Volvo VNL 780 Operator's Manual page 372

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362
OPERATION
W9000180
Check the kingpin to fifth wheel clearance by moving the tractor backward and forward
with the trailer brakes set. If the clearance appears excessive (more than 3 mm [1/8 in.]),
or if the jaw does not lock, the fifth wheel should be inspected by a qualified technician
before proceeding.
Wind up the trailer landing gear (trailer support) to its fully retracted position. Fold down or
remove the crank handle and place it in the crank handle holder.
Check the air brake lines and the trailer light cord connections.
Remove the wheel chocks from the trailer wheels.

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