TM 9-2350-247-20-1THEORY OF OPERATION — Continued 0003 00FUEL SYSTEMThe M548A1 fuel compartment is located at the rear of the carrier under the cargo compartment deck. Two electric fuelpumps supply fuel through fuel supply lines from the fuel compartment to an air separator tank. From the air separator tank,the engine fuel pump draws the fuel through the primary fuel filter. The engine fuel pump forces the fuel through thesecondary fuel filter to the engine fuel injectors. It then returns surplus fuel through the air separator tanks and fuel returnlines to the fuel compartment. Fuel for the air box heater is drawn from the secondary fuel filter. Quick disconnect fuelcouplings are used to connect the supply and return lines to the engine. The fuel compartment is filled through a fuel filler atthe left rear of the carrier and is drained through a fuel drain under the center tailgate hinge. The entire system is vented bytubes located at the right rear corner of the carrier and the fuel filler tube.The air box heater preheats air entering the engine cylinders with an electric air pump, fuel pump, and igniter. This improvesfuel ignition at low temperatures. Fuel is sprayed into the cylinder block air box and ignited to preheat incoming air.The M548A3 fuel compartment and components are similar to M548A1. Only the front of carrier and its components areshown.0003 00-4
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
