It is used to turn the plunger to c

It is used to turn the plunger to change the fuel supply of the injection pump. The regulating lever moves with the regulating ring, turning the plunger at an Angle that changes the oil supply. The connecting teeth indicated by the protruding tip on the pad ring of the regulating gear ring assembly are meshed with the missing teeth of the gear rod during assembly. On the outside circular surface of the regulating gear rod, there is a line indicating the oil supply, and the pointer mounted on the side of the pump body indicates the position of the rack. Outside the circular surface also milling out a positioning groove, the pump body of the positioning screw deep into the groove, to prevent the adjustment of the gear rod rotation.