Camshaft Inspection; Exhaust Camshaft Decompression Mechanism - Polaris RANGER 500 2018 Service Manual

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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.

Replace camshafts if damaged or if any part is worn

past the service limit.

Camshaft Lobe Height:

Intake: 1.5704" ± 0.0038" (39.89 ± 0.097 mm)

Exhaust: 1.5405" ± 0.0038" (39.13 ± 0.097 mm)

9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual

ENGINE / COOLING SYSTEM

EXHAUST CAMSHAFT DECOMPRESSION

Removal of the decompression mechanism is not

necessary unless replacement is required.

1. Thoroughly clean and inspect the decompression

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.

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