Module 3: Coupling and Uncoupling
Coupling Procedure
HOW TO TELL IF THE FIFTH WHEEL IS PROPERLY LOCKED – No Slack®
Verify secure coupling with a "tug test", by easing the tractor forward, with the trailer brakes on, to feel resistance of the load. Set the parking brakes on the tractor and trailer and get out of the tractor and visually inspect, using a flashlight if necessary, that the fifth wheel is properly closed.
The locking jaw and wedge must be fully across the throat of the fifth wheel, there must be no gap between the fifth wheel and the trailer plate, and the pull handle must be within 1" or less from the skirt of the fifth wheel. All three areas of the fifth wheel must be inspected to ensure that the fifth wheel is properly coupled.
Below are three critical areas of visual inspection that drivers must perform after every couple.
If the visual inspection indicates that you failed to obtain a proper couple, open the fifth wheel, inspect for damaged components, and repeat the coupling sequence.
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