Technical data

(a) Fuel Injection Control

Fuel injection rate is controlled by changing the

relative positions of the plunger lead and barrel. The plunger

is rotated by the control pinion which is mounted on the

plunger barrel. This pinion is in mesh with the plunger lower

collar to directly turn the plunger. As the engine runs, the

injection pump camshaft rotates to move the control rack

through the centrifugal type governor weight, governor

sleeve and lever. The control rack slides to turn this pinion.

Rightward movement (STOP - mark) of the control rack

decreases the fuel injection rate and leftward movement does

the reverse.

(b) Smoke Set Unit

The smoke set unit restricts the maximum fuel injection rate from the injection pump. The

stopper is held by a spring in the illustrated position. This position is the smoke set position. When

starting the engine, pull the speed control lever fully toward the maximum speed, and the tie rod (with the

stopper spring) moves the control rack, which overcomes the spring force and moves in the direction of

the arrow, thus allowing over-injection for easy engine starting.

Fuel injection control among the cylinders is performed by the

adjusting plates having a cam mechanism. These adjusting plates are

located on the opposite side of the control rack and as these plates are

turned, the plunger barrel is also turned, thus controlling the fuel injection.

THESE ADJUSTING PLATES SHOULD NOT BE TAMPERED WITH.