Coupling and Uncoupling Standard Semi-Trailers

This course explains how to couple and uncouple a standard semi-trailer safely using a fifth wheel and kingpin.

What you will learn

• Recognise the main runaway, crush and trailer-stability risks
• Prepare the coupling area, tractor unit and trailer
• Set the correct coupling height and inspect the fifth wheel, jaws and kingpin
• Prove the lock using tug tests, a visual inspection and the security device
• Connect and disconnect air and electrical services in the correct sequence
• Raise and lower landing legs and use air suspension safely
• Complete final walk-around checks and respond to defects or unexpected movement

Training boundary: successful completion records the knowledge assessment only. It does not replace vehicle- and trailer-specific instructions, practical training, supervised assessment, site rules or written employer authorisation.