Volvo VNL Operator's Manual page 322

Fifth Wheel Kingpin Lock Release Switch
Operation:
Activation of the kingpin lock release
switch ONLY unlocks the kingpin latch
mechanishm. To relock the latch mecha-
nism, you MUST pull forward and then
back up to re-engange the kingpin lock
mechanism. Failure to follow these in-
structions can result in separation of the
trailer from the tractor causing personal
injury or death.
Fifth Wheel Instructions
•
Park the vehicle and apply parking
brake for tractor trailer.
•
Put gearshift in neutral and chock
trailer wheels.
•
Lower trailer landing gear to ground.
•
Disconnect air/electric lines to tailer.
•
To release the fith wheel kingpin lock,
push the switch up. This will release
the locking mechanism. Once acti-
vated, the switch will not relock the
fifth wheel kingpin locking mecha-
nism.
•
Release parking brake and drive trac-
tor 12 inches away from the kingpin.
•
Deflate air suspension by pressing bot-
tom of suspension switch.
•
After suspesion lowers, pull clear of
trailer and reinflate suspension. See:
"Suspension Level" page 111.
•
The fifth wheel kingpin lock will only
relock if you follow the complete re-
coupling procedures. See: "Trailer
Coupling Procedures" page 323.
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