Regarding the king pin and locking mechanism in coupling devices, what must be inspected?

In the context of inspecting coupling devices, particularly focusing on the king pin and its locking mechanism, it is crucial to ensure that all locking pins are present and securely in place. This is vital for the safe and effective connection between the tractor and the trailer. If any locking pins are missing, it compromises the integrity of the coupling, increasing the risk of accidents due to potential detachment while the vehicle is in motion.

Inspecting for all locking pins being in place is a fundamental safety measure that prevents malfunction. It is a standard practice during pre-trip inspections to check these components rigorously. The integrity of the entire coupling mechanism relies on each locking pin performing its function without fail. Therefore, this comprehensive inspection ensures the vehicle's operational safety and compliance with vehicle standards and regulations.