ROAD OPERATIONS
56
Operating instructions • Box Carrier • 505410619-02 • 05/2021
6
Road operations
6.1
Hitching and unhitching the
trailer
!
DANGER
Danger to life due to crushing!
People can be crushed between the
tractor unit and trailer when hitching and
unhitching.
► 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.
CAUTION
Risk of injury due to uncontrolled
movement of the draw fork
Upon releasing the front axle brakes, the
draw fork can suddenly swing sideways if
the wheels of the front axle are not placed
on a level, smooth ground surface.
► Park the trailer on solid and level
ground to prevent the draw fork from
moving uncontrollably.
NOTE
Material damage due to improper hitch-
ing and unhitching
Improper hitching and unhitching can
cause damage to the trailer.
► Before hitching and unhitching, set
the trailer's draw gear to the corres-
ponding height of the tractor unit's
trailer coupling.
► When hitching and unhitching, also
observe the instructions from the
tractor unit's operating instructions.
INFO
More information is available from the en-
closed supplier documentation and BG in-
formation "Safe coupling of trailers".
1
Fig. 6-1:
Coupling ring
1
Coupling ring
Hitching the central axle trailer
► Before coupling, check:
○
Is the tractor unit's permissible towing
capacity adequate for the trailer?
○
Has the permissible drawbar load
been observed?
○
Has the permitted maximum length
been observed?
○
Do the tractor unit's trailer coupling
design and the trailer's coupling eye
design match?
○
Do the position of the draw gear and
the coupling height match?
► Apply the parking brake on the trailer
(see "5.9.2 Parking brake", pg. 38)
.
► Use wheel chocks to prevent the trailer
from rolling away
► Move the tractor unit towards the
coupling ring, leave approx. 1 m dis-
tance.
► Set the height of the coupling ring to
the centre of the coupling funnel or to
the height of the lowest lip on the
coupling funnel.
► Use the coupling's hand lever to move
the coupling bolts to the “opened” posi-
tion.
► Lock the coupling funnel in open posi-
tion.