Rocker Arm / Shaft Inspection - Polaris A12MH46AX Service Manual

Tensioner Spring Free Length:
2.02" (5.13 cm)
4. Measure free length of tensioner spring. Replace
spring if excessively worn. Compare to specifications.
5. Replace entire tensioner assembly if any part is worn
or damaged.

Rocker Arm / Shaft Inspection

1. Mark or tag rocker arms to keep them in order for
assembly.
2. Inspect each rocker arm cam follower surface. If there
is any damage or uneven wear, replace the rocker
arm.
NOTE: Always inspect camshaft lobe if rocker arms
are worn or damaged.
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
3. Measure O.D. of rocker shaft. Inspect it for wear or
damage. Compare to specifications.
Rocker Shaft O.D.:
.8656-.8661" (21.987-22.0 mm)
4. Measure I.D. of each rocker arm and compare to
specifications.
5. Measure I.D. of both rocker arm shaft supports and
visually inspect surface. Compare to specifications.
Rocker Arm & Support I.D.:
.8669-.8678" (22.020-22.041 mm)
ENGINE
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