TM 55-1925-282-14&P
0024 00
6. Pull the wire plug (figure 6, item 4) straight off of the high pressure cutoff switch (figure 6, item 2).
7. Unscrew the high pressure cutoff switch (figure 6, item 2), and remove it from the SYSTEM OPERATION
PRESSURE gauge (figure 4, item 9).
INSTALLATION
1. Place four wraps of antiseizing tape on the male threads of the high pressure cutoff switch (figure 6, item 2).
! CAUTION
The high pressure cutoff switch must be installed hand tight only. Do not use tools to
tighten the high pressure cutoff switch. Over tightening will lead to equipment failure.
2. Thread the high pressure cutoff switch (figure 6, item 2) into the fitting on the back of the SYSTEM OPERA-
TION PRESSURE gauge (figure 4, item 9). Tighten hand tight only, using no tools.
3. Slide the wire plug (figure 6, item 4) into place on the high pressure cutoff switch (figure 6, item 2), and secure
it in place with the screw (figure 6, item 3).
4. Perform the Follow-On Service procedure at the end of this work package.
ADJUST LOW PRESSURE CUTOFF SWITCH
1. Fully OPEN the SYSTEM HIGH PRESSURE REGULATOR (figure 4, item 8).
2. At the system controller, press the FAULT RESET switch (figure 1, item 3).
3. On the applicable system controller, press the START switch (figure 1, item 4) and observe the HIGH PRES-
SURE PUMP INLET pressure gauge (figure 4, item 10).
4. Slowly throttle the applicable inlet sea water supply valve (table 1) in the CLOSED position until the HIGH
PRESSURE PUMP INLET gauge (figure 4, item 10) indicates 15 PSI (1.0 bar).
5. If the ROWPU did not shut down before reaching 15 PSI (1.0 bar), continue to step 6. If the ROWPU did shut
down before reaching 15 PSI (1.0 bar), go to step 7.
6. Adjust the low pressure cutoff to a higher set point as follows:
a. Verify that the ROWPU is still running and that the HIGH PRESSURE PUMP INLET pressure gauge
(figure 4, item 10) indicates 15 PSI (1.0 bar).
NOTE
Access to the low pressure cutoff switch adjustment screw is gained from the top of the
flow control panel. It is not necessary to open the flow control panel to gain access to
the adjustment screw.
b. Rotate the low pressure cutoff switch adjustment screw (figure 6, item 5) a maximum of 1/8th of a turn
clockwise.
c.
Repeat steps 6a and 6b until the ROWPU shuts down when the HIGH PRESSURE PUMP INLET pres-
sure guage (figure 4, item 10) indicates between 15 PSI (1.0 bar) and 16 PSI (1.1 bar).
d. Go to step 8.
0024 00-12