Figure 1-7. Lubrication System Functional Diagram

Figure 1-6. Engine Functional Block Diagram(All Models)

TM-10-4320-226-14 Water Pumping Assembly Diesel Engine Driven Wheel Mounted 350 Gallons Per Minute (GPM) 275 Foot Head Models: 350 PAW Manual
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TM 10-4320-226-14 After the intake stroke, the compression stroke begins. The piston is moved upward by the crankshaft. The push rod controlled by the camshaft causes the intake valve to close. Air in the cylinder’s combustion chamber is compressed. When air is compressed, heat is generated. When the piston reaches the uppermost position, it is at top dead center (TDC) and the air is completely compressed. During the compression stroke, fuel is injected into the cylinder’s combustion chamber. Since the temperature is sufficient to ignite fuel, combustion takes places and the power stroke begins. Combustion causes expansion of the air and fuel which increases the pressure, Increased pressure forces the piston downward causing the crankshaft to rotate. Since the amount of fuel injected to the combustion chamber is controlled, the speed of crankshaft rotation is controlled. When the amount of fuel is increased, the speed of the engine is increased. When the power stroke moves the piston to its BDC, the exhaust valve is fully open. When the piston starts to move upward, the exhaust stroke begins. Pressure in the combustion chamber and movement of piston force exhaust gases out of the combustion chamber. At the end of exhaust stroke, the exhaust valve is closed and the intake valve is again open. The piston is at TDC and next cycle begins. Figure 1-7. Lubrication System Functional Diagram. 1.14.2.5.2 Lubrication System. The lubrication system (figure 1-7) provides lubrication and cooing to the engine’s parts. The oil sump has an 8.5 quart (8.04 liter) 1-15

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