DIRECT SUPPORT MAINTENANCE
AIR COMPRESSOR FOR
INLAND AND COASTAL LARGE TUG (LT)
COMPRESSED AIR SYSTEM, REPLACE
Tools and Special Tools:
Tool Kit, General Mechanic's (Item 1, Table 2,
Goggles, Industrial (Item 3, Table 3,
power panel no. 4, lock out, and tag out
Two Watercraft Engineers, 88L
OPEN the starting air and ship's service air receiver
drain valves CA-46, CA-47, AND CA-48. Lock
out and tag out (FM 55-502).
REPLACE THREADED VALVES AND PIPING
Never attempt to connect union connections with only one wrench. Damage to the
vessel's standing piping could occur. Always use two wrenches.
1. Analyze the valve or piping that must be replaced to determine the best way to remove the affected compo-
nent. The goal is to permit sufficient room to unthread the affected component. Sometimes it may be
necessary to remove an entire section of piping in order to replace a single component. Sections of piping
can most easily be removed at flange (figure 1, item 1) or union (figure 1, item 2) joints.
Figure 1. Replace Threaded Piping