Buell 2002 P3, Service Manual

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3-48 2002 Buell P3: Engine
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OILING SYSTEM 3.12
GENERAL
1. Oil is gravity-fed from the oil reservoir to the gerotor-style
oil pump through a
feed hose. Oil enters the feed sec-
tion and fills a cavity located under the feed pump.
NOTE
See 3.13 OIL PUMP for a complete explanation of the gerotor
pump sets.
2. The feed pump transfers oil from the inlet cavity through
the
external steel line to the oil filter mount.
3. Oil flows through the filter mount cavity to the oil filter.
4. Oil enters the peripheral cavity of the oil filter, passes
through the filtering medium into the central cavity of the
oil filter, and flows into the filter adapter (fitting which
connects filter to filter mount).
5. Adequate oil pressure in the filter mount cavity activates
the
oil pressure signal light switch and shuts off the oil
pressure signal light.
6. Oil flowing from the filter adapter opens the check ball.
The check ball opens at 4-6 psi (28-41 kPa) oil pressure.
7. With the check ball open, oil flows into the crankcase
feed galley.
8. Oil flows through the feed galley in the crankcase to the
tappet blocks and hydraulic lifters.
Cross-drilled pas-
sages intersect the main feed galley and carry oil to both
hydraulic lifters.
9. Oil also enters an intersecting passage in the gearcase
cover. Oil flow is then routed to the crankshaft area.
10. Oil enters a hole in the end of the pinion gear shaft and
travels to the right flywheel where it is routed through the
flywheel to the
crankpin. Oil is forced through the crank-
pin to properly lubricate the rod bearing assembly.
11. Oil flows up passages in the push rods to the rocker
arm shafts and bushings.
12. The valve stems are lubricated by oil supplied through
drilled oil holes in the rocker arms.
13. Oil collected in the push rod areas of the cylinder heads
flows down the push rod cover, through drain holes in
the tappet blocks and into the gearcase. After providing
lubrication to the gearcase components, the oil flows to
the left side of the oil pump.
14. Feed oil to the rocker area is returned to the crankcase
through a passage in the head and cylinder.
15. Oil collected in the sump is splash-fed to the pistons,
cylinder walls and flywheel components.
16. A single piston oil jet cools the bottom of the piston with
a spray of oil.
17. Oil collected in the sump area returns to the scavenge
section of the oil pump through a passage located in the
rear section of the sump. Oil flow to the pump is accom-
plished by the scavenging effect of the pump and by the
pressure created by the downward stroke of the pistons.
18. Return oil fills a cavity above the pump's return gears.
The return gears pump oil back to the oil reservoir.