PISTON 3255978 - Caterpillar

Illustration 1 g01192268
Injector Mechanism
(1) Rocker arm
(2) Adjustment screw
(3) LocknutFollow the procedure in order to adjust the mechanical electronic unit injectors:
Put the No. 1 piston at the top center position on the compression stroke. Refer to Systems Operation/Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".
Cylinders 3, 5, and 6 can be adjusted with cylinder 1 at Top Center compression stroke.
Loosen the locknut (3).
Turn the adjustment screw (2) until the screw contacts the mechanical electronic unit injector.
Tighten the adjustment screw to an additional two turns.
Turn the adjustment screw counterclockwise for 2.5 turns.
Turn the adjustment screw until the screw contacts the mechanical electronic unit injector.
Turn the adjustment screw clockwise an additional 180 degrees.
With the adjustment screw in this position, tighten the locknut to a torque of 100 10 N m (74 7 lb ft).
Rotate the engine in the normal operating direction by 360 degrees. Cylinder 1 will now be on Top Center exhaust stroke.
Cylinder 1, 2, and 4 can be adjusted with cylinder 1 at Top Center exhaust stroke.
Loosen the locknut.
Turn the adjustment screw until the screw contacts the mechanical electronic unit injector.
Turn the adjustment screw to an additional two turns.
Turn the adjustment screw counterclockwise for 2.5 turns.
Turn the adjustment screw until the screw contacts the mechanical electronic unit injector.
Turn the adjustment screw clockwise an additional 180 degrees.
With the adjustment screw in this position, tighten the locknut to a torque of 100 10 N m (74 7 lb ft).