Page 229 - Manual_Polaris_RZR_ProXP-20-21

ENGINE / COOLING SYSTEM

5. Install the balance shaft, placing the tooth with the CRANKCASE ASSEMBLY
alignment dot in-line with the dot on the crankshaft
gear. 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

LOWER CRANKCASE PREPARATION

NOTICE
Always replace plain bearings when the crankcase or 3. Apply Polaris PS-4 engine oil to the new bearings
connecting rods have been disassembled. Refer to installed in the lower crankcase half.
bearing selection procedures.
4. Clean crankcase mating surfaces to remove any oil.
1. Remove all traces of crankcase sealant from the 5. Align tab of new main bearings e and new balance
crankcase mating surfaces. Inspect the surfaces shaft bearings r with the slot in each bearing bore of
closely for nicks, burrs or damage. the upper crankcase. Press bearing inserts firmly into
place.
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.
6. Apply Polaris PS-4 engine oil to the new bearings
installed in the upper crankcase half.

9930583 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual 3.85
© Copyright Polaris Industries Inc.