A broadcast delivery system allows the delivery of broadband broadcast services over a WDM Passive Optical Network. The drive chain moves generally vertically along a first structural member, such as a vehicle frame member, as the hydraulic cylinder extends or retracts to move the expandable room relative to the vehicle frame. A crush sleeve is seated within a crush groove of the collar. A transmission mechanism for connection between an actuator and the control mechanism converts movement applied by the actuator into movement shroud or nozzle ring.