SEAL-LIP 3G9193 - Caterpillar

The Cat C9 Engine is designed for medium-duty applications. The engine has the following characteristics: air-to-air aftercooled, direct fuel injection, four-stroke cycle, in-line six-cylinder and turbocharged.Engine Specifications
Note: The front end of the engine is opposite the flywheel end of the engine. The left and the right sides of the engine are determined from the flywheel end. The number 1 cylinder is the front cylinder.
Illustration 1 g00609479
Cylinder and valve location
(A) Exhaust valve
(B) Inlet valve
Table 1
C9 Engine Specifications
Arrangement and Cylinders In-Line six-cylinder
Bore 112.0 mm (4.41 inch)
Stroke 149.0 mm (5.87 inch)
Aspiration ATAAC(1)
Displacement 8.8 L (537 in3)
Firing Order 1-5-3-6-2-4
Rotation (flywheel end) Counterclockwise
(1) Air-to-air aftercooledElectronic Engine Features
The Cat C9 Engine is designed for electronic controls. The integral on board computer controls the operation of the engine. Current operating conditions are monitored. The Engine Control Module (ECM) controls the response of the engine to these conditions and to the demands of the operator. These conditions and operator demands determine the precise control of fuel injection by the ECM. The electronic engine control system provides the following features:
Engine speed governor
Automatic air/fuel ratio control
Torque rise shaping
Injection timing control
System diagnosticsThe following programmable features are included in the electronic control:
Cruise control
Vehicle speed limiterFor more information on electronic engine features, refer to the Operation and Maintenance Manual, "Engine Features and Controls" topic (Operation Section).Additional Features
The following additional features provide increased engine fuel economy and serviceability:
Cold starting capability
Tampering detection
Diagnostics
American Trucking Association (ATA) data link ("SAE J1587") and/or "SAE J1939"Hydraulic Electronic Unit Injectors
Hydraulically Actuated Electronic Unit Injectors (HEUI) perform the following functions:
Pump the fuel.
Meter the fuel.
Time the fuel injection.The unit injectors are controlled by the ECM. The ECM uses the c