Oil Pump Assembly - Polaris Sportsman 400 Service Manual

OIL PUMP REMOVAL/INSPECTION, CONT.
10. Measure clearance between outer feed rotor and
pump body with a feeler gauge.
Outer Feed Rotor to Pump
Body Clearance:
Std: .001-.003 (.0254-.0762 mm)
Wear Limit: .004 (.1016 mm)
11. Measure rotor tip clearance with a feeler gauge.
Rotor Tip Clearance:
Std: .005 (.127 mm)
Wear Limit: .008 (.2032 mm)
12. Remove inner and outer feed rotor and pump chamber
body.
13. Repeat measurements for scavenge rotor.
14. Remove inner and outer scavenge rotor and inspect
pump shaft for wear.

OIL PUMP ASSEMBLY

1. Clean and dry all parts thoroughly. Apply clean engine oil to all parts. Do not use gasket sealer on the pump
body mating surfaces or oil passages will become plugged.
2. Install pump shaft and scavenge rotor drive pin.
3. Install outer scavenge rotor, inner scavenge rotor, and scavenge casing.
4. Install outer feed rotor and inner feed rotor drive pin.
5. Install inner feed rotor and feed chamber cover with screw.
6. Tighten screw securely.
7. Install screen on pump body.
8. Install oil pump on crankcase and torque bolts to 6 ft. lbs. (.828 kg-m).
Oil Pump Attaching Bolt Torque:
6 ft. lbs. (.828 kg-m)
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