2005-2007 Polaris Ranger 500 service manual, Page 93Get this manual
ENGINE 3Inspect valve for wear344Check seat area for nicks or foreign material that may prevent proper sealing of valveInspect drive gear teeth for cracks, damage or excessive wearRemove three oil pump retaining bolts and pump
Crankcase Separation
1Remove flange bolts (10) from magneto side crankcase evenly in criss-cross pattern5Inspect mating surface of crankcase and oil pumpCheck for nicks, burrs, or surface irregularities
Separate crankcase by tapping with soft faced hammer in reinforced areasTap lightly on balancer gear with brass drift through the hole in the crankcase if necessary, to ensure the balancer shaft stays in the PTO side crankcaseWatch the gap along the crankcase mating surface and separate the crankcase evenlyIt may also be necessary to tap the oil pump shaft lightly to separate the crankcase