crankcase sealer from the
crankcase mating surfaces. Inspect the surfaces
closely for nicks, burrs or damage.
3.
Be sure alignment pins are in place where used.
4.
Be sure oil passages are clean and free of any
cleaning solvent (see Chapter 3 – Engine Oil Flow
Chart page 3.7).
5.
Remove and discard the plain bearings located in
the upper crankcase
w
, lower crankcase
e
and
connecting
rods
r
.
Replace
the
crankcase
assembly if a bearing bore is galled or if bearing
inserts have rotated in the case. Refer to bearing
selection procedures upon assembly.
NOTICE
Always replace plain bearings when the crankcase or
connecting rods have been disassembled. Refer to
Bearing Selection Identification Letters and Numbers
CYLINDER INSPECTION
1.
Lay a straight edge
q
across the top surface of the
cylinder at several different points and measure warp
by inserting a feeler gauge between the straight
edge and the cylinder surface. If warp exceeds the
service limit, replace the cylinder.
MEASUREMENT
Cylinder Warp Limit:
.002″ (0.05 mm)
2.
Inspect cylinder for wear, scratches, or damage.
NOTICE
DO NOT hone the cylinders or attempt to repair a
damaged cylinder by honing.
