TM 5-3810-306-20
Injection Pump
Low pressure fuel from the fuel filter and head is sent to the injection pump at 140 kPa the injection pump builds the high
injection pressures required for combustion and routes the fuel through high pressure fuel lines to each injector. The
injector pump is equipped with an emergency fuel shutoff solenoid.
Fuel Injectors
The engine uses a 17 mm closed-nozzle, hole-type injector. When the high-pressure fuel reaches the injector, the
pressure 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 the
injection pump vent fitting. Fuel from the fitting is returned to the supply tank.
Quick Starting Kit
The quick starting system consists of an atomizer, valve assembly, starting aid bottle and temperature control. The quick
start system is normally used during cold weather operations to facilitate engine starting. When the quick start system is
used, starting aid from the bottle is passed through the atomizer into the air intake manifold where it mixes with the intake
air to facilitate engine combustion. Temperature control prevents a hot engine being primed with the starting aid.
Air Cleaner
The engine air intake system consists of two air cleaners: one on each side of the engine hood assembly. The intake pipe
also 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 into
the compressor side of the turbocharger. Intake air from the turbocharger flows through the cooling fins of the aftercooler
before entering the intake manifold. The cooled air becomes more dense and contains more oxygen which allows more
fuel to be injected increasing power output from the engine.
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