Replace or repair components only after the affected circuit has been secured,
locked out and tagged out (FM 55-502). Performing replacement with the circuit
energized may result in injury.
5. Using a multimeter, check for voltage at the terminals (figure 10, item 7) to ensure that electrical circuits are
deenergized. If voltage is present, ensure that the proper circuit breakers are set to OFF, locked out, and
tagged out (FM 55-502). If no voltage is present, proceed with the procedure.
6. Label and remove the wiring from the terminals (figure 10, item 7), and remove the cover (figure 10, item 4).
7. Loosen and remove the four bolts (figure 10, item 8) and lockwashers (figure 10, item 9) that secure the
actuator assembly, and remove it from the mounting bracket. Discard the lockwashers.
Figure 10. Alarm Bell Replacement