Volvo VNL 780 Operator's Manual page 359

Open — This is the position the fifth wheel is in after the trailer is uncoupled. The jaw is
open and the operating rod is now dropped down and can be freely moved around. The
safety latch is rotated toward the rear of the fifth wheel. This is the position the fifth wheel
must be in when being coupled to a trailer.
W9000242
W9000203
OPERATION 349