Abstract: A self-propelled submersible suction cleaner as used to clean the surfaces of a swimming pool transfers a vibratory movement of an oscillator located within the flow path of a suction chamber for propulsion over the submerged surface of the pool. This vibratory movement of the oscillator is also converted to a unidirectional rotational motion used in conjunction with a gear train to cause the cleaner to rotate through at least a 90 angle allowing the cleaner to improve on the random path taken by the cleaner and to maneuver away from obstacles such as pool steps potentially stopping the cleaner movement. The cleaner includes a elevation limiter that keeps the suction chamber submerged as the cleaner climbs a vertical wall and attempts to rise above the water level in the pool. A pressure relief valve eliminates the concern over debris blocking the suction and causing potential damage to the pool pump and motor.