Teledyne Continental Motors, Inc.
TM
Engine
Description
IOF-550 Permold Series Engine Maintenance Manual
2-13
1 April 2007
2-2.4.1. Oil Pump
The positive displacement oil pump consists of two meshed gears that revolve inside the
pump housing cavity.
The camshaft drives the oil pump drive gear. The oil pump drive gear drives the oil pump
driven gear. The oil pump driven gear is supported by a shaft pressed into the oil pump
housing. The oil pump drive gear shaft is supported by the tach drive housing on one end
and the oil pump housing at the opposite end. The oil pump drive gear has a tachometer
drive gear attached to its end which drives a tachometer shaft gear inside the tach drive
housing for either electrical or mechanical tachometers.
As the engine starts rotating, the oil pump drive gear turns counterclockwise (viewed
from rear of engine). The drive gear meshes with the driven gear to turn it clockwise. The
rotating gears create a suction that draws oil from the sump through the oil suction tube to
the pump gear inlet.
Oil flows from the oil pump to the oil filter housing and filter element. The oil is then
directed through the element, down through a passage in the oil pump housing and out to
the right crankcase main oil gallery. A by-pass is installed in the oil pump housing to
allow an alternate route for oil passage in the event the oil filter element becomes
clogged. The adjustable oil pressure relief valve limits oil pressure to a predetermined
value. This ensures adequate lubrication to the engine and its accessories at high engine
RPM. Oil pressure is adjusted by turning the oil pressure relief valve adjusting screw.
OIL FILTER
ELEMENT
OIL FILTER
HOUSING
OIL PUMP
HOUSING
OIL PUMP
DRIVE GEAR
OIL PUMP
DRIVEN GEAR
OIL SUCTION
TUBE PLUG
OIL FROM
OIL SUMP
OIL PRESSURE
RELIEF VALVE
RECIRCULATION
BACK TO INLET SIDE
OF PUMP GEARS
OIL FLOW
TO ENGINE
OIL FILTER
ADAPTER
BYPASS
Figure 2-9.
Oil Pump