RUNNING GEAR OPERATION
Operating instructions • Semitrailer • 505369471-04 • 02/2019
47
Also observe the enclosed supplier
documentation.
5.12.1
Automatically locking the self-
steering axle via the back-up
interlock
!
WARNING
Risk of accident when reversing with
an unlocked self-steering axle!
When reversing with an unlocked self-
steering axle, the vehicle can run out of
track. It is no longer possible to reset to a
straight position, this can result in an acci-
dent.
► Always lock the self-steering axle with
the back-up interlock when reversing.
Locking the self-steering axle
► Properly connect the supply and con-
trol connections between the tractor
unit and the trailer vehicle
ply and control connections", pg. 35)
.
► Straighten the combination.
► Engage reverse gear on the tractor.
ü
The self-steering axle is locked.
INFO
When the vehicle is unhitched, the back-
up interlock can be controlled via the
manual control unit. If the manual control
unit is used, the back-up interlock must al-
ways be unlocked manually.
5.12.2
Manually locking the self-steer-
ing axle
!
WARNING
Risk of accident when reversing with
an unlocked self-steering axle!
When reversing with an unlocked self-
steering axle, the vehicle can run out of
track. It is no longer possible to reset to a
straight position, this can result in an acci-
dent.
► Always lock the self-steering axle with
the back-up interlock when reversing.
INFO
When manoeuvring without supply and
control connections between the tractor
unit and trailer, the self-steering axle must
always be manually locked and unlocked.
This does not take place automatically.
The control switch for the back-up interlock
can be found on the control unit.
505821725-01
7
5
6
11
10
8
4
2
1
9
3
< 5"
7
5
6
11
10
8
4
2
1
9
3
+
> 5"
500626977-01
P
P
515040284-01
Senken / Stopp / Heben
Lower / Stop / Raise
Abgesenkt
Lowered
Fahrt
Drive
500626979-01
1
Fig. 5-29:
Back-up interlock
1
Back-up interlock control switch
INFO
The operation is also indicated by picto-
grams. The shape and colour of the con-
trol units may vary depending on the type
of device and differ from the type shown in
the figure.
Locking the self-steering axle
► Straighten the combination.