REVERSE OSMOSIS WATER PURIFICATION UNIT FOR
INLAND AND COASTAL LARGE TUG (LT)
HIGH PRESSURE PUMP, REPLACE
Tools and Special Tools:
Tool Kit, Electrician's (Item 2, Table 2,
High Pressure Pump (Item 1, Figure 5,
CLOSE, lock out, and tag out (FM 55-502) valve
Set to OFF, lock out, and tag out (FM 55-502) the
Two Watercraft Engineers, 88L
FWF PUMP circuit breaker at the Reverse Os-
mosis Water Purification Unit (ROWPU) 24 Vdc
Never reuse locking hardware. Reuse of locking hardware such as lockwashers,
locking nuts, cotter pins, and lock wire can result in undetected loosening of
fastening hardware causing catastrophic component failure resulting in death,
injury, or damage to equipment. In accordance with TB 43-0218, ensure that all
locking hardware is discarded upon removal and replaced with new.
1. CLOSE, lock out, and tag out (FM 55-502) the applicable inlet sea water supply valve as shown in table 1.
2. At the 440V power panel No. 5, set to OFF, lock out and tag out (FM 55-502) the applicable circuit breaker as
shown in table 1.
Table 1. Lockout/Tagout Guide
Inlet Sea Water Valve
REVERSE OSMOSIS WATER MAKER No. 1
REVERSE OSMOSIS WATER MAKER No. 2
3. At the applicable high pressure pump motor, remove the four screws (figure 1, item 1) that secure the
junction box cover (figure 1, item 2). Remove the junction box cover.