OPERATOR AND UNIT MAINTENANCE
FUEL FILTER/WATER SEPARATOR (FUEL TRANSFER SYSTEM) FOR
INLAND AND COASTAL LARGE TUG (LT)
OPERATION UNDER USUAL CONDITIONS
Gloves, Chemical and Oil Protective (Item 1,
Goggles, Industrial (Item 2, Table 3,
One Watercraft Engineer, 88L
Engine room ventilation fans operating (TM 55-1925-
SECURITY MEASURES FOR ELECTRONIC DATA
There are no required security measures for electronic data. The fuel filter/water separator system components
do not use or store any electronic data.
The fuel filter/water separator should be primed before every use. Failure to prime the
fuel filter/water separator before use can result in fuel transfer pump failure.
Two methods are available for priming the fuel filter/water separator. The preferred method is by priming from a
high head. The secondary method is by priming using a fuel transfer pump. Both methods are described below.
PRIMING USING A HIGH HEAD
1. CLOSE valve FO-42 F.O. FLTR / WATER SEP BYPASS COV (figure 1, item 1).
2. CLOSE the drain valve (figure 1, item 2) and upper ball valve (figure 1, item 3).
3. OPEN valves FO-16 F.O. FLTR / WATER SEP INLET COV (figure 1, item 4) and FO-17 F.O. FLTR / WATER
SEP OUTLET COV (figure 1, item 5).
4. CLOSE valves FO-6 C.O.V. - F.O. XFER PMP N0.1 SUCTION (figure 1, item 6) and FO-7 C.O.V. - F.O.
XFER PMP No.2 SUCTION (figure 1, item 7).
5. Determine which fuel tank has a fuel level at least two feet higher than the top of the vent valve (figure 1,
item 8). This could be tank 3C, 4P, or 4S.
6. OPEN the suction valve for the fuel tank selected in step 5 above.
a. If tank 3C was selected, OPEN valve FO-59 F.O. TK 3C SUCT (figure 1, item 9).
b. If tank 4P was selected, OPEN valve FO-62 F.O. TK 4P SUCT (figure 1, item 10).
If tank 4S was selected, OPEN valve FO-61 F.O. TK 4S SUCT (figure 1, item 11).