3
9926806 R03 - 2015 - 2016 RANGER ETX / 570 2-SEAT 2015 - 2016 RANGER 570 CREW Service Manual
© Copyright Polaris Industries Inc.
3.47
CAMSHAFT SPROCKET INSPECTION
NOTE
Camshaft sprocket removal is not necessary unless the
replacement of the sprockets is required.
Inspect cam sprocket teeth for wear or damage. Replace
timing chain and sprockets as a set if worn or damaged.
NOTE
Replace intake camshaft sprocket bolt if loosened or
removed.
TORQUE
Intake & Exhaust Camshaft Sprocket Bolt:
14 ft-lbs (19 Nm)
CAMSHAFT INSPECTION
Inspect all cam lobes as described below and compare
to specifications. Replace camshafts 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: 1.30" (33.10 mm)
Exhaust: 1.291" (32.80 mm)
EXHAUST CAMSHAFT DECOMPRESSION
MECHANISM
NOTE
Removal of the decompression mechanism is not
necessary unless replacement is required.
The decompression mechanism consists of screw
q
,
domed washer
w
, flyweight
e
, and spring
r
.
ENGINE / COOLING SYSTEM
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