TM 55-1925-286-13&P
UNIT MAINTENANCE
AIR COMPRESSOR FOR
INLAND AND COASTAL LARGE TUG (LT)
AIR COMPRESSOR, REPAIR
INITIAL SETUP:
Tools and Special Tools:
References:
Tool Kit, General Mechanic's (Item 1, Table 2,
FM 55-502
TB 43-0218
Multimeter (Item 4, Table 2, WP 0029 00)
Wrench, Torque, 0-250 lb-ft (Item 5, Table 2,
Suitable Straightedge
Equipment Conditions:
Materials/Parts:
Set to OFF AIR COMPRESSOR NO. 1 and AIR
Tag, Danger (Item 6, Table 1, WP 0033 00)
COMPRESSOR NO. 2 circuit breakers in 440V
power panel no. 4. Lock out and tag out
Personnel Required:
(FM 55-502).
Two Watercraft Engineers, 88L
WARNING
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
REMOVAL
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.
0019 00-1
