1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 315Get this manual
ENGINES Magnum Engine DisassemblyInspection Oil Pump Assembly
1Clean and dry all parts thoroughlyApply clean engine oil to all partsDo not use gasket sealer on the pump body mating surfaces or oil passages will become plugged2Install pump shaft and scavenge rotor drive pin3Install outer scavenge rotor, inner scavenge rotor, and scavenge casing4Install outer feed rotor and inner feed rotor drive pin5Install inner feed rotor and feed chamber cover with screw6Tighten screw securely7Install screen on pump body8Install oil pump on crankcase and torque bolts to ftIbs(.828 kgm)