Polaris 2007 Sportsman 450 EFI, Service Manual

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3.33
ENGINE
3
Crankcase Separation
1. Remove flange bolts (10) from magneto side crankcase
evenly in a criss-cross pattern.
2. Separate crankcase by tapping with a soft faced hammer in
reinforced areas.
3. Tap lightly on balancer gear with a brass drift through the
hole in the crankcase if necessary, to ensure the balancer
shaft stays in the PTO side crankcase. Watch the gap along
the crankcase mating surface and separate the crankcase
evenly. It may also be necessary to tap the oil pump shaft
lightly to separate the crankcase.
4. Remove the Mag (RH) crankcase from the PTO case.
Oil Pump Removal/Inspection
1. Remove pump shaft bearing (A) and thrust washer (B)
from pump shaft.
2. Remove (2) bolts holding pump drive gear (C).
3. Inspect drive gear teeth for cracks, damage or excessive
wear.
4. Remove three oil pump retaining bolts and pump.
5. Inspect mating surface of crankcase and oil pump. Check
for nicks, burrs, or surface irregularities.
6. Remove the three screws and strainer screen from pump.
7. Clean screen thoroughly.
8. Remove pump body screw and feed chamber cover.
CAUTION
Do not strike the oil pump shaft at an angle or the
shaft may bend, causing irreparable damage. Tap
only lightly on the pump shaft if necessary.
C
B
A