138
Driving and operating
Checking the tensioning of the
coupling ball bar
● Red marking on rotary knob must
point towards green marking on
coupling ball bar.
● The gap between the rotary knob
and the coupling ball bar must be
approx. 6 mm.
● Remove the cover from the lock
of the rotary knob and verify
whether the rotary knob is
locked. If the rotary knob cannot
be turned, it is locked.
Otherwise, the coupling ball bar must
be tensioned before being inserted:
● Unlock coupling ball bar by
turning key to position
c
.
● Pull out rotary knob and turn
clockwise as far as it will go.
Inserting the coupling ball bar
