Zenith C-30HDG manual 30HDG Pump HOW IT Works, Pumping Pistons

C-30HDG PUMP — HOW IT WORKS

The pumping piston (Figure 11) is forcing the material past ball (B) and out to the nozzle, also seating ball A so that the material will not flow back to the hopper.This action also fills the compensating piston for the next stroke.

Figure 11. Pumping Pistons

Figure 12 shows the relationship between the return spring, the compensator spring and the rocker arm to maintain a smooth performance.DO NOT tighten the bolt (Item 1) completely, the rod end must be able to move.

The return spring is installed to eliminate shock and stress between the cam roller and the cam weldment when the pump is in operation. If the return spring is removed or replaced for any reason, maintain the backing plate dimension (3-inches) as shown to produce proper pre-loading of the spring for a smooth performance.

Figure 12. Return Spring, Compensator Spring and

Rocker Arm Interaction

PAGE 28 — MAYCO C-30HDG PUMP — OPERATION AND PARTS MANUAL — REV. #6 (04/02/12)