freightliner 108SD, Driver Manual

Page: 141 / 192

NOTICE
Always make sure the connection hanger keeps
the trailer air hoses and electrical cables posi-
tioned so that they do not rub on anything. Rub-
bing may wear through hoses or cables, resulting
in air leaks, or exposed or broken wires, poten-
tially affecting trailer brake or electrical systems.
8.
Connect the trailer’s electrical and air lines.
Trailer Release
1. Apply the truck and trailer parking brakes.
WARNING
Do not use the trailer air supply for parking trail-
ers not equipped with spring parking brakes.
This applies the trailer service brakes only. As air
bleeds from the trailer brake system, brake appli-
cation is lost. This could allow the unattended
vehicle to roll away, possibly resulting in serious
personal injury or death.
2. Chock the front and rear tires of the trailer.
3. Disconnect the trailer air and electrical lines.
Plug the air lines to keep them free of dirt.
4. Take the weight of the trailer drawbar eye off the
pintle hook.
5. Push the latch lock towards the mounting plate
as far as possible then, while holding the latch
lock in this position, pull the top of the latch as
far as possible toward the pintle hook.
6. While holding the latch in place, release the latch
lock.
7. Slowly drive the vehicle away from the trailer.
Trailer Couplings
18.3