What is the initial step to inspect slack adjusters on S-cam brakes?

To effectively inspect slack adjusters on S-cam brakes, the initial step involves chocking the wheels. This is crucial as it ensures vehicle stability and safety during the inspection process. By chocking the wheels, you prevent any unintended movement of the vehicle, which is especially important when dealing with large commercial vehicles that can be heavy and difficult to control.

Once the wheels are chocked, it is safe to proceed with the inspection of the slack adjusters, which play a vital role in maintaining proper brake function and ensuring that the brakes engage and disengage effectively. If the parking brake is not engaged or the vehicle is not secured properly, it could pose serious safety risks while inspecting components like slack adjusters.