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ENGINE / COOLING
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9924096 - 2013 RANGER RZR XP 900 / RZR XP 4 900 Service Manual
© Copyright 2012 Polaris Sales Inc.
5. Install the balance shaft, placing the tooth with the
alignment dot (C) in-line with the dot (B) on the
crankshaft gear (see reference images below).
Lower 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 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” 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 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 (A) and new balance
shaft bearings (B) with the slot in each bearing bore
of the lower crankcase. Press bearing inserts firmly
into place.
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