Neptune 7000 Series, Installation Operation & Maintenance

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6.2.7 Tilt the head and pour out any liquids retained by the check valves into a suitable container,
continue to follow safety precautions as appropriate.
6.2.8 Remove the final bolt and rinse or clean the Liquid Head with an appropriate material.
6.2.9 Inspect the diaphragm. The diaphragm must be replaced if it is cracked, separated, or
obviously damaged. Remove the diaphragm if necessary, by turning counter-clockwise.
6.2.10 To install a diaphragm, first ensure that the critical sealing areas of: diaphragm, Liquid Head,
and pump head adapter are clean and free of debris. Assemble the diaphragm with backup
plate (item #35). For MP7015-D3N, 5, 8 install spacer nut (item #50) onto the diaphragm
threads.
6.2.11 Thread the diaphragm (clockwise) completely on the push rod.
6.2.12 Install the liquid head, faceplate (for plastic heads), and bolts. Tighten bolts in an alternating
crossing pattern to ensure an even pressure on all bolts. Recommended torque is 12-13 ft-lb
for heads on MP7015-DN3, DN5, N8 pumps.