TM 9-6115-730-10
200 kW TACTICAL QUIET GENERATOR SET
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THEORY OF OPERATION Continued
FUEL SYSTEM Continued
The fuel system consists of hoses, steel injector piping, fuel tank, fuel filter/water separator, transfer pump, and injectors.
The transfer pump draws fuel from the fuel tank through a fuel filter/water separator that removes water and small
impurities. The fuel is then pushed through the secondary fuel filter that removes even smaller particles from the fuel.
The fuel then enters a fuel manifold servicing unit injectors. Through the cam-actuated injectors fuel enters the diesel
engine combustion chamber, where it is mixed with air and ignited. The fuel that is not used is cooled and returned to the
fuel tank via an excess fuel return line. When the fuel level is low, the fuel level switch will either supply power to the
external auxiliary fuel pump for external fuel supply or shut down the TQG to prevent it from completely running out of
fuel. If a diesel engine runs out of fuel, it is necessary to fill the fuel filters, purge all air from the lines and pumps, and
bleed all injectors, one at a time.
AUXILIARY FUEL PUMP
The auxiliary fuel system consists of an external fuel supply, fuel filter, piping, a 24 Vdc auxiliary fuel pump and a fuel
level float switch. When the EMCP AUX FUEL switch is ON the auxiliary fuel pump is enabled to transfer fuel from the
external fuel supply to the generator fuel tank. The fuel level float switch shuts off the auxiliary fuel pump when the
generator fuel tank is full and reactivates the pump as the level drops. The fuel level indicator indicates fuel level of
generator fuel tank from empty (E) full to (F).
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