TM 55-1925-286-13&P
0006 00
2. Press the STOP pushbutton (figure 4, item 2) and observe that the MOTOR RUN indicator light (figure 4,
item 3) goes out.
3. Turn OFF the main disconnect switch (figure 4, item 4).
4. 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) for the failed compressor.
5. CLOSE the unloader cutoff valve CA-98 or CA-99 (figure 2, item 1 or 2) for the failed compressor.
6. Lock out and tag out (FM 55-502) the valves and switches affected in steps 3-5.
OPERATION WITH FAILED SHIP'S SERVICE PRESSURE REDUCING VALVE
1. CLOSE valves CA-40 SVCE AIR TK INL (figure 5, item 1) and CA-39 SVCE AIR TK INL (figure 5, item 2).
Lock out and tag out (FM 55-502).
WARNING
Do not overpressurize the ship's service air receiver. Overpressurization can
cause catastrophic, explosive failure, with the potential for death or serious in-
jury to personnel.
2. Have one crewmember slowly OPEN valve CA-41 BYP RDC STA (figure 5, item 3) while another monitors
the ship's service air pressure gauge (figure 2, item 3).
3. When the ship's service air pressure approaches 125 PSI (8.6 bar), begin to CLOSE valve CA-41 BYP RDC
STA (figure 5, item 3). The valve must be fully closed before the ship's service air pressure reaches 125 PSI
(8.6 bar).
4. Continue to monitor the ship's service air pressure and repeat steps 2 and 3 above as required to maintain
adequate pressure for vessel operation.
1
4
3
TO PUMP
DRIVE ENGINE
2
TO BOW
THRUSTER ENGINE
Figure 5. Ship's Service Air Pressure Reducing Valve Bypass Valve
0006 00-4
