Component description Control-slider adjusting mechanism 1 2 3 4 1 Pump plunger 3 Control-slider adjusting shaft 2 Control-slider 4 Control rod The difference between this system and the P-pump is primarily in the pumping element. The element cyl- inder contains a window and a control-slider which slides on the element plunger. The control-slider con- tains the control bore for the start and end of delivery. Because the control-slider can be height-adjusted, the start and end of delivery can be changed. The pump housing contains a rotating adjusting shaft with drivers which engage in a groove on the control- slider.
When the shaft is rotated, the height of all the control-sliders is adjusted evenly, thereby changing the pilot stroke and the start of delivery. 12