Engine Disassembly; Cam Chain Tensioner / Rocker Arm /Camshaft Removal; Cam Chain Tensioner Inspection - Polaris A12MH46AX Service Manual

ENGINE

ENGINE DISASSEMBLY

Cam Chain Tensioner / Rocker Arm /
Camshaft Removal
1. Remove ignition timing inspection plug from recoil
housing.
TDC "T" Mark
Rotation
To position crankshaft at Top Dead Center (TDC) on
compression stroke:
2. Rotate engine slowly in the direction of rotation
watching intake valves open and start to close.
3. Continue to rotate engine slowly, watching camshaft
sprocket marks and the mark in the timing inspection
hole.
3.18
Advance Marks
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
4. Align single (TDC) mark on flywheel with projection in
inspection hole, and the cam sprocket pin (facing
upward) aligned with the camshaft to crankshaft
center line.
NOTE: The cam lobe should be pointing down and
valves should have clearance at this point.
5. Remove cam chain tensioner plug, sealing washer,
and spring. CAUTION: The plug is under spring
tension. Maintain inward pressure while removing.
6. Remove the two 6x25 mm cam chain tensioner flange
bolts.
7. Tap lightly on tensioner body with a soft face hammer
and remove tensioner.

Cam Chain Tensioner Inspection

1. Pull cam chain tensioner plunger outward to the end
of its travel. Inspect teeth on ratchet pawl (A) and
plunger teeth (B) for wear or damage.
A
2. Push ratchet pawl and hold it. The plunger should
move smoothly in and out of the tensioner body.
3. Release ratchet pawl and push inward on plunger. It
should remain locked in position and not move inward.
B