Section 11 - System Diagrams

Section 11 System Diagrams Page 11-1 Section 11 - System Diagrams Section Contents Page Overview...11-3 Flow Diagram, Air Intake System...11-4 Flow Diagram, Cooling System...11-5 Flow Diagram, Exhaust System...11-10 Flow Diagram, Fuel System...11-11 Fuel System Operation...11-12 Flow Diagram, Lubricating Oil System...11-13 Assembly Diagram, Raw Water Piping...11-16

2 Section 11 System Diagrams THIS PAGE INTENTIONALLY LEFT BLANK

Section 11 System Diagrams Page 11-3 Overview The following drawings show the flow through the engine systems. Although parts can change between different applications and installations, the flow remains the same. The systems shown are as follows: Fuel system Lubricating oil system Coolant system Intake air system Exhaust system Raw Water Piping Knowledge of the engine systems can help in troubleshooting, service, and general maintenance of your engine.

4 Section 11 System Diagrams Flow Diagram, Air Intake System 1. Intake air inlet to turbocharger 4. Intake manifold - integral part of cylinder head 2. Turbocharger air to charge air cooler 5. Intake valve 3. Charge air cooler

Section 11 System Diagrams Page 11-5 Flow Diagram, Cooling System

6 Section 11 System Diagrams Flow Diagram, Cooling System (Cont) 1. Coolant inlet 4. Coolant flow past oil cooler 2. Water pump impeller 5. Upper coolant manifold 3. Coolant flow to oil cooler 6. Coolant flow to cylinder head

Section 11 System Diagrams Page 11-7 Flow Diagram, Cooling System (Cont) 1. Flow from upper coolant manifold 3. Cylinder head gasket 2. Flow to liner cavity 4. Coolant flow orifice

8 Section 11 System Diagrams Flow Diagram, Cooling System (Cont) 1. Flow past cylinder liners 2. Lower coolant manifold

Section 11 System Diagrams Page 11-9 Flow Diagram, Cooling System (Cont) 1. Thermostats 5. Partial coolant flow to radiator 2. Flow to water pump inlet 6. Restricted flow to bypass 3. Bypass passage 7. Flow to heat exchanger 4. Flow from lower coolant manifold 8. Bypass closed.

10 Section 11 System Diagrams Flow Diagram, Exhaust System 1. Exhaust valve 3. Dual entry to turbocharger 2. Exhaust manifold - pulse type 4. Turbocharger exhaust outlet.

Section 11 System Diagrams Page 11-11 Flow Diagram, Fuel System 1. Fuel from supply tank 8. Robert Bosch PES.A injection pump 2. Pre-filter or screen 9. Robert Bosch PES.P injection pump 3. Fuel transfer pump 10. Fuel drain manifold 4. Fuel/water separator 11. High-pressure fuel lines 5. Fuel filter-low-pressure supply line 12. Robert Bosch, 7-mm closed-nozzle, hole-type injectors 6. Turboboost control line 13. Fuel return to supply tank. 7. Robert Bosch PES.MW injection pump

12 Section 11 System Diagrams The function of the fuel system is to inject a metered quantity of clean atomized fuel into the engine cylinders at a precise time near the end of the compression stroke. The components of the fuel system contribute to the delivery of fuel to the cylinders. The fuel transfer pump is mechanically driven by a plunger running against a special lobe on the camshaft. The fuel transfer pump contains a pumping piston and check valves to control the flow of fuel and bleed back during engine shutdown. Fuel System Operation 1. Fuel injection pump 2. High-pressure fuel lines 3. Injectors

Section 11 System Diagrams Page 11-13 Flow Diagram, Lubricating Oil System 1. Lubrication oil filter 3. Turbocharger lubricating oil drain 2. Turbocharger lubricating oil supply 4. To main lubricating oil rifle

14 Section 11 System Diagrams Flow Diagram, Lubricating Oil System (Cont) 1. From lubricating oil cooler 4. To piston cooling nozzle 2. Main lubricating oil rifle 5. From main lubricating oil rifle 3. To camshaft 6. To connecting rod bearing

Section 11 System Diagrams Page 11-15 Flow Diagram, Lubricating Oil System (Cont) 1. From cam bushings 4. Rocker lever shaft 2. Transfer slot 5. Rocker lever bore 3. Rocker lever support 6. Rocker lever

16 Section 11 System Diagrams Assembly Diagram, Raw Water Piping Raw water is used to cool the engine coolant and is supplied from the fire pump prior to the pump discharge flange. It is forced through a cooling loop by fire pump pressure to the engine heat exchanger. Then it is discharged to an open waste cone. The following raw water manifold is available as an option (Cummins N Power Part No. 8683). If supplied by the customer, National Fire Protection Association (NFPA) Pamphlet No. 20 lists the components that are required. Refer to the Cooling System Specifications in Section 15 for process requirements. Refer to Raw Water Piping, Lineup, and Configuration in Section 3. 1. Supply Pressure Gauge 7. Normal Inlet Valve 2. Supply Pressure Gauge Isolation Valve 8. Normal Strainer 3. Bypass Outlet Valve 9. Normal Pressure Regulator 4. Bypass Pressure Regulator 10. Solenoid Operated Valve 5. Bypass Strainer 11. Normal Outlet Valve 6. Bypass Inlet Valve 12. 1 supply to the heat exchanger

Section 11 System Diagrams Page 11-17 THIS PAGE INTENTIONALLY LEFT BLANK