Operating instructions

28
160 Coupling head
AL-KO ball-type coupling drawbars are to be used with
trailer balls Ø50 as per guideline 94/20 EC.
Safety Information
After each coupling check the correct seat of the ball-
type coupling on the ball on the towing vehicle. If correct
coupling does not take place then the trailer can remove
itself from the towing vehicle and there is danger of an
accident.
Swivel range from vertical ± 25° and horizontal ±20°
(Fig. 1). If this is exceeded the components will be
overloaded. Function is no longer ensured!
Coupling in place:
Open the ball-type coupling drawbar = to do this, pull
the coupling handle upward in the direction of the arrow
(Fig 2). The coupling mechanism has an “open position”,
i.e. as long as the coupling is not placed on the ball, the
coupling handle remains open. Place the opened ball
type coupling drawbar on the trailer ball of the towing
vehicle.
The tongue load causes the ball type coupling drawbar to
lock into place into the starting position with an audible
sound automatically.
For safety reasons also push the handle down manually
It is locked and secured automatically.
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The trailer ball is coupled correctly when the trailer
device pushes out the green cylinder of the locking
display and the green cylinder becomes visible (Fig 2)
The coupling mechanism is locked correctly when the
coupling handle can no longer be pushed down by hand.
If the ball type coupling drawbar is no longer
coupled to the trailer ball, the trailer can detach
itself from the towing vehicle.
Uncoupling:
Open the coupling handle and lift the ball type coupling
drawbar up on the trailer coupling on the towing vehicle.
Lifting up and off where there are larger tongue loads
can be made easier by using a jockey wheel.
Wear display:
A wear display on the coupling handle shows if the wear
limit of the trailer ball of the towing vehicle, or the trailer
coupling has been reached or not.
To do this couple the ball type coupling drawbar to the
towing vehicle and drive approx. 500 m with the car
& trailer. The driving movement will give the coupling
mechanism maximum reset. Finally check the wear as
follows.
If the green display is visible on the coupling handle
when coupled (see Fig 3) the ball type coupling
drawbar in its new state or the wear in the trailer ball is
within the permitted boundary/ies.
If the green display on the coupling handle is completely
covered when coupled and only the red display is visible
(Fig 3) then the causes are as follows as a rule:
• Trailer ball in the bottom most wear boundary Ø 49 or
less - ball type coupling drawbar without wear.
• Ball type coupling drawbar and trailer ball show wear.
!
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