Engine Description
Teledyne Continental Motors, Inc.
TM
2-12
IOF-550 Permold Series Engine Maintenance Manual
1 April 2007
pad. From the governor drive gear, lubricating oil is directed from the left main gallery
through the propeller governor to the drilled crankcase passages and oil transfer collar to
the crankshaft. Oil then travels through a transfer plug installed in the inside diameter of
the crankshaft and is routed to the variable pitch propeller. Hydraulic valve tappets
transfer oil from the main oil galleries to the cylinder overhead through the hollow
pushrods to a drilled oil passage in the rocker arms. Oil exiting the rocker arms lubricates
the valve, rocker shaft arm, stems, springs and rotocoils. The oil then falls to the lower
rocker cavity and returns to the crankcase and sump through the pushrod housings.
Oil from the left main crankcase gallery is also directed upward through crankcase oil
passages to the crankshaft main bearings and idler gear bushing. Oil is directed upward
from the idler gear bushing to both accessory drive bushings. Oil lubricating the
crankshaft mains is directed through the upper main bearing oil holes, through crankcase
passages to oil squirt nozzles that spray oil onto the underside of the pistons. Oil falls
from the pistons through the crankcase cavity back to the oil sump.
OIL TRANSFER COLLAR
CAMSHAFT
CRANKSHAFT
ACCESSORY DRIVES
IDLER
STARTER
FULL FLOW OIL FILTER
WITH BY-PASS VALVE
GOVERNOR
PAD
HYDRAULIC
LIFTERS
OIL COOLER
SUMP OIL PICK-UP
OIL PRESSURE AND
TEMPERATURE CONNECTION
OIL TEMPERATURE
CONTROL VALVE
OIL PRESSURE
RELIEF VALVE
OIL SUMP
OIL PUMP
Figure 2-8.
Lubrication Schematic