TM 55-1925-282-14&P
OPERATOR MAINTENANCE
REVERSE OSMOSIS WATER PURIFICATION UNIT FOR
INLAND AND COASTAL LARGE TUG (LT)
PREFILTRATION SUBASSEMBLY, SERVICE
INITIAL SETUP:
Tools and Special Tools:
Personnel Required:
Tool Kit, General Mechanic's (Item 1, Table 2,
Two Watercraft Engineers, 88L
References:
Materials/Parts:
FM 55-502
Lubricant, Silicone (Item 11, Table 1,
Rag, Wiping (Item 14, Table 1, WP 0035 00)
Tag, Danger (Item 17, Table 1, WP 0035 00)
Filter Element (Item 5, Figure 4, WP 0033 00)
Filter Element (Item 10, Figure 4, WP 0033 00)
O-Ring (Item 2, Figure 4, WP 0033 00)
O-Ring (Item 9, Figure 4, WP 0033 00)
REPLACE FILTER ELEMENT
DISASSEMBLY
1. Shut down the applicable Reverse Osmosis Water Purification Unit (ROWPU) (WP 0005 00).
2. CLOSE, lock out, and tag out (FM 55-502) the applicable inlet sea water supply valve as shown in table 1.
3. Slowly, OPEN the filter air release valve (figure 1, item 1) on top of the filter housing lid (figure 1, item 2).
4. Allow any pressure to vent, or any fluid to drain.
5. Rotate the filter housing lid retaining ring (figure 1, item 3) counterclockwise, and remove it from the filter
housing (figure 1, item 4).
6. Grasp the handles (figure 1, item 5), and remove the filter housing lid (figure 1, item 2) from the filter housing
(figure 1, item 4).
7. Remove and discard the lid O-ring (figure 1, item 6).
8. Remove the filter element (figure 1, item 7) from the filter housing (figure 1, item 4) and discard.
9. Thoroughly clean the interior of the filter housing (figure 1, item 4) with fresh water and clean rags.
10. Remove all debris and foreign matter from the filter housing (figure 1, item 4).
11. Thoroughly clean the filter housing lid (figure 1, item 2) using fresh water and clean rags.
Table 1. Inlet Sea Water Supply Lockout/Tagout Guide
ROWPU
Specific Filter
Valve
1
20-Micron Filter Element
RO-V-1-1
1
5-Micron Filter Element
RO-V-1-1
2
20-Micron Filter Element
RO-V-2-1
2
5-Micron Filter Element
RO-V-2-1
0016 00-1
