3176C and 3196 Marine Engines Caterpillar

Illustration 1	g01430354

(1) Unit injector

The adjusting instructions for the unit injector are listed below.

1. Loosen the locknut (2).

2. Turn the rocker arm adjustment screw for the unit injector clockwise. Stop turning the adjustment screw when contact is made with the unit injector.

3. Turn the adjustment screw.

   Turn ... 180 degrees (1/2 of a turn)

4. Hold the adjustment screw. Tighten the locknut (2).

   Tighten the locknut to the following torque. ... 55 ± 10 N·m (40 ± 7 lb ft)

(3) Rocker arm

(4) Rocker arm shaft

Diameter of new rocker arm shaft ... 34.000 ± 0.010 mm (1.3386 ± 0.0004 inch)

(5) Lifter group shaft

Diameter of new lifter group shaft ... 20.025 ± 0.005 mm (0.7884 ± 0.0002 inch)

The bore diameter in the body of the unit injector lifter assembly for the lifter group shaft is the following value. ... 20.050 ± 0.030 mm (0.7894 ± 0.0012 inch)

(6) Unit injector lifter assembly