The subject invention discloses a variety of different maintenance devices for use with a filling valve apparatus. The maintenance devices each include a movable component and a locking mechanism. An actuator of the locking mechanism is coupled to a caming section of the movable component for moving the movable component between a release position with a rim of the movable component spaced from fingers of the locking mechanism and an engaged position with the rim abutting the fingers. The fingers are wedged between the movable component and the filling valve apparatus when the movable component is in the engaged position for securing the device to the filling valve apparatus.