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SECTION
7
CESSNA
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AIRPLANE AND SYSTEMS DESCRIPTION MODEL 2088 (675 SHP)
ENGINE LUBRICATION SYSTEM
(Continued)
After cooling and lubricating the engine moving parts, oil is scavenged
as follows:
1.
Oil from the number
1
bearing compartment is returned by gravity
into the accessory gearbox.
2. Oil from the number 2 bearing is scavenged by the front element
of the internal scavenge pump back into the accessory gearbox.
3.
Oil from the number
3
and number
4
bearings is scavenged by
the front element of the external scavenge pump into the
accessory gearbox.
4.
Oil from the propeller governor, front thrust bearing, reduction
gear accessory drives, and torquemeter is scavenged by the rear
element of the external scavenge pump where it is routed through
a thermostatically-controlled oil cooler and then returned to the oil
tank.
5.
The rear element of the internal scavenge pump scavenges oil
from the accessory case and routes it through the oil cooler
where it then returns to the oil tank.
Breather air from the engine bearing compartments and from the
accessory and reduction gearboxes is vented overboard through a
centrifugal breather installed in the accessory gearbox. The bearing
compartments are connected to the accessory gearbox by cored
passages and existing scavenge oil return lines. A bypass valve,
immediately upstream of the front element of the internal scavenge
pump, vents the accessory gearbox when the engine is operating at
high power.
An oil
diosticklfiller cao is located at the rear of the enaine on the left
slde and'ls accesslble'when the left s de of tne upper c&llng
IS
ralsed
Marklnas whlcn ndlcate U S auarts low if the
011
IS
hot are orovlded on
the
dipstick to facilitate oil se~icin~. The oil tank capacity'is
9.5
U.S.
quarts and total system capacity is
14
U.S. quarts. For engine oil type
and brand, refer to Section 8.
Revision
23
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