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Disassembly and Reassembly
48
7. Remove the inner wear plate.
8. Remove and discard the square key See
“Figure 65: Square Key Removal” on
page 48.
9. Remove the oil pump shaft. Protect the oil
pump shaft with cloth and use pliers to pull it
straight out.
NOTE: It is not necessary to remove the oil
pump housing to service the oil pump. Use puller
plate P/N 204-483 or slide hammer P/N 204-638
to remove the oil pump housing if necessary.
Repair
1. Inspect the oil pump cover and housing for
damage and nicks.
2. Inspect the oil pump cover and housing for
dirt, debris, chips, and burrs. Carefully remove
any contamination. Use a clean shop wipe and
solvent (clean Stodard solvent or clean
mineral spirits) and wipe the oil pump housing
and pump cover clean.
NOTE: Pay particular attention to the lower
inner groove in the oil pump housing. Debris
often collects in this area.
3. Check the condition of the oil pump drive pin.
In most cases the drive pin will remain in the
crankshaft after the oil pump is removed. It is
not necessary to remove the drive pin from the
crankshaft for inspection.
4. Discard the old O-rings, square key, and Y
spring.
NOTE: It is strongly recommended you discard
all of the oil pump components and replace them
with Oil Pump Kit P/N 22-1160 during rebuild.
NOTE: If you choose to reinstall existing oil
pump components, make sure all components
are not worn or damaged. Accurately check the
gerotor gears, inner wear plate, and outer wear
plate to make sure they are within thickness
specifications (see “Part Dimensions” on page
23).
1.
Y Spring
2.
Notch Toward Cover
3.
Eccentric Ring
4.
Outer Wear Plate
5.
Gerotor
6.
Inner Wear Plate
Figure 64: Oil Pump Components
1.
Square Key
Figure 65: Square Key Removal
2
3
4
5
6
1
AGA557
1
AGA555
1.
Check for Debris in This
Area of the Inner Groove
Figure 66: Checking Pump Housing
1