Maintenance
155
Fig. 16
- Towball is in good condition with 50mm
dia, but the coupling head is showing an
excessive level of wear.
Caution
Under these circumstances, the coupling
head can become detached from the towball
and the caravan/ trailer can breakaway from
the tow vehicle. The coupling head and
towball must therefore be checked
IMMEDIATELY before future use. Any faulty
parts must be changed IMMEDIATELY.
All maintenance work should be carried out
by AL-KO Approved Workshops.
Operation
For coupling types AK7, AK 10/2 or
AK252. (This type of coupling is normally
fitted to trailers or older model caravans).
Coupling Up
Push the safety lever (Fig. 16/Item 1) up with
the index finger and lift the handle up and
forwards. Put the opened coupling onto the
towball with the handle pulled up and in
addition press down by hand. The coupling
will close by applying a light pressure. Press
the handle down by hand until the catch
snaps out (Fig. 16).
The coupling head is correctly engaged
when the green cylinder part of the safety
indicator is visible (Fig. 16/Item 2).
Caution
It is most important to check that the
coupling head is properly engaged on the
towball each time.
Uncoupling
Lift coupling handle fully and remove the
coupling head from the towball. Where there
are higher nose loads, coupling and
uncoupling can be made easier by using the
jockey wheel.
Wear Indicator:
If the handle reaches the back of the
cutaway portion of the housing, when the
coupling head is engaged (Fig. 17) there will
be play between the towball and coupling
head. Automatic re-adjustment is no longer
possible and the assembly will need
inspecting.
Caution:
Under these circumstances, the coupling
head can become detached from the towball
and the caravan/ trailer can breakaway from
the tow vehicle. The coupling head and
towball must therefore be checked
IMMEDIATELY before future use. Any faulty
parts must be changed IMMEDIATELY.
All maintenance work should be carried out
by AL-KO Approved Workshops.
Fig. 17