Lower Crankcase Preparation; Crankcase Assembly - Polaris 2015 RZR 900 Service Manual

ENGINE / COOLING SYSTEM
5. Install the balance shaft, placing the tooth with the
alignment dot in-line with the dot on the crankshaft
gear.

Lower Crankcase Preparation

NOTE: Always replace plain bearings when the
crankcase or connecting
disassembled. Refer
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.
3.68
rods have been
to bearing selection
9925723 R01 - 2015 RZR 900 Service Manual
© Copyright 2014 Polaris Industries Inc.

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
shaft bearings 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. Apply a thin, continuous film of Crankcase Sealant
(PN 2871557) to upper crankcase mating surface
Do not allow sealant to dry before assembly.
NOTE: DO NOT block oil passages
crankcase sealant.
and new balance
1
.
with