REVERSE OSMOSIS WATER PURIFICATION UNIT FOR
INLAND AND COASTAL LARGE TUG (LT)
MEMBRANE AND VESSEL SUBASSEMBLY; REPLACE, REPAIR
Tools and Special Tools:
Tool Kit, General Mechanic's (Item 1, Table 2,
Lubricant, Silicone (Item 11, Table 1,
CLOSE, lock out, and tag out (FM 55-502) valve
Tape, Antiseizing (Item 18, Table 1,
Two Watercraft Engineers, 88L
Never reuse locking hardware. Reuse of locking hardware such as lockwashers,
locking nuts, cotter pins, and lockwire can result in undetected loosening of fas-
tening hardware causing catastrophic component failure resulting in death, in-
jury, or damage to equipment. In accordance with TB 43-0218, ensure that all
locking hardware is discarded upon removal and replaced with new.
HIGH PRESSURE MEMBRANE AND VESSEL SUBASSEMBLY REPLACEMENT
1. CLOSE, lock out, and tag out (FM 55-502) the applicable Reverse Osmosis Water Purification Unit (ROWPU)
inlet sea water supply valve and ROWPU brine discharge valve as shown in table 1.
2. At 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. ROWPU Lockout/Tagout Guide
REVERSE OSMOSIS WATER MAKER No. 1
REVERSE OSMOSIS WATER MAKER No. 2
3. Label and disconnect all hoses (figure 1, item 1) from the applicable membrane and vessel subassembly
(figure 1, item 2).