3.41
ENGINE
3
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
Crankshaft Removal / Inspection
1. Remove the shim washer (C) from the crankshaft.
2. Support the PTO side crankcase and crankshaft;
press the crankshaft out. Be careful not to damage
the crankcase mating surface or connecting rod.
3. Use a feeler gauge to measure the connecting rod big
end side clearance.
4. Place the crankshaft in a truing stand or V-blocks and
measure the runout on both ends with a dial indicator.
5. Measure the connecting rod big end radial clearance.
6. Inspect the crankshaft main bearing journals for
scoring and abnormal wear.
Connecting Rod Big End Side Clearance:
Std: .0039-.0256” (.1-.65 mm)
Limit: .0315” (.80 mm)
Max Runout: .0024” (.06 mm)
Big End Radial Clearance:
Std: .0004-.0015” (.011-.038 mm)
Limit: .0020” (.05 mm)
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