The steering motor (1), located at the top left of the propulsion module (2), drives a planetary gear set in the steering differential.
A dual Hall effect speed and direction sensor (3) contains two sensing elements. As the steering motor rotates, the rotation of the internal parts of the motor induce a current (signal) into both elements of the sensor. The difference in the timing between the signals determines motor speed. Direction is determined by sensing which element provides the signal first. The sensor sends the speed signal to the Machine ECM.