an auxiliary steering device having a steering pedal allows a main steering system to be controlled by either the hand - operated steering wheel or the foot - operated steering pedal . the device has a lift lever for enlarging the reciprocation angular motion of the steering pedal by leverage , a lever body for turning the direction of the reciprocation angular motion into the right - angled direction and transmitting the reciprocation angular motion to a crank lever , and a connecting rod for converting the angular motion of the lever body into a rotating motion of a drive bevel gear cooperating with a steering drive shaft of the steering wheel .