TM 9-2320-366-34-1
1-12. FUEL SYSTEM
Figure 1-14. Fuel System
The primary components of the fuel system are the fuel tank (1, Figure 1-14), fuel priming pump and fuel/water
separator (2), fuel shutoff solenoid (3), fuel governor (4), and secondary fuel filter (5). The mechanical fuel pump acts
as an engine priming feature. The fuel/water separator removes water and large solid particles from the fuel before
it is passed to the fuel governor. The fuel shutoff solenoid, when energized, frees the fuel governor output shaft to
move to the FUEL ON position. When electrical power is removed from the fuel shutoff solenoid, the fuel governor
output shaft is locked in the FUEL OFF position. The fuel governor contains a mechanical link to the fuel control
linkage and fuel transfer pump. The fuel governor responds to input from the accelerator pedal and causes the fuel
control rack to rotate, resulting in an increase or decrease in engine speed. The fuel governor adjusts the amount of
fuel delivered to the engine as engine speed changes. The secondary fuel filter removes finer particles from the fuel
before it reaches the cylinder head. A fuel pressure regulator redirects excess fuel, through a fuel return hose, back
to the fuel tank.
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