3
9850068 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.
3.79
CRANKSHAFT MAIN BEARING
SELECTION
In order to select the proper main bearings for the
crankshaft, you must reference the six numbers on the
crankcase and match that up with the main journal letters
on the crankshaft. Reference Bearing Selection
Identification page 3.78
For example, you would use the number 2 as the
crankcase codes (case journals
q
,
w
,
e
,
r
). The
stamping on the crankshaft reads ABBCBA (crank
journals
q
,
e
,
t
,
y
). Based off the bearing selection
chart, you would use:
Blue bearing for Main #1
u
Green bearing for Main #2
i
Green bearing for Main #3
o
Blue bearing for Main #4
a
BEARING SELECTION CHART — MAIN BEARINGS
Crankshaft
Case
Code A B C
1 Blue Blue Green
2
Blue Green Yellow
3 Green Yellow Yellow
UPPER CRANKCASE PREPARATION
IMPORTANT
Always replace plain bearings when the crankcase or
connecting rods have been disassembled. Refer to
bearing selection procedures.
1. Remove all traces of crankcase sealer from the
crankcase mating surfaces. Inspect the surfaces
closely for nicks, burrs or damage.
2. Clean bolt hole threads to remove any oil or
crankcase sealant.
3. Inspect crankcase bearing bores. Replace the
crankcase assembly if a bearing bore is galled or if
bearing inserts have rotated in the case.
4. Be sure alignment pins are in place where used.
5. Refer to Oil Flow Chart page 3.6 at the beginning of
this chapter and trace the oil paths through the
crankcase and cylinder.
6. Flush all oil passages with solvent and then warm
soapy water. Rinse with clear, warm water and dry
with compressed air.
7. Be sure passages are clean and dry before
assembling the upper crankcase.
ENGINE / COOLING SYSTEM
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