TM 5-3810-306-20Injection PumpLow pressure fuel from the fuel filter and head is sent to the injection pump at 140 kPa the injection pump builds the highinjection pressures required for combustion and routes the fuel through high pressure fuel lines to each injector. Theinjector pump is equipped with an emergency fuel shutoff solenoid.Fuel InjectorsThe engine uses a 17 mm closed-nozzle, hole-type injector. When the high-pressure fuel reaches the injector, thepressure lifts the needle valve against the spring tension to allow fuel to enter the combustion chamber.Any leakage past the needle valve enters the fuel drain manifold. The manifold routes leakage from the injectors to theinjection pump vent fitting. Fuel from the fitting is returned to the supply tank.Quick Starting KitThe quick starting system consists of an atomizer, valve assembly, starting aid bottle and temperature control. The quickstart system is normally used during cold weather operations to facilitate engine starting. When the quick start system isused, starting aid from the bottle is passed through the atomizer into the air intake manifold where it mixes with the intakeair to facilitate engine combustion. Temperature control prevents a hot engine being primed with the starting aid.Air CleanerThe engine air intake system consists of two air cleaners: one on each side of the engine hood assembly. The intake pipealso includes a restriction indicator to indicate a dirty air cleaner.The air cleaners are the dry-type with replaceable primary and safety elements. Air is drawn through the air cleaner intothe compressor side of the turbocharger. Intake air from the turbocharger flows through the cooling fins of the aftercoolerbefore entering the intake manifold. The cooled air becomes more dense and contains more oxygen which allows morefuel to be injected increasing power output from the engine.1-15
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