TM 5-4520-240-14
b. Fuel Pump. A 28-volt, pulsating-type electric fuel
a. Fuel Strainer. The fuel strainer (16, fig. 4-7) traps
pump (14) draws fuel from the fuel supply and pumps it
and holds dirt, moisture, and other contaminants
to the carburetor. The pump also contains a filter to
before they enter the heater fuel system. The fuel
remove any contaminants which may have passed
strainer has a metal disc-type element contained in a
through the fuel strainer.
removable sediment bowl.
Figure 4-7. Side view heater showing internal components.
the fuel valve when the thermostat calls for heat and
c. Carburetor. The carburetor meters the flow of fuel
closes the valve when the heat requirement is satisfied.
to the burner head to achieve efficient combustion. Sen-
e. Fuel Lines. Flexible fuel tubes carry the fuel from
sitive adjustment of this flow is provided by a fuel ad-
the fuel strainer to the fuel pump, and from the fuel
justment needle (8) which enables you to manually ad-
pump to the carburetor. An overflow drain tube (1, fig,
just the flow rate according to the burning charac-
4-8) from the top of the carburetor fuel float bowl (2) to
teristics of the various fuels this heater will burn,
the burner head (16) vents excess fuel to the burner
d. Solenoid Value. The solenoid valve (7) controls the
head in the event of carburetor malfunction.
flow of fuel from the carburetor fuel float bowl (6) to
the fuel nozzle. This electrically controlled device opens
4-12