TM 9-2320-361-10 1-33. FUEL SYSTEM OPERATION The fuel system of the M44A2 series vehicles consists of the following major components: FUEL TANK — Stores engine fuel. FUEL TANK PUMP — Sends constant flow of fuel to fuel injection pump while ignition is on. SECONDARY AND FINAL FUEL FILTERS — Filters fuel from primary fuel filter before fuel enters fuel injection pump. DRAIN COCKS — Permit draining of excess moisture and fuel from primary, secondary, and final fuel filters. FUEL INJECTION PUMP — Pressurizes fuel in quantity controlled by accelerator pedal and hand throttle, and sends it to spray nozzle for injection into engine cylinders. PRIMARY FUEI. FILTER — Filters fuel from fuel tank before fuel enters secondary and final fuel filters 1-26