FUEL SYSTEM

TM 9-2320-391-10

M1078A1 SERIES THEORY OF OPERATION -

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FUEL SYSTEM

The Fuel System consists of a 56 gal (212 L) capacity fuel tank with 54 usable gal (204 L)

of fuel, fuel priming pump and fuel/water separator, fuel transfer pump, secondary fuel

filter, and fuel injectors.

1. The fuel priming pump acts as an engine priming feature and is hand actuated. The

fuel transfer pump is used to fuel the secondary fuel filter.

2. The fuel/water separator removes water and large solid particles from the fuel before

it is passed to the fuel injectors.

3. The fuel injection actuation pressure control valve receives the fuel passed from the

fuel transfer pump when it is energized by the Electronic Control Module (ECM).

4. The ECM adjusts the amount of fuel delivered to the engine as engine speed changes.

5. The secondary fuel filter removes finer particles from the fuel before it reaches the

cylinder head.

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