Screw diaphragm (12, fig. 3-23) on pushrods if the diaphragm was removed, and insert pushrods (11) into
pump assembly (10).
Position pump assembly (10) against feeder assembly and secure with yoke clamp (9) and screws (8).
Attach pressure disk (6) and end plate (3) to pump assembly (10) and secure with washer (5) and capnut
Install screw (2) by turning with pin (1).
Replacement of Poppet Valves and O-Ring Gaskets.
Remove discharge and suction valves (13, fig. 3-23) from top and bottom of pump body (10) by
unscrewing yoke clamp (9). The poppet valves (14) in bottom or suction side of pump will come out with the suction
caps but the one in the top must be lifted out.
Remove the valve seat (15) from the discharge and suction ports in the pump body.
Remove 0-ring gaskets (16) from ports.
Clean, Inspect, and Replace.
Dry-cleaning solvent, P-D-680, used to clean parts is potentially dangerous to personnel and property.
Wear chemical resistant gloves when using solvents, and avoid repeated or prolonged skin contact. Do
not use near open flame or excessive heat. Flash point of solvent is 100 degrees F to 138 degrees F (38
degrees C to 59 degrees C).
Clean all parts with dry-cleaning solvent.
Inspect all parts for damage.
Replace defective parts.
Position O-ring (16, fig. 3-23), valve seat (15), and poppet valve (14) in top of discharge side of
pump body (10); the install discharge valve body (13) over O-ring (16).
Position O-ring (16) and valve seat (15) in bottom of suction ports of pump body (10), then insert
small end of poppet valve (14) into valve seat (15) and install valve body onto suction side of pump body (10) by
securing yoke clamp (9).