AIR COMPRESSOR FOR
INLAND AND COASTAL LARGE TUG (LT)
AIR COMPRESSOR, REPAIR
Tools and Special Tools:
Tool Kit, General Mechanic's (Item 1, Table 2,
Wrench, Torque, 0-250 lb-ft (Item 5, Table 2,
Set to OFF AIR COMPRESSOR NO. 1 and AIR
COMPRESSOR NO. 2 circuit breakers in 440V
power panel no. 4. Lock out and tag out
Two Watercraft Engineers, 88L
Never reuse locking hardware. Reuse of locking hardware such as lockwashers,
locking nuts, cotter pins, and lock wire can result in undetected loosening of
fastening hardware causing catastrophic component failure resulting in death,
injury, or damage to equipment. In accordance with TB 43-0218, ensure that all
locking hardware is discarded upon removal and replaced with new.
REPLACE V BELT
1. Remove the three lower screws (figure 1, item 1) and one upper screw (figure 1, item 2) that secure the belt
guard (figure 1, item 3). Remove and set aside the belt guard.
2. Remove the four bolts (figure 1, item 4), four washers (figure 1, item 5), four lockwashers (figure 1, item 6),
and four nuts (figure 1, item 7) that secure the motor (figure 1, item 8) to the foundation (figure 1, item 9).
Discard the lockwashers.
3. Slide the motor (figure 1, item 8) toward the compressor (figure 1, item 10) until the belt (figure 2, item 1) is
loose enough to slide off the motor pulley (figure 2, item 2) and compressor sheave (figure 2, item 3).
Remove the belt.
4. Label and remove the wiring from terminal L1 (figure 3, item 1) and L2 (figure 3, item 2). Remove the wiring
from the pressure switch (figure 3, item 3).
5. Remove the two bolts (figure 1, item 14) that secure the pressure switch (figure 1, item 13) to the compressor
foundation (figure 1, item 9). Remove the pressure switch.