An inlet pipe (19), attached to the inlet opening in the
The gear type oil pump shown in Figs. 1 and 2 is
pump body, leads to the inlet screen (2) which is
mounted on the first and second main bearing caps and
mounted with brackets to a main bearing cap.
is gear driven from the front end of the crankshaft.
The inlet screen is located below the oil in the pan and
The oil pump helical gears rotate inside a housing (Fig.
serves to strain out any foreign material which might
1). The drive gear (23) is keyed to the drive shaft which
damage the pump.
is supported inside the housing on two bushings with a
drive-driven gear keyed to the outer end of the shaft.
The oil pump inlet screen should be removed and
The driven gear (24) is supported on the driven gear
cleaned periodically in addition to the cleaning it
shaft which is pressed into the pump body.
receives each time the engine is reconditioned.
An integral plunger-type relief valve (4) by-passes
excess oil to the inlet side of the pump when the
pressure in the oil lines exceeds 105 pounds per square
Fig. 1 - Oil Pump Assembly.
Gear Cavity (Intake
Oil Passage (Gear
Oil Passage (By-Pass