Page 168 - Manual Oficina Polaris RS1 2018 e 2019

ENGINE / COOLING SYSTEM

BALANCE SHAFT INSTALLATION LOWER CRANKCASE PREPARATION
1. Clean the upper crankcase balance shaft bearing
bore surfaces. NOTE
Always replace plain bearings when the crankcase or
2. Align tab of new balance shaft bearings q with the
slot in each bearing bore of crankcase. Press connecting rods have been disassembled. Refer to
bearing insert firmly into place. 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 “Engine 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.
3. Apply Polaris PS-4 engine oil to both balance shaft
journals w. 7. Be sure passages are clean and dry before
assembling the crankcase.

4. Rotate the crankshaft until the alignment dot e on
the crankshaft MAG end gear is visible.
5. Install the balance shaft, placing the tooth with the
alignment dot r in-line with the dot on the crankshaft
gear (see reference images below).

3.82 9928689 - 2018 RZR RS1 Service Manual
© Copyright Polaris Industries Inc.