TM 55-1925-284-14&P
DIRECT SUPPORT MAINTENANCE
MARINE SANITATION DEVICE FOR
INLAND AND COASTAL LARGE TUG (LT)
MARINE SANITATION DEVICE, REPAIR
INITIAL SETUP:
References:
Tools and Special Tools:
FM 55-502
Tool Kit, General Mechanic's (Item 1, Table 2,
TM 55-1925-273-10
Wrench, Pipe 18 Inch (Item 7, Table 2,
Suitable Drain Pan
Materials/Parts:
Equipment Conditions:
Gloves, Chemical and Oil Protective (Item 1,
CLOSE all valves upstream and downstream of the
Table 3, WP 0038 00)
affected valve. Lock out and tag out (FM 55-
Goggles, Industrial (Item 2, Table 3,
502).
All ventilation fans operating normally (TM 55-1925-
Respirator (Item 6, Table 3, WP 0038 00)
273-10).
Tag, Danger (Item 7, Table 1, WP 0039 00)
Tape, Antiseizing (Item 8, Table 1 WP 0039 00)
Personnel Required:
Two Watercraft Engineers, 88L
NOTE
The valve replacement procedures in this work package are for typical valves found on
the Marine Sanitation Device (MSD). Actual removal and installation of the valves in this
work package may differ slightly from the procedures as written.
THREADED GATE VALVE
REMOVAL
1. Place a suitable drain pan under the union (figure 1, item 1) of the threaded gate valve (figure 1, item 2) to be
removed.
2
3
1
4
Figure 1. Threaded Gate Valve
0027 00-1
