Adjusting Mechanism

Fig. 10 Adjusting Mechanism:

The control rod actuated by the governor moves the pump plunger via the control sleeve, Fig. 10. This changes the position of the helix in the plunger in relation to the spill port in the pump barrel. Depending on the size and type of the pump, this is done in two different ways: by means of a pinion or a lever. With the pinion version, the control sleeve which is slipped over the barrel has at its upper end a clamped on toothed segment (ring gear), and at the bottom it has two longitudinal slots in which the plunger control arms (drivers) glide. The teeth of the toothed segment are engaged by the toothed control rod. With the lever version the control rod has a transverse guide slot for each plunger and barrel assembly. This slot is engaged by a lever which is connected to the control sleeve and which has a ball head or pin.