Driving
5.7 Towing a trailer
Operating manual GMK 6400 3 112 993 en 5 - 85
12.07.2013
Removing supply
lines
• Proceed as follows:
– First disconnect the hose of the supply
line from the red coupling head (1). Now
the trailer is braked.
– Then disconnect the hose of the brake line
from the yellow coupling head (4).
• Remove the plug (5) of the trailer electrical
system from the socket.
• If necessary, remove the plugs (2) and (3)
from the sockets (ABS and special fittings).
Uncoupling the
trailer
• Secure the trailer with the service brake and
chocks as prescribed to prevent it from roll-
ing away.
• Open the towbar coupling.
Push the lever (1) up until it latches into
place.
• Drive the truck crane carefully away from
the trailer.
s
G
Risk of accident due to trailer moving unintentionally
Always first remove the hose from the supply line so that the trailer is
braked. This prevents the trailer from moving when you remove the brake
hose.
G
Risk of injury when the automatic closing device is triggered
Never put your hand into the coupling jaw when the towbar coupling is
open.
This prevents the coupling from closing automatically, and the coupling
bolt causing serious injury to your hand.
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