You've finished recoupling. How should you make sure that the tractor and trailer are secure?

Explanation

"Make sure the locking mechanism is secure by selecting a low gear and attempting to move forward. Apply the parking brake again before leaving the cab. Connect the 'dog clip' to secure the kingpin release handle."

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Accepted Answer

Try to move forward with the trailer parking brake on

Question Category: Vehicle loading

You've finished recoupling. How should you make sure that the tractor and trailer are secure?