Crankshaft Removal; Crankshaft / Cam Chain / Sprocket Inspection - Polaris Hawkeye Repair Manual

CRANKSHAFT REMOVAL

1. Lift the crankshaft and balance shaft from the left
case.
2. Note the number and thickness of any shims installed
on either shaft.
NOTE: Crankshaft and balance shaft end play must
be measured and adjusted with shims if any new
components are installed (bearings, crankcase,
crankshaft, or balance shaft. See procedure this
chapter.
CRANKSHAFT / CAM CHAIN /
SPROCKET INSPECTION
1. Inspect the crankshaft main bearings for wear or
damage.
NOTE: Due to extremely close tolerances and minimal
movement, the ball bearings must be inspected visually,
and by feel. Look for signs of discoloration, scoring or
galling. Turn the outer race of each bearing. The bearings
should turn smoothly and quietly. The inner race of PTO
bearing each bearing should fit tightly on the crankshaft.
The outer race should be firm with minimal side to side
movement and no detectable up and down movement.
The MAG end bearing usually stays in the case. Check
the inner race of the MAG bearing in the same manner.
2. Replace the main bearings if the components fail
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3. The connecting rod utilizes a roller bearing. Clearance
4. Check connecting rod side clearance with a feeler
5.
6.
visual inspection.
can be measured with a dial indicator to check radial
clearance. Visually inspect the connecting rod, crank
pin, and thrust washers for scoring, damage,
excessive wear, or signs of overheating. Check for
roughness or noise when rotating the connecting rod
on the crank pin. Replace crankshaft if it fails visual
inspection, or if any up and down movement is
detectable in the connecting rod.
Connecting Rod Big End
Radial Clearance:
.0004-.0014" (.011-.038 mm)
LIMIT: .0019" (.05mm)
gauge.
Refer to piston inspection in this chapter to inspect the
connecting rod small end.
Connecting Rod Side
Clearance:
.0035-.0196" (.09-.50mm)
Limit: .023" (.60mm)
Clean crankshaft oil passages by running a stream of
clean solvent through the crankshaft. Be sure all
passages are clear and free of nicks or scratches.
ENGINE
3.33