Fuel System - Cessna 150 STANDARD Service Manual

SECTION 12
FUEL SYSTEM
TABLE OF CONTENTS
FUE L SYSTEM.
Description
Precautions
Trouble Shooting
Fuel Tanks . . .
Description
Removal and Installation
Fuel Quantity Transmitters
Fuel Vents . . .
Description . . . . .
12-1. FUEL SYSTEM.
Page
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12-2. DESCRIPTION. Fuel is gravity-fed from the
metal wing tanks, through a shut-off valve and a fuel
strainer, to the carburetor. Positive ventilation is
provided by a vent line and check valve assembly lo-
cated in the left wing tank and a crossover line con-
necting the two tanks together. The vent line from
the check valve assembly extends overboard through
the lower wing skin adjacent to the left wing strut.
A fuel line drain is located between the shut-off valve
and the strainer.
12-3. PRECAUTIONS.
NOTE
There are certain general precautions and rules
concerning the fuel system which should be ob-
served when performing the operations and pro-
cedures in this section. These are as follows:
a. During all fueling, defueling, tank purging, and
tank repairing or disassembly, ground the aircraft
Checking . . . .
Fuel Shut-Off Valve.
Description . .
Removal and Installation
Fuel Strainer . . . . . . . .
Description . . . . . .
Disassembly and Assembly
Priming System . . . . . .
Description . . . . . .
Removal and Installation
to a suitable ground stake.
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b. Residual fuel draining from lines and hose con-
stitutes a fire hazard. Use caution to prevent the
accumulation of fuel when lines or hose are discon-
nected.
c. Cap open lines and cover connections to prevent
thread damage and the entrance of foreign matter.
NOTE
Throughout the aircraft fuel system, from
the tanks to the carburetor, use NS-40
(RAS-4) (Snap-On-Tools Corp., Kenosha,
WisconSin), MIL-T-5544 (Thread Compound
Antiseize, Graphite Petrolatum), USP Petro-
latum or engine oil as a thread lubricator or
to seal a leaking connection. Apply sparing-
ly to male threads only, omitting the first
two threads, exercising extreme caution
to avoid "stringing" sealer across the end
of the fitting. Always ensure that a compound,
the residue from a previously used compound,
or any other foreign material cannot enter the
system.
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