Polaris RANGER 500 2018 Service Manual page 186

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ENGINE / COOLING SYSTEM

1. Remove the stator cover (Refer to "Stator Cover

Removal", page 3.104)

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

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.

The larger oil pump sprocket

shaft extension, the smaller oil pump sprocket

mounts to the oil pump shaft.

mounts to the balance

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.

The gerotor set has two orientation dots that must be

installed inward upon assembly

7. Remove the center geroter, pin and shaft from the oil

There is a spacer

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.

9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual

(Figure 1 on the next page).

in between the inner oil pump

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