Page 6-1 Section Contents Page Overview...6-3 Flow Diagram, Fuel System...6-4 Flow Diagram, Lubricating Oil System...6-5 Flow Diagrams, Cooling System...6-9 Flow Diagrams, Air Intake System...6-11 Flow Diagrams, Exhaust System...6-13 Assembly Diagram, Raw Water Piping...6-14 Drawing No. 9775, Section 6, Rev, 02-07
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Page 6-3 Overview General Information 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 Cooling System Air Intake System Exhaust System Raw Water Piping Knowledge of the engine systems can help you in troubleshooting, service, and general maintenance of your engine.
Page 6-4 Flow Diagram, Fuel System 1. Fuel from supply tank 6. Bosch VE injection pump 2. Fuel lift pump 7. Fuel drain manifold 3. Fuel filter/water separator 8. High-pressure fuel supply lines 4. Low-pressure fuel supply lines 9. Bosch closed nozzle injectors 5. Bosch KKSB cold start injection advance 10. Fuel return to supply tanks
Page 6-5 Flow Diagram, Lubricating Oil System 1. Lubricating Oil Pump 8. Filter Bypass Valve 2. Pressure Regulating Valve Closed 9. Filter Bypass Valve Closed 3. Pressure Regulating Valve Open 10. Filter Bypass Valve Open 4. From Lubricating Oil Pump 11. To Lubricating Oil Filter 5. To Lubricating Oil Cooler 12. Lubricating Oil Filter 6. To Lubricating Oil Pan 13. From Lubricating Oil Filter 7. Lubricating Oil Cooler 14. Main Lubricating Oil Rifle
Page 6-6 Flow Diagram, Lubricating Oil System (Cont) Lubrication for the Turbocharger 1. Lubricating Oil Supply 2. Lubricating Oil Drain
Page 6-7 Flow Diagram, Lubricating Oil System (Cont) Lubrication for the Power Components 1. To Valve Train 6. Crankshaft Main Journal 2. Main Lubricating Oil Rifle 7. From Main Lubricating Oil Rifle 3. From Lubricating Oil Cooler 8. To Camshaft 4. Connecting Rod Journal 9. To Piston Cooling Nozzle 5. To Connecting Rod Bearing
Page 6-8 Flow Diagram, Lubricating Oil System (Cont) Lubrication for the Overhead 1. Main Lubricating Oil Rifle 4. Rocker Lever Shaft 2. Rocker Lever Support 5. Rocker Lever Bore 3. Transfer Slot 6. Rocker Lever
Page 6-9 Flow Diagrams, Cooling System 180
Page 6-10 Flow Diagrams, Cooling System (Cont) A 1 Coolant inlet C 1 Coolant flow from the cylinder head A 2 Pump impeller C 2 Coolant to the thermostat housing A 3 Coolant flow past oil cooler D 3 Coolant flow past injector B 4 Coolant flow past cylinder head D 4 Thermostat B 5 Coolant to cylinder head D 5 Coolant bypass passage D 6 Coolant flow to pump inlet D 7 Bypass closed D 8 Coolant flow back to radiator.
Page 6-11 Flow Diagrams, Air Intake System 1. Intake air inlet to turbocharger 4. Intake manifold 2. Turbocharger air to charge air cooler 5. Intake valve 3. Charge air cooler
Page 6-12 Flow Diagrams, Air Intake System (Cont) 1. Intake air inlet to turbocharger 3. Intake manifold 2. Air to intake manifold 4. Intake valve
Page 6-13 Flow Diagrams, Exhaust System 1. Wastegate closed 4. Exhaust manifold 2. Wastegate open 5. Turbocharger exhaust inlet 3. Exhaust valve 6. Turbocharger exhaust outlet
Page 6-14 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. 8682). If the manifold 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 10 for process requirements. Refer to Raw Water Piping, Lineup, and Configuration in Section 3. 1 4 2 3 6 9 5 12 11 10 8 7 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. 3/4 supply to the heat exchanger