Balance Shaft Installation; Lower Crankcase Preparation - Polaris RZR XP Service Manual

ENGINE / COOLING SYSTEM

BALANCE SHAFT INSTALLATION

1. Clean the upper crankcase balance shaft bearing
bore surfaces.
2. Align tab of new balance shaft bearings with the slot
in each bearing bore of crankcase. Press bearing
insert firmly into place.
3. Rotate the crankshaft until the alignment dot on the
crankshaft MAG end gear is visible.
4. Apply Polaris PS-4 engine oil to both balance shaft
journals.
3.90
5. Install the balance shaft, placing the tooth with the
alignment dot in-line with the dot on the crankshaft
gear.

LOWER CRANKCASE PREPARATION

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
assembling the crankcase.
9929419 R02 - 2018-2019 RZR XP / XP 4 Turbo S Service Manual
NOTE
are clean and dry
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before