Guidance summary
Inspect the fifth wheel before the controlled tug test
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Use firm level ground and apply the tractor and trailer parking brakes at the required stages. Visually verify the fifth-wheel jaws and fit the safety clip before the controlled low-gear forward tug with the trailer brake applied. Follow the full procedure for the actual coupling. During uncoupling, lower the supports and disconnect and stow lines safely before pulling clear; do not leave cables trailing.
Source: Inspect the fifth wheel before the controlled tug test
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