3
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
3.125
1. Remove the stator cover (Refer to “Stator Cover
Removal” page 3.121)
2. Remove the two oil pump sprocket bolts and
washers. Discard the bolts and replace with new for
assembly. Remove the sprockets and chain from the
engine.
3. Inspect the oil pump chain for worn or missing rollers
or damage. Chain should be replaced as a set with
sprockets if sprocket teeth are worn.
NOTICE
The larger oil pump sprocket
s
mounts to the balance
shaft extension, the smaller oil pump sprocket
d
mounts to the oil pump shaft.
4. Remove the upper oil pump sprocket spacer.
5. Remove the three bolts securing the oil pump cover
to the crankcase.
6. Grasp the oil pump shaft and pull it outward to
remove the shaft, oil pump cover and inner oil pump
geroter. This will prevent the oil pump drive pin from
falling out and into the crankcase.
NOTICE
The gerotor set has two orientation dots that must be
installed inward upon assembly
(Figure 1 on the next page).
7. Remove the center geroter, pin and shaft from the oil
pump cover.
NOTICE
There is a spacer
f
in between the inner oil pump
geroter and the oil pump cover.
8. Remove the oil pump geroter that is in the engine
case (if needed).
9. Clean the geroters to remove oil.
ENGINE / COOLING SYSTEM
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