3.18
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
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
stroke.
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
PU-50563
NOTICE
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
crankshaft.
ENGINE / COOLING SYSTEM
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