Movement is transferred to the Pitman arm, which connects to the steering linkage with a drag link. The hydraulic system helps the Pitman arm drive the linkage that turns the wheels and changes ...
The power-steering pump pressurizes the hydraulic fluid that helps the driver turn the steering wheel. Signs of steering-pump failure include leaks, noises or decreased assistance while steering.
According to sources, the Navy's preliminary investigation has revealed that the speedboat's hydraulic steering suddenly locked during the engine trial, causing it to collide with a ferry boat.