9850043 R01 - 2017-2021
RANGER
500 / 570 Service Manual
© Copyright Polaris Inc.
3.95
CAMSHAFT INSPECTION
Inspect all main journals and cam lobes as described
below and compare to specifications. Replace camshafts
or cylinder head if worn beyond service limit or if any
surface is pitted or damaged.
1.
Visually inspect each cam lobe for wear or damage.
2.
Measure the height of each cam lobe from the base
circle to highest point on the lobe using a
micrometer. Compare to specification.
NOTICE
Replace camshafts if damaged or if any part is worn
past the service limit.
MEASUREMENT
Camshaft Lobe Height:
Intake: 1.5704" ± 0.0038" (39.89 ± 0.097 mm)
Exhaust: 1.5405" ± 0.0038" (39.13 ± 0.097 mm)
EXHAUST CAMSHAFT DECOMPRESSION
MECHANISM
NOTICE
Removal of the decompression mechanism is not
necessary unless replacement is required.
1.
Thoroughly clean and inspect the decompression
mechanism
q
located on the exhaust camshaft.
2.
Replace
the
decompression
assembly
if
any
excessive wear or binding is evident.
3.
Be sure the decompression mechanism functions
smoothly and easily returns under spring pressure to
the resting position against gravity.
Summary of Contents for RANGER 500 2017
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