To unlock the fifth wheel, where should the locking lever be positioned?

To unlock the fifth wheel, the locking lever should be positioned in the open state. The fifth wheel coupling system is designed to secure the trailer to the towing vehicle and is essential for safe operation. When the locking lever is in the open position, it allows the trailer's kingpin to disengage from the fifth wheel so that the vehicles can be separated.

In this context, having the locking lever open ensures that the mechanism is disengaged and will not hold the kingpin, allowing smooth operation when connecting or disconnecting the trailer. The position of the locking lever is critical for proper coupling and uncoupling procedures, and understanding this aspect is vital for anyone operating combination vehicles.