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9926806 R03 - 2015 - 2016 RANGER ETX / 570 2-SEAT 2015 - 2016 RANGER 570 CREW Service Manual
© Copyright Polaris Industries Inc.
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.
NOTE
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
NOTE
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.
ENGINE / COOLING SYSTEM
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