2-69.1 DIAPHRAGM VALVE AND PIPING REPLACE (H-9518-1, H-9518-2, AND H-9518-3) - continued.
Determine which pipe section or valve is defective.
Turn the collar on unions (10) counterclockwise to separate the couplings.
Follow the procedures of Paragraph 2-30 to disassemble piping as necessary to reach the item to be replaced.
It may be necessary to remove the multimedia filter timer assembly in order disassembly
some piping. If this is necessary, follow the procedures in Paragraph 2-68.1.
Before installing any components, apply anti-seize tape to all male pipe ends. Be sure to
wrap tape in same direction as pipe thread.
Beginning with the last component removed, reassemble the pipe sections and valves
following the procedures in Paragraph 2-30.
Align the union halves (10) over each other and ensure that there is no foriegn material in
the joint. Turn the collar clockwise to secure the union.
Lubricate gaskets (9) and position over the pipe joints at the three piping connection points.
Install clamp halves (7 and 8), bolts (6) and nuts (5) on the three connection points. Use
Paragraph 2-29 for guidance.
If removed, install the multimedia filter timer (3) by following Paragraph 2-68.1.
Connect the control lines (1) from the valves (2) to multimedia filter timer assembly (3) by
following the tags.
Operate the ROWPU (TM 10-4610-241-10). Check for proper operation in the Backwash
mode and inspect for leaks.
2-272.2 Change 1