OPERATOR, UNIT, AND DIRECT SUPPORT MAINTENANCE
AIR COMPRESSOR FOR
INLAND AND COASTAL LARGE TUG (LT)
OPERATION UNDER UNUSUAL CONDITIONS
Two Watercraft Engineers, 88L
SECURITY MEASURES FOR ELECTRONIC DATA
No electronic data is used or stored in the compressed air system.
The air compressors may only be operated when the ambient temperature in AMS 1 is between 32 and 104 F
(0 and 40 C). If the temperature is above this range, ventilate the space until the temperature falls into the
operating range. If the temperature is below this range, operate the space heater until the temperature rises into
OPERATION WITH ONE COMPRESSOR
If one air compressor has failed, or if the compressor needs to be taken out of service for maintenance, the LT
can operate with only one compressor. Recovery times will be much longer, but normal operation will be possible
in all other respects.
If single-compressor operation is desired, and both compressors are secured, follow
the procedure below.
1. Perform the system startup as detailed in WP 0005 00 with the following exceptions:
a. On the out-of-service compressor, CLOSE valve CA-1 or CA-2 COV COMPR DISCH (figure 1, item 1)
and valve CA-87 or CA-88 COV-COMPR DISCH (figure 1, item 2). Lock out and tag out the valves (FM
b. CLOSE the unloader cutoff valve CA-98 or CA-99 (figure 2, item 1 or 2) for the out-of-service compres-
sor. Lock out and tag out the valves (FM 55-502).
At the 440V power panel No. 4, turn OFF the circuit breaker (figure 3, item 1 or 2) for the out-of-service
compressor. Lock out and tag out the valves (FM 55-502).
2. The compressed air system may now be operated with the remaining compressor.