TM 55-1925-284-14&P
DIRECT SUPPORT MAINTENANCE
MARINE SANITATION DEVICE FOR
INLAND AND COASTAL LARGE TUG (LT)
WET WELL, REPLACE
INITIAL SETUP:
References:
Tools and Special Tools:
FM 55-502
Tool Kit, General Mechanic's (Item 1, Table 2,
TB 43-0218
TM 55-1925-273-10
Multimeter (Item 6, WP 0035 00)
Suitable Drain Pan
Materials/Parts:
Gloves, Chemical and Oil Protective (Item 1,
Table 3, WP 0038 00)
Goggles, Industrial (Item 2, Table 3,
Equipment Conditions:
Set to OFF the MSD DISCHARGE PUMP AND
Tag, Danger (Item 7, Table 1, WP 0039 00)
BLOWER circuit breaker in 440V power panel
Tape, Antiseizing (Item 8, Table 1, WP 0039 00)
No. 4. Lock out and tag out (FM 55-502).
All ventilation fans operating normally (TM 55-1925-
Personnel Required:
273-10).
Two Watercraft Engineers, 88L
WARNING
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.
REMOVAL
1. OPEN valve SD-3 SEWAGE DRAIN TO HOLDING TANK (figure 1, item 1).
2. CLOSE valve SD-1 SEWAGE INLET TO MSD (figure 1, item 2).
3. CLOSE valve MSD-10 WET WELL DISCHARGE (figure 1, item 3).
4. OPEN valve MSD-13 WET WELL DRAIN TO HOLDING TANK (figure 1, item 4) and drain the wet well
(figure 1, item 5) into the sewage holding tank (figure 1, item 6).
5. Perform the Wet Well Repair Disassembly procedure (WP 0030 00).
6. Place a suitable drain pan under the chlorinator discharge coupling (figure 2, item 1).
0031 00-1
