What is critical to check about the steering arm during a pre-trip inspection?

Ensuring that the steering arm is properly greased is essential during a pre-trip inspection as it directly impacts the ability of the steering system to function smoothly and effectively. Proper lubrication allows for fluid movement of the steering components, reducing friction and preventing wear and tear. A well-greased steering arm enhances steering responsiveness and control, contributing to safe driving conditions.

In contrast, excessive rust may indicate corrosion, which can compromise structural integrity and functionality. Similarly, if the steering arm is twisted or bent, it would indicate a significant issue that could lead to steering failure or loss of vehicle control. Lastly, stating that it requires no lubrication at all is incorrect because proper maintenance, including lubrication, is necessary for safe and effective vehicle operation.