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9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales 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.
NOTE: 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 (PU-50563) can be installed
into the slots of the camshafts as shown below. This
will set TDC of the compression stroke.
NOTE:
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.
4.
Insert a 1/4” drive socket extension through the
crankcase and into the crankshaft locating hole.
This
will set TDC, but not necessarily TDC of the
compression stroke.
View the timing marks on the
cam shaft sprockets to ensure the engine is at TDC
of the compression stroke.
ENGINE
