RELIEF VALVE ADJUSTMENT

TM 55-1925-292-14&P

0029 00

7. Install the coupling cover (figure 2, item 4) with two bolts (figure 2, item 1), two flat washers (figure 2, item 3),

and two new lockwashers (figure 2, item 2).

8. Position the inlet piping (figure 1, item 10) and new gaskets (figure 1, item 12) into place.

9. Loosely secure with the four bolts (figure 1, item 7) , four nuts (figure 1, item 8), eight bolts (figure 1, item 4), and

eight nuts (figure 1, item 5).

10. Verify that the flanges are aligned, and tighten the eight bolts (figure 1, item 4) and four bolts (figure 1, item 7).

11. Position the discharge flange (figure 1, item 3) to the pump (figure 1, item 11) using a new gasket (figure 1, item 12),

and loosely secure with the eight bolts (figure 1, item 1) and eight nuts (figure 1, item 2).

12. Tighten the eight bolts (figure 1, item 1).

13. Remove the lockouts and tagouts (FM 55-502).

14. Operate the AFFF pump (WP 0005 00) and observe that the pump operates normally without unusual noise,

vibration, or leakage.

15. Perform the Relief Valve Adjustment procedure in this work package.

RELIEF VALVE ADJUSTMENT

NOTE

The relief valve must be adjusted under operating conditions. Ensure that steps 1-3 are

performed prior to adjusting the relief valve.

1. Set the AFFF PUMP circuit breaker on the main switchboard to ON.

2. Position a crewmember with sound powered telephone at the fire monitor on top of the pilothouse.

3. Position a crewmember with sound powered telephone at the AFFF pump.

4. Remove the seal cap (figure 5, item 1) and gasket (figure 5, item 2). Discard the gasket.

5. Loosen the lock nut (figure 5, item 3) on the adjusting screw (figure 5, item 4).

6. Back the adjusting screw (figure 5, item 4) to the point where the end of the screw will be at the maximum

extension of approximately 1.06 inches (26.9 millimeters) when measured from the relief valve bonnet (figure 5,

item 5).

7. Bring the diesel engine-driven fire pump online (WP 0005 00) and check that the diesel engine-driven firefighting

pump discharges raw water properly at the fire monitors (WP 0005 00).

8. Set the ON/OFF switch (figure 6, item 1) on the AFFF pump motor controller to ON (figure 6, item 2).

9. Verify that the POWER AVAILABLE indicator (figure 6, item 3) is illuminated.

10. Press the START button (figure 6, item 4).

11. Verify that the MOTOR RUN indicator (figure 6, item 5) is illuminated.

0029 00-5