Mercedes-Benz Zetros 2020 Operating Instructions Manual page 133

Coupling up
Information on trailer synchronisation
! Tractor/trailer synchronisation should be
carried out when you couple up/attach a
trailer or semitrailer to the tractor vehicle
for the first time. Not doing so could lead to
increased brake wear. Always have tractor/
trailer synchronisation carried out at a quali-
fied specialist workshop.
Semitrailers
G
WARNING
If there is too much play on the tractor/
semitrailer combination between the semi-
trailer coupling pin and the coupling plate,
the semitrailer may break away from the
coupling plate. You could lose the semi-
trailer as a result. There is a risk of an acci-
dent.
Follow the coupling manufacturer's instruc-
tions.
G
WARNING
If the semitrailer coupling is damaged or not
correctly engaged, you could lose the semi-
trailer. There is a risk of an accident.
Always check that the semitrailer coupling is
free of damage and properly engaged after
coupling-up.
Example: semitrailer coupling
Trailers/semitrailers
X
Chock the semitrailer's wheels to prevent it
from rolling away.
X
Open semitrailer coupling : with lever ;;
see the manufacturer's operating instruc-
tions.
X
Use the saddle supports to set the height of
the semitrailer so that the semitrailer plate
is 50 mm lower than semitrailer cou-
pling :.
X
Back up slowly until semitrailer coupling :
locks.
X
Stop the vehicle and apply the parking
brake.
X
After coupling: secure semitrailer cou-
pling : to prevent unauthorised operation;
see the manufacturer's operating instruc-
tions.
X
Retract the saddle supports fully; see the
manufacturer's operating instructions.
X
Connect the cable and compressed-air lines
Y
( page 134).
i Use the step or folding ladder when con-
necting cables and compressed-air lines on
the semitrailer tractor vehicle (
Tractor/trailer combination
G
WARNING
If the trailer coupling has too much longitu-
dinal play, the trailer can tear away. You
could lose the semitrailer as a result. There
is a risk of an accident.
Check the trailer coupling daily for longitudi-
nal play by moving the towbar body of the
trailer coupling forwards and back firmly.
Have any longitudinal play eliminated at a
qualified specialist workshop as soon as
possible.
The longitudinal play of the trailer coupling
cannot be checked at the coupling jaw.
G
WARNING
There is a risk of the drawbar swinging out
when coupling up the trailer. In this case,
the trailer drawbar swings uncontrollably
from side to side. If a person is in the area
of danger, there is a risk of injury.
Make sure that no persons are in the area of
danger. Set the trailer drawbar to the cor-
131
Y
page 133).
Z