TM 55-1925-286-13&P
OPERATOR MAINTENANCE
AIR COMPRESSOR FOR
INLAND AND COASTAL LARGE TUG (LT)
COMPRESSED AIR REGULATOR, ADJUST
INITIAL SETUP:
Tools and Special Tools:
References:
Tool Kit, General Mechanic's (Item 1, Table 2,
Personnel Required:
Equipment Conditions:
Two Watercraft Engineers, 88L
Air compressors operating under usual conditions
INCREASE AND DECREASE SYSTEM PRESSURE
1. Position one crewmember at the system pressure gauge to observe the reading. The second crewmember
will perform steps 2 through 4 below.
2. Place one wrench on the adjusting screw (figure 1, item 1) to hold it stationary.
3. Use a second wrench to loosen the jam nut (figure 1, item 2).
4. To increase system pressure, turn the adjusting screw (figure 1, item 1) slowly clockwise. Stop turning the
adjusting screw when the desired system pressure is attained.
5. To decrease system pressure, have one crewmember OPEN and CLOSE an air drain or operate an air
component downstream of the pressure regulator (figure 1, item 3), and the second crewmember turn the
adjusting screw (figure 1, item1) counterclockwise until the desired air pressure is attained.
6. Use one wrench to hold the adjusting screw (figure 1, item 1) stationary while tightening the jam nut (figure 1,
item 2).
7. After tightening the jam nut (figure 1, item 2), confirm that the system pressure has remained at the desired
setting. If not, repeat steps 2 through 6 above.
1
2
3
Figure 1. Compressed Air Regulator
END OF WORK PACKAGE
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