LOCK 4D7779 - Caterpillar

The following model views show typical C-15 and C-16 Engine features. Due to individual applications, your engine may appear different from the illustrations.
Illustration 1 g00764903
Typical exampleLeft side view (1) Fuel priming pump. (2) Fuel transfer pump. (3) Fuel distribution. (4) Fuel filter. (5) Electronic Control Module (ECM).
Illustration 2 g00764904
Right side view (7) Exhaust manifold. (8) Turbocharger. (9) Temperature regulator housing. (10) Water pump. (11) Oil cooler. (12) Oil filter.
Illustration 3 g00423802
Top view (1) Fuel priming pump. (2) Fuel transfer pump. (7) Exhaust manifold. (8) Turbocharger. (13) Flywheel housing.
Illustration 4 g00764973
Front view (14) Front timing gear housing. (15) Oil gauge. (16) Vibration damper.
Illustration 5 g00764974
Typical exampleRear view (13) Flywheel housing. (17) Flywheel.General Information
The engines are electronically controlled mechanically actuated unit injector diesel engines. The C-15 is an in-line six cylinder engine with a bore of 137 mm (5.4 inch) and with a stroke of 165 mm (6.5 inch). The C-15 engine has a total displacement of 14.6 L (893 in3). The engine is configured for turbocharged air-to-air aftercooling with electronic unit injection.The engines are electronically controlled mechanically actuated unit injector diesel engines. The C-16 is an in-line six cylinder engine with a bore of 140 mm (5.5 inch) and with a stroke of 171 mm (6.7 inch). The C-16 engine has a total displacement of 15.8 L (964.18 in3). The engine is configured for turbocharged air-to-air aftercooling with electronic unit injection. Both engines have a firing order sequence:1, 5, 3, 6, 2 and 4. The rotation of these engines is counterclockwise when the engine is viewed from the flywheel end of the engine.The C-15 and the C-16 Engines incorporate several major improvements. These components included an improved electronic control system. The new features lower the smoke level for emissions under all operating conditions.The Electronic Unit Injector system eliminates many of the mechanical components that are traditionally used in the fuel injector assembly. The Electronic Unit Injector (EUI) also provides increased control of the timing and the fuel air mixture. The timing advance is achieved by precise control of the fuel injection timing. Engine rpm is controlled by adjusting the injection duration. 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 by a warning lamp or a diagnostic lamp. The check engine light is located on the dashboard. An electronic service tool can be used to read the numerical code of the faulty component or condition. Intermittent faults are logged and stored in memory.Starting the Engine
The Electronic Control Module (ECM) will automatically provide the correct amount of fuel that is necessary to start the engine. The throttle should not be held while the engine is being cranked. If the engine fails to start in 30 seconds, the starter switch should be released. The starter motor should be allowed to cool for two minutes before being used again.
Excessive ether (starting fluid) can cause piston and ring damage. Use ether for cold