Volvo Trucks VHD, Руководство по обслуживанию

Страница: 25 / 52

Group 92 Design and Function
Fifth Wheel Uncoupling Procedures
For tractors with air ride suspension:
DANGER
Check that the transmission is in neutral, the wheels
to the trailer are chocked and that the parking brake is
applied. Failure to do so can result in unintended trailer
movement, serious injury or death.
DANGER
Stay clear when suspension air is released. Chassis
may drop quickly and can cause serious injury or death
to anyone under the vehicle.
Set the system park brake on the tractor.
Set the trailer brakes by pulling out the trailer air supply
knob.
Place the transmission in neutral and chock the trailer
wheels.
W9000263
Wind down the landing gear until it touches the ground
and then give it a few extra turns in low gear. Do not
raise the trailer off the fifth wheel. It may be necessary
to provide a base for the landing gear in poor ground
conditions. Fold down or remove the crank handle and
place it in the crank handle holder.
Disconnect the light cord and air brake lines. Use the
dummy air couplings to keep foreign material from
entering the brake lines.
Unlock the fifth wheel. For further information, refer to
“Unlocking the Fifth Wheel” page 13.
Note: If the operating rod is too difficult to pull, back the
tractor up slightly to relieve any kingpin load against the
fifth wheel jaw.
21