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BEECHCRAFT Baron 58
Serial TH 773 and After
LUBRICATION SYSTEM
Section VII
Systems Description
The engine oil system for each engine is the full pressure,
wet sump type, with a full flow, integrally mounted oil filter
and has a 12-quart capacity. Oil operating temperatures are
controlled by an automatic thermostat bypass control. The
bypass control will limit oil flowthrough the oil cooler when
operating temperatures are below normal and will permit
the oil to bypass the cooler if it should become blocked.
The oil system may be checked through access doors in the
engine cowling. A calibrated dip stick attached to the filler
cap indicates the oil level. Due to the canted position of the
engines, the dip sticks are calibrated for either right or left
engines and are not interchangeable.
The oil grades listed in the Approved Engine Oils in the SER-
VICING section are general recommendations only, and will
vary with individual circumstances. The determining factor
for choosing the correct grade of oil is the average ambient
temperature.
COWL FLAPS
The cowl flap for each engine is controlled by
a
manual con-
trollever located on the lower center console. The cowl flap
is closed when the lever is in the up position and open when
the lever is down.
PROPELLERS
The engines are equipped with either two or three blade,
full featheri ng, constant speed, propellers. Springs aided by
counterweights move the blades to high pitch. Engine oil
under governor-boosted pressure moves the blades to low
pitch.
October 1 976
7-19
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