2-69.1 DIAPHRAGM VALVE AND PIPING REPLACE (H-9518-1, H-9518-2, AND H-9518-3).
This task consists of:
General Mechanics Tool Kit (Appendix B, Section III, Item 4)
Vise (Appendix B, Section III, Item 3)
Pipewrench (Appendix B, Section III, Item 3)
Tape, Anti-seize (Appendix C, Section II, Item 19)
Lubricant, O-Ring (Appendix C, Section II, Item 11)
Lockwashers and Gaskets (TM 10-4610-241-24P)
Power shut down (Power Source Manual)
ROWPU Piping drained (TM 10-4610-241-10)
It is not necessary to remove valves from unit to repair them. See Paragraph 2-70
for repair procedures. If valves are not repairable or piping sections are damaged,
the following procedures should be used.
Paragraph 2-30 provides guidance in the removal of threaded pipe sections.
Paragraph 2-29 provides guidance for grooved pipe sections.
2-272 Change 1
To facilitate installation and to prevent malfunctions, be sure to tag tubing and indicate
their connection points before removal.
To remove the control lines (1) between the valves (2) and the timer (3), tag all control lines (I) and remove
them from connectors (4) by pushing on collars and gently pulling on the tubes at the same time.
There are three piping connection points to the filter piping. Each of these grooved connections disassembles
in the same manner. Remove two nuts (5), two bolts (6) and two clamp halves (7 and 8) from each point.
Slide gasket (9) onto pipe section.
To facilitate installation and prevent malfunctions, before removing any pipe sections
from the unit, tag them and note their connection points.