23
36
Lubrication SyStem
37
38
Pick-up Tube / Oil Aeration
• The pick-up tube supplies oil from
the oil pan to the oil pump.
• The pick-up tube is sealed to the upper oil pan
utilizing an o-ring. If the o-ring is damaged
or missing, it could cause oil aeration.
Oil Pressure Regulator
• The oil pressure regulator is located in the gerotor
housing just to the right (when looking at the
engine from the front) of the gerotor oil pump.
• The oil pressure regulator is calibrated to
open at pressures above 65 psi. It should
be closed below that pressure.
• The regulator valve utilizes a force, provided via the
regulator spring, to apply a pressure equal to 65
psi. Whenever oil pressure exceeds this force, the
regulator valve will move downward and allow the
excess pressure to bleed off back through a passage
that routes the oil back to the inlet side of the pump.
Gerotor Oil Pump
• The gerotor oil pump is driven off of the
flats on the nose of the crankshaft.
• The gerotor oil pump and regulator valve are
held in their own removeable housing.
Alignment Dowels
Inner Gear
Outer Gear
Dowel Locations
Upper Oil Pan
Pick-up Tube
Oil Pump
Oil Pressure Regulator
Regulator
Housing
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