CYLINDER GP-STICK 3683259 - Caterpillar

Illustration 1 g01203687
Fuel injector operation
(1) Screw
(2) Rocker arm
(3) Clamp
(4) Control rod
(5) Rack
(6) Plunger
(7) Lifter assembly
(8) Camshaft The fuel injector is held in position by clamp (3). Fuel is injected when rocker arm (2) pushes the top of the fuel injector downward. The movement of the rocker arm is controlled by camshaft (8) through lifter assembly (7) and control rod (4). The amount of fuel that is injected is controlled by rack (5). Movement of the rack causes the rotation of a gear that is fastened to plunger (6). Rotation of the plunger changes the effective stroke of the plunger.Injection timing is a product of two factors. The two factors include the angular location of the camshaft and the location of the plunger. The angular location of the camshaft is controlled by the camshaft drive gears at the rear of the engine. The location of the plunger can be adjusted with screw (1).