TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
FUEL SYSTEM
NOTE
M1088 and M1089 Vehicles (S/N 18,550 to 199,999) are equipped with larger
fuel tanks. The larger fuel tanks have a capacity of 74.1-gal (281 L) with
72.6-gal (273 L) usable gallons.
The Fuel System consists of a 56 gal (212 L) capacity fuel tank with 54 gal 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.
0003 00-8
