2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 96Get this manual
ENGINE Crankcase Bearing Inspection Pump Shaft Oil SealWater Pump Mechanical Seal Removal (Engine Disassembled)
NOTE: The water pump mechanical seal can be removed without removing the engineRefer to Water Pump Mechanical Seal InstallationReplace the pump shaft seal and water pump mechanical seal whenever the crankcase is disassembled
Remove the seal from the PTO side crankcaseInspect the crankshaft main bearings, balancer shaft bearings, and pump shaft bearing
NOTE: Due to extremely close tolerances and minimal wear, the bearings must be inspected visually, and by feelLook for signs of discoloration, scoring or gallingTurn the inner race of each bearingThe bearings should turn smoothly and quietlyThe outer race of each bearing should fit tightly in the crankcaseThe inner race should be firm with minimal side to side movement and no detectable up and down movement34Support the crankcase and drive or press the main bearings out of each crankcaseTo remove balancer shaft bearings and pump shaft bearing use blind hole bearing puller