This equipment operates at High Voltages. This procedure can be
performed only by qualified civilian or military personnel in MOS 51R,
52C, 52D, or 52G. Prior to any repair to, or replacement of the pressure
switch, ensure Circuit breaker #10 on panel board #1 is set to OFF.
Touching a live wire can cause serious injury or death.
If the freshwater pump cover was removed, reinstall the cover as
described in work package 0034.
Replace the pressure switch by removing its cover (1). With the circuit breaker #10 on panel board #1 set
to OFF, remove and tag the electrical wires (2) from the pressure switch.
Remove the power cord (3) from the switch housing by removing the locknut (4) and pulling the threaded
portion from the housing.
Unscrew the hex union (5) holding the switch to the freshwater line stem (6).
Apply antiseize tape to the threads of the pipe stem (7) and install the new switch onto the freshwater line
stem (6) by tightening the hex nut (5).
Reconnect the power cord (3) to the switch housing by tightening the locknut (4).
Reconnect the electrical wires (2) to the switch panel. (Refer to work package 0074 Figure 6 for pressure
switch wiring instructions, if necessary) Replace the switch cover.
Reconnect the freshwater supply hose to the freshwater input panel and close gate valves on the
freshwater line. Disconnect the garden hose from the fitting at the end of the freshwater line.
Set circuit breaker #10 on panel board #1 to ON. Start pump as described in WP 0005.