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9850068 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.
3.85
5. Install the balance shaft, placing the tooth with the
alignment dot in-line with the dot on the crankshaft
gear.
LOWER CRANKCASE PREPARATION
NOTICE
Always replace plain bearings when the crankcase or
connecting rods have been disassembled. Refer to
bearing selection procedures.
1. Remove all traces of crankcase sealant 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. Ensure passages are clean and dry before
assembling the crankcase.
CRANKCASE ASSEMBLY
1. Check to be sure the PTO crankshaft seal is resting
properly in the upper crankcase.
2. Align tab of new main bearings
q
and new balance
shaft bearings
w
with the slot in each bearing bore of
the lower crankcase. Press bearing inserts firmly into
place.
3. Apply Polaris PS-4 engine oil to the new bearings
installed in the lower crankcase half.
4. Clean crankcase mating surfaces to remove any oil.
5. Align tab of new main bearings
e
and new balance
shaft bearings
r
with the slot in each bearing bore of
the upper crankcase. Press bearing inserts firmly into
place.
6. Apply Polaris PS-4 engine oil to the new bearings
installed in the upper crankcase half.
ENGINE / COOLING SYSTEM
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