Setting Tdc (Top-Dead-Center) - Polaris RANGER 500 2017 Service Manual

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ENGINE / COOLING SYSTEM

SETTING TDC (TOP-DEAD-CENTER)

There are three ways to ensure the piston is at TDC.

Remove the outer clutch cover to access the drive clutch

to aid in engine rotation (manually turn the drive clutch

counter clockwise).

1. With the CPS sensor removed, rotate the engine

until the "V" marked on the flywheel is aligned with

the CPS mounting hole. This will set TDC, but not

necessarily TDC of the compression stroke. View

the timing marks on the camshaft sprockets to

ensure the engine is at TDC of the compression

2. With the valve cover and thermostat housing

removed, rotate the engine so the cam lobes are

facing outward and the Cylinder Holding and

Camshaft Timing Plate can be installed into the slots

of the camshafts as shown below. This will set TDC

of the compression stroke.

Camshaft Timing Plate

Intake cam sprocket should have "I" marks aligned with

gasket surface and the exhaust cam sprocket should

have "E" marks aligned with gasket surface.

3. With the stator cover and flywheel removed, rotate

the engine and position the piston at TDC by aligning

the timing hole in crank case with a timing hole in the

9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual

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