When checking the coupling devices on a trailer, what should be inspected?

When inspecting coupling devices on a trailer, the key focus should be on the secure attachment, proper alignment, and ensuring there are no signs of wear. These factors are crucial for safe operation since a coupling device that is not securely attached can lead to the separation of the trailer from the towing vehicle, potentially causing an accident. Proper alignment ensures that the coupling device functions correctly without undue stress, which can lead to premature wear or failure.

Additionally, checking for signs of wear is essential; any deterioration in the coupling device can compromise its integrity and ability to hold the load securely. Regularly inspecting these elements ensures that the coupling remains reliable and safe for use, supporting overall vehicle and road safety.