The general consensus is that the robot never actually uttered those exact words, but they became a classic TV catch phrase anyway. A must-have how-to book for the mechanically inclined Lost In Space fan.
Here’s the robot in action, plus an interview with the late Dick Tufeld, the marvelous voice behind the “bumbling bucket of bolts” as so nicknamed by the incorrigible Dr. Zachary Smith:
Odd Yard Sale Finds 