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| Illustration 1 | g00282693 |
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Fuel Injector Mechanism (1) Adjusting nut. (2) Rocker arm assembly. (3) Electronic fuel injector. (4) Pushrod. (5) Cylinder head. (6) Camshaft. (7) Lifter. | |
The fuel injector mechanism provides the downward force that is required to pressurize the fuel in the fuel injector pump. The mechanically operated electronic fuel injector (3) allows fuel to be injected into the combustion chamber. This injection occurs at the precise time. The camshaft gear is driven by an idler gear which is driven by the crankshaft gear. The camshaft has three lobes for each cylinder. Two lobes operate the inlet and exhaust valves, and one lobe operates the fuel injector mechanism. Force is transmitted from the fuel injector lobe on camshaft (6) through lifter (7) to pushrod (4). From the pushrod (4), force is transmitted through rocker assembly (2) and to the top of the fuel injector pump. The adjusting nut (1) allows setting of the injector lash. Refer to the Testing and Adjusting, "Fuel Injector Adjustment" for proper setting of the injector lash.