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9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales Inc.
MAG Side Crankcase Bearing Service
Bearing Removal
1.
Support the crankcase and drive, press, or extract
the balance shaft bearing (2) with a blind bearing
remover.
WARNING
The MAG side crankshaft plain bearing(1) is not
serviceable. Crankcase replacement is required if the
bearing is damaged or has excessive wear. The
crankshaft is reusable if it meets specifications and
MAG side bearing surface is not groved, pitted,
damaged or excessively worn.
Due to extremely close tolerances and minimal wear,
the bearings must be inspected visually, and by feel.
Look for signs of discoloration, scoring or galling. Turn
the inner race of each bearing. The bearings should
turn smoothly and quietly. The outer race of each
bearing should fit tightly in the crankcase. The inner
race should be firm with minimal side to side movement
and no detectable up and down movement.
Bearings are stressed during the removal process and
must not be re-used!
Installation
2.
Clean all bearing bores and inspect for excessive
wear.
3.
Lubricate all bearing bores with clean engine oil.
4.
Fully seat the
new
balance shaft bearing until
bottomed in the bearing bore.
Oil Pickup Assembly Inspection
The oil pickup assembly is located inside of the oil pan.
1.
Remove fastener that retains oil pickup.
2.
Pull and twist to remove the oil pickup assembly from
the crankcase.
3.
Inspect the assembly for cracks and excessive wear.
Replace if necessary.
4.
Thoroughly clean the pickup assembly.
5.
Press the pickup assembly into the crankcase until
fully seated in bore.
6.
Install fastener that retains the oil pickup; torque to
specification.
WARNING
Do Not Exceed Torque Value.
Oil Pickup:
59.75 in-lbs ± 6 in-lbs (6.75 Nm ± 0.7 Nm)
Oil Pressure Regulator (Bypass) Valve
Inspection
The oil pressure regulator (bypass) valve is located in the
MAG side crankcase (B).
ENGINE
