Camshaft Removal - Polaris A12MH46AX Service Manual

ENGINE
6. Subtract rocker shaft O.D. from rocker arm & shaft
support I.D. This is the oil clearance. Compare to
specifications.
Rocker Shaft Oil Clearance:
Std: .0008 - .0021" (.020 - .054 mm)
Limit: .0039" (.10 mm)
7. Inspect rocker adjuster screws for wear, pitting, or
damage to threads of the adjuster or locknut. Replace
all worn or damaged parts.
NOTE: The end of the adjuster screw is hardened
and cannot be ground or re-faced.

Camshaft Removal

1. Remove thermostat housing.
2. Remove camshaft sprocket inspection cover.
3. Loosen three camshaft sprocket bolts.
4. Remove camshaft end cap and O-ring.
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9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
5. Inspect camshaft end cap (thrust face) for wear.
Replace if worn or damaged.
6. Place a clean shop towel in the area below cam chain
sprocket and remove sprocket retaining bolts.
7. Slide camshaft inward to allow removal of cam
sprocket and remove sprocket from camshaft and
chain.
8. Secure cam chain with a wire to prevent it from falling
into the crankcase.
9. Inspect cam sprocket teeth for wear or damage.
Replace if necessary.
Inspect for Areas of Tooth
Sprocket teeth
Wear or Damage