Operating Instruction Manual
V 2019/01
17/56
6.4 Coupling / uncoupling the trailer
Functional explanation
•
A coupling head is used on car trailers fitted with a
Ø 50 mm ball head mounting.
•
Always note and observe the maximum drawbar load and
trailer load of the ball head coupling.
Impact risk during coupling process!
Body parts in the area around the coupling may be
crushed or struck during the coupling process.
►
Manoeuvre the towing vehicle carefully towards the
trailer.
►
Make sure that no one is standing in the area
around the coupling.
►
If necessary, arrange for an assistant to help
manoeuvre the vehicle using hand signals.
Operate the coupling head!
Your hands / fingers may be crushed between the
coupling head and ball head coupling on the car.
►
Always hold the coupling by the handle.
- Do not grasp the ball mounting (spherical cup) from
below.
►
Hold the drawbar / draw tube / handle when manoeu
vring the trailer.
►
Only release the hand brake once the trailer is securely
coupled.
►
Remove the wheel chocks.
WARNING
6.4.1 Coupling head
unbraked braked
1. Safety catch
2. Handle
3. Wear indicator
4. Safety display
5. Plug lock (anti-theft device)
The ball head on a car trailer coupling as well as the
coupling head on the trailer are subject to wear and tear
during operation. This depends on the driving style as
well as adhering to regular maintenance of the ball head
and the trailer coupling. The different wear indicators on
the coupling head are there for your safety. These
display the status and wear of the ball head and the
coupling cup / spherical cup.
Driving with a worn coupling head!
Trailers can become detached, skid or tip over while driving - risk
of accident!
►
Do not drive with a worn / dirty coupling head.
►
Before setting off, make sure that the coupling head
has clicked into place and the safety indicator is in the
green / positive area.
►
A ball head on the car coupling with a diameter of less
than 49 mm needs to be replaced.
H - 018
2
1
3
1
3
4
4
2
5
WARNING
Wear check
Ball coupling from below
1. Spherical cup
2. Coupling cup
Checking coupling wear
►
Regularly inspect the state of the coupling cup (2) and the
spherical cup (1).
►
Before every trip, check the condition of the ball head on
your car trailer coupling.
- The ball head must not have any visible grooves.
unbraked braked
►
Marking is outside the wear indicator range or within
area X
•
The coupling on the trailer has not been properly coupled.
►
Marking is within green / + / OK area
•
Ball head coupling is in new condition.
•
Wear of the ball head is in the permitted range.
►
Marking is within red / —/ STOP / area
•
Ball head on the car trailer coupling or trailer coupling
head is worn.
H - 016
1
2
H - 017
2
3
1
2
1
3