What does the pitman arm connect in a commercial vehicle?

The pitman arm plays a crucial role in the steering mechanism of a commercial vehicle by connecting the steering gear box to the drag link. This connection enables the transfer of motion from the steering wheel to the wheels, allowing the driver to steer the vehicle effectively. When the driver turns the steering wheel, the steering gear box converts that rotary motion into linear motion, which is transmitted through the pitman arm. The pitman arm then moves the drag link, which ultimately directs the movement of the wheels.

Understanding this function is essential for anyone involved in the inspection and maintenance of commercial vehicles, as a faulty pitman arm can lead to steering issues, compromising vehicle control and safety. Other connections, such as those related to the brake system, axle, suspension system, or control panel, do not pertain to the direct steering function that the pitman arm serves, highlighting its specific and important role in steering dynamics.