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| Illustration 1 | g01063591 |
Typical view of the left side of the engine (1) Wastegate (2) Turbocharger (3) Valve mechanism cover (4) Water temperature regulator housing (5) Air inlet heater relay (6) Wastegate solenoid (7) Cylinder head (8) Inlet manifold (9) Unit injector hydraulic pump (10) Air inlet elbow (11) Engine Control Module (ECM) (12) Engine oil filler (13) Engine oil level gauge (14) Vibration damper and pulley (15) Flywheel housing (16) Fumes disposal group (17) Engine oil pan (18) Electric starting motor | |
The C9 engines use the Hydraulic Electronic Unit Injector (HEUI) for fuel injection. HEUI eliminates many of the mechanical components that are used in a pump-and-line system. HEUI provides increased control of the timing and increased control of the fuel air mixture. The timing advance is achieved by precise control of the unit injector timing. Engine rpm is controlled by adjusting the injection duration. A special pulse wheel provides information to the Engine Control Module (ECM) for detection of cylinder position and engine rpm.
The engine has built-in diagnostics in order to ensure that all of the components are operating properly. In the event of a system component failure, the operator will be alerted to the condition via the check engine light that is located on the dashboard. The Caterpillar Electronic Technician (Cat ET) can be used to read the diagnostic code of the faulty component or condition. The cruise control switches can be used to flash the corresponding flash code for the diagnostic code on the check engine light. Intermittent faults are logged and stored in memory.
Starting The Engine
The engine's ECM will automatically provide the correct amount of fuel in order to start the engine. Do not hold the throttle open while the engine is cranking. If the engine fails to start in twenty seconds, release the starting switch. Allow the electric starting motor to cool for two minutes before trying again.
Cold Weather Starting
Starting the engine and operation in cold weather is dependent on the type of fuel that is used, the oil viscosity, and other optional starting aids. For more information, refer to the Operation and Maintenance Manual, "Cold Weather Operation" topic.