RUNNING GEAR OPERATION
32
Operating instructions • Semitrailer • 505369471-04 • 02/2019
Putting the rear braces in the driving
position
► Lift the trailer with the air suspension
until the rear braces no longer touch
the ground (see "5.9 Air suspension",
pg.43).
► Remove the spring cotter pin for the
height lock.
► Hold the foot of the rear brace and re-
move the bolt for the height lock.
► Push the foot for the rear brace up-
wards.
► Reinsert the bolt for the height lock
and secure the foot of the rear brace in
the top position.
► Secure the bolt for the height lock with
the spring cotter pin for the height lock.
► Remove the spring cotter pin for the
folding mechanism.
► Hold the rear brace by its handle and
remove the bolt for the folding mech-
anism.
► Fold up the rear brace.
► Reinsert the bolt for the folding mech-
anism.
► Secure the bolt for the folding mechan-
ism with the spring cotter pin.
► Fold up the second rear brace in the
same way.
ü The rear braces have been placed in
the driving position and secured.
5.4 Coupling and uncoupling
the trailer
DANGER
Danger to life due to crushing!
People can be crushed between the
tractor and trailer when coupling and un-
coupling.
► Instruct persons to leave the danger
area between tractor unit and trailer.
► Ensure that any guide person present
stays far enough away to the side
from the vehicles.
NOTE
Material damage due to improper coup-
ling and uncoupling
Improper coupling and uncoupling can
cause damage to the vehicle.
► Prior to coupling and uncoupling, use
the landing leg winches to adjust the
trailer to the required coupling or un-
coupling height of the tractor unit.
► When coupling or uncoupling, also
observe the instructions from the
tractor's operating instructions.
► Ensure sufficient clearance of all com-
ponents.
Fig.5-11: Coupling
1 Semitrailer plate
2 Kingpin
3 Semitrailer coupling
Coupling
► Before coupling, check:
○ Is the tractor unit's coupling load suit-
able for the trailer?
○ Do the semitrailer coupling and the
kingpin match?
○ Does the coupling height of the tractor
and trailer correspond?
○ Is the trailer correctly loaded?
○ Is the coupling plate sufficiently lubric-
ated?
► Apply the parking brake on the trailer
(see "5.8.2 Parking brake", pg.40).