Fuel System - TM-55-1905-223-24-40016

TM 55-1905-223-24-4

(4) Oil is then returned from the turbocharger to the pan.

d. Fuel System. Diesel fuel is drawn in by a gear type fuel lift pump. It is then forced through a fuel water

separator/filter to the injector pump which acts as a distributor. At this point excess fuel is returned to the supply. The

injector pump supplies fuel to the injectors which spray fuel into the cylinder. The fuel is ignited by the heat of

compressed air.

e. Air System. The diesel engine requires several hundred cubic feet of air for every gallon of fuel that burns. For

the engine to operate efficiently, it must breathe freely. Air intake and exhaust systems must not be restricted.

(1) Intake air is routed through an air cleaner to the intake air inlet of turbocharger, through air crossover tube. The

air then enters the intake manifold to the intake valve. this valve supplies the cylinder with air to be compressed. After

fuel ignition the air escapes from the cylinder to the exhaust valve, through the exhaust manifold, enters the turbocharger

and exits the turbocharger exhaust outlet.

(2) Turbocharger. The turbocharger forces more air intake into the combustion chambers. This added volume of

air causes the engine to burn more fuel, thereby increasing horsepower. Without a turbocharger the engine would be

naturally aspirated, supplying less air and producing less power.

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