TM 5-3810-207-20/TO 36C23-3-37-12
Section V. CRANE ENGINE FUEL SYSTEM
105. General
The fuel system consists of a 50-gallon fuel
tank, fuel pump, carburetor, air cleaner, primer pump,
lines, and fittings. The crane engine fuel tank is
mounted underneath the machinery deck, on the left
side of the crane cab. The tank is filled through the
machinery deck at the left-front, outside corner of the
cab. A fuel line with a shutoff cock connects the tank to
a diaphragm-type fuel pump, mounted on the right-rear
side of the engine block. A fuel line connects to an
updraft-type carburetor, mounted on the right side of the
engine. An oil-bath type air cleaner is mounted on the
bracket at the rear of the engine with a connecting hose
from the air cleaner to the bottom of the carburetor.
During operation, clean air passes from the air cleaner
to the carburetor. At the carburetor the air picks up a
spray of gasoline. and the gasoline-air mixture is drawn
into the cylinders where it is ignited by the spark plugs.
A line from the fuel tank connects the primer pump,
which is mounted on the cab behind the operator's seat,
with a line leading directly to the engine. The primer is
for cold-weather starting.
106. Carburetor
a.
Removal. Remove the carburetor as instructed
on figure 40.
b.
Cleaning and Inspection.
(1)
Clean the carburetor with an approved
cleaning solvent.
(2)
Inspect the carburetor for wear, improper
operation, and other damage. Replace
defective carburetor.
c.
Installation. Install the carburetor as illustrated
on figure 40.
d.
Adjust. Adjust carburetor (TM 5-3810-207-10).
107. Air Cleaner and Heat Deflector
a.
Removal.
(1)
Remove the air cleaner and heat deflector
as instructed on figure 41.
(2)
Drain the oil from the air cleaner (TM 5-
3810-207-10).
b.
Cleaning, Inspection, and Repair.
(1)
Clean all parts of the air cleaner with an
approved cleaning solvent.
(2)
Inspect all parts for bends, cracks, and
other damage. Repair or replace all
defective parts.
c.
Installation.
(1)
Install the air cleaner and heat deflector
as illustrated on figure 41.
(2)
Service the air cleaner (TM 5-3810 207-
10).
108. Fuel Pump
a.
Remove the fuel pump as instructed on figure
42.
b.
Cleaning and Inspection.
(1)
Clean the fuel pump with an approved
cleaning solvent.
(2)
Inspect the fuel pump for breaks, proper
operation, and other damage. Replace
defective fuel pump.
c.
Installation. Install the fuel pump as illustrated
on figure 42.
d.
Test.
(1)
Remove the pump-to-carburetor fuel line.
(2)
Operate primer handle until fuel flows.
Note
If fuel does not flow, pump is
defective or tank-to-pump fuel line is
clogged. Replace defective pump.
109. Priming Pump, Lines, and Fittings
a.
Removal. Remove the priming pump, lines,
and fittings as instructed on figure 43.
b.
Cleaning and Inspection.
(1)
Clean the priming pump, lines, and fittings
with an approved cleaning solvent.
(2)
Inspect the priming pump, lines, and
fittings for breaks, cracks, and other
damage. Replace defective priming
pump, lines, and fittings.
c.
Installation. Install the priming pump, lines, and
fittings as illustrated on figure 43.
d.
Test.
(1)
Remove the primer fuel line at the intake
manifold.
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