CM870 5 Flow Diag. 04

5/12/2018 CM870 5 Flow Diag. 04 - slidepdf.com

http://slidepdf.com/reader/full/cm870-5-flow-diag-04 1/26

1

ISX CM870

Engine Flows and Diagrams

Cummins Northeast, Inc.



2

Lubrication System



3

1. Lubricating Oil Flow from Oil Pan through Suction Tube

2. Flow from Suction Tube to Oil Pump

3. Pressure Regulator

4. High-Pressure Relief Valve

5. Flow from Oil Pump to Oil Cooler/Filter Head Housing

6. Oil Return from Oil Cooler/Filter Head Housing to Main Oil Rifle7. Main Oil Rifle

8. Flow to Main Bearing

9. Flow from Main Bearing to Crankshaft

10. Flow to Cylinder Head

11. Flow to Piston Cooling Nozzle

12. Flow to Idler Gears

13. Oil Transfer from Main Oil Rifle

14. Flow to Air Compressor 15. Rifle Sensing Regulator Dump to Inlet.



4

1. Lubricating Oil Flow from Oil Pump 9. Flow to Main Oil Rifle

2. Thermostat 10. Oil Drain from Turbocharger

3. Oil Transfer to Rear Oil Cooler 11. Thermostat Open - Oil Flows through Oil Coolers

4. Flow through Oil Coolers 12. Thermostat Closed ± Oil Flows Directly to Oil Filter

5. Oil Cooler Flow Return to Filter Head 13. Flow to Oil Filter

6. Filter Bypass Valve 14. Bypass Valve Closed - Oil Flows to Oil Filter

7. Oil Filter 15. Bypass Valve Open - Oil Flows Directly to Main Oil Rifle

8. Flow to Turbocharger



5

1. Lubricating Oil Flow from Oil Pan through Suction Tube

2. Flow from Suction Tube to Oil Pump

3. Pressure Regulator

4. High-Pressure Relief Valve

5. Flow from Oil Pump to Oil Cooler/Filter Head Housing

6. Oil Return from Oil Cooler/Filter Head Housing to Main Oil Rifle7. Main Oil Rifle

8. Flow to Main Bearing

9. Flow from Main Bearing to Crankshaft

10. Flow to Cylinder Head

11. Flow to Piston Cooling Nozzle

12. Flow to Idler Gears

13. Oil Transfer from Main Oil Rifle

14. Flow to Air Compressor 15. Rifle Sensing Regulator Dump to Inlet.



6

1 .Lubricating Oil Flow from Cylinder Block to Cylinder Head

2. Flow around Grooved Head to Drilled Camshaft and Rocker Lever Shafts

3. Flow to Injector Rocker Lever Shafts

4. Flow to Injector Rocker Levers

5. Flow to Injector Camshaft Journal Bearings

6. Flow to Fuel Pump7. Flow to Valve Rocker Lever Shaft

8. Flow to Valve Rocker Levers

9. Flow to Valve Camshaft Journal Bearings

10. Intake Valve Rocker Lever

11. Engine Brake Lever

12. Exhaust Valve Rocker Lever

13. Injector Rocker Lever

14. Oil Drain from Overhead (Front and Rear).



7

Cooling System

Cummins Training Center



8

EGR

Turbo

EGRCooler

Water

Pump

Torque

Converter

Cooler

Thermostat

Housing

Oil

Cooler

Water

Filter

Engine

Block

Engine

Cylinder Head

Radiator

RemoteBypass



9

1. Coolant Inlet 10. Coolant Flow around EGR Valve

2. Coolant Flow from Coolant Filter 11. EGR Valve Coolant Return to Thermostat Housing

3. Coolant Bypass Flow from Thermostat 12. EGR Cooler Coolant Supply from Cylinder Block

4. Coolant Flow to Water Pump 13. Coolant Flow through EGR Cooler

5. Coolant Flow from Water Pump 14. EGR Cooler Coolant Return to Thermostat Housing

6. Coolant Flow past Oil Cooler 15. Thermostat Housing

7. Coolant Flow to Cylinder Head 16. Coolant Supply to Turbocharger

8. Lubricating Oil Cooler 17. Coolant Return from Turbocharger 9. Coolant Supply to EGR Valve Body



10

1. Coolant Flow through Cylinder Head 7. Coolant Bypass Flow to Water Pump

2. Coolant Flow from Cylinder Head to 8. Coolant Flow to Water Pump

Thermostat Housing

3. Thermostat 9. Bypass Closed

4. Bypass Open 10. Coolant Flow to Radiator

5. Coolant Flow through Thermostat Housing 11. Coolant Flow from Radiator

to Bypass Passage 12. Coolant Ports for EGR Cooler

6. Coolant Bypass Passage

12



11

Combustion Air System

Cummins Training Center



12

1. Intake Air Inlet to Turbocharger 2. Turbocharger Air to Charge Air Cooler

3. Charge Air Cooler

4. From Charge Air Cooler to Intake Manifold

5. Exhaust Gas to EGR Mixer

6. EGR Mixer

7. Air Intake Connection

8. Intake Valve Port

9. Intake Valves.



13

1. Exhaust Valve Ports

2. Exhaust Manifold

3. Turbocharger Turbine.



14

1. Exhaust In

2. Sliding Nozzle Open

3. Exhaust Gas Low Velocity Flow

4. Sliding Nozzle Closed

5. Exhaust Gas High Velocity Flow



15

1. Exhaust Gas to Manifold

2. Exhaust Manifold

3. Exhaust Gas to Turbocharger 4. Exhaust Gas to EGR Valve

5. EGR Valve

6. Exhaust Gas to EGR Cooler Connection

7. EGR Cooler

8. Cooled Exhaust Gas to EGR Connection Tube and EGR Mixer



16

Fuel System



17

1. Fuel Supply from Tank 7. Timing Actuator

2. Fuel Lift Pump 8. Fueling Supply to Injector

3. Fuel Pump 9. Timing Fuel Supply to Injector

4. Pressure Fuel Filter 10. Injector

5. Fuel Shutoff Valve 11. Fuel Drain to Tank.

6. Fueling Actuator



18

1. Fuel Supply From Tank 12. Fueling Actuator

2. Fuel Lift Pump 13. Timing Actuator 3. Compuchek Fitting (Fuel Inlet Restriction) 14. Fueling Supply to Injector

4. Fuel Pump 15. Timing Fuel supply to Injector

6. Pressure Fuel Filter 16. Fuel Drain to Tank

7. Fuel Shutoff Valve 17. Compuchek Fitting (Rail Fuel Pressure)

8. Engine Fuel Temperature Sensor 18. 380 PSI Regulator

9. 250 PSI Regulator 19. Hot Start / Stall Orifice

10. ECM Cooling Plate 20. Anti Drainback Valve

11. Rail Fuel Pressure Sensor 21. Fuel Lift Pump Bypass Valve



19

CompuCheck

Rail Pressure Sensor

250 psi Regulator Gallery Temp. Sensor

CompuCheckGear Pump

Drain

380 psi Regulator

Inlet

Suction

Gallery

Pressure

Pump Out

Pressure

CompuCheck

SOV

ISX 2002 IFSM Schematic

ECM

Cooling

Plate

*15* Micron

Pressure Filter

Lift Pump

0.008 Orifice

Metering Actuators

Timing Actuators

PulsationDampers

Fuel Lift Pump

Bypass Valve



20

VGT Turbocharger

Compressed Air



21

1. Turbocharger Speed Sensor

2. Sliding Nozzle

3. VGT Actuator

4. Turbocharger Control Valve

5. Turbocharger Control Shutoff Valve

6. Vehicle Air Supply Tank



22

Engine Diagrams



23

1. ECM Cooling Plate 11. Starter

2. Electronic Control Module (ECM) 12. Fuel Filter

3. Air Intake 13. Lubricating Oil Dipstick

4. Intake Manifold Air Temperature Sensor 14. Centinel Oil Control Valve

5. Fuel Pump 15. Turbocharger Control Shutoff Valve Filter

6. Intake Manifold Pressure Sensor 16. Engine Speed Sensor

7. EGR Differential Pressure Sensor Mounting Location 17. Air Compressor

8. Fuel Lift Pump 18. Fan Hub

9. EGR Connection Tube 19. Crankcase Breather Tube

10. EGR Temperature Sensor (not shown)



24

1. Variable Geometry Turbocharger 11. Water Pump

2. Turbocharger Actuator 12. Coolant Filter

3. Turbocharger Speed Sensor (not shown) 13. Turbocharger Oil Drain4. EGR Valve 14. Optional Dipstick Locations

5. Exhaust Gas Pressure Sensor Mounting Location 15. Lubricating Oil Drain

6. Thermostat Housing 16. Combination Full-Flow/Bypass

Lubricating Oil Filter

7. Turbocharger Control Valve 17. Flywheel Housing

8. Refrigerant Compressor 18. Lubricating Oil Cooler Assembly

9. Alternator 19. EGR Cooler

10. Turbocharger Oil Supply 20. Exhaust Manifold



25

1. Refrigerant Drive Belt

2. Air Intake Connection

3. Crankcase Breather Tube

4. Oil Fill5. Water Pump Drive Belt

6. Vibration Damper

7. Water Pump

8. Belt Tensioner, Water Pump

9. Alternator

10. Variable Geometry Turbocharger

11. Belt Tensioner, Refrigerant Compressor

12. Refrigerant Compressor



26

Questions???

CM870 5 Flow Diag. 04

Documents

coolant flow

lubricating oil flow

oil pump

oil cooler flow return

coolant bypass flow

oil filter

oil return

oil drain