Transport and installation
36
4.2.3
Compressed air supply
Connection procedure:
Connect the coupling head of the
brake line (yellow
)
to
the yellow port on the tractor as prescribed.
Connect the coupling head of the
supply line (red
)
to the
red port on the tractor as prescribed.
When you connect the supply line (red), the supply pressure
from the tractor automatically pushes out the actuating button
for the release valve on the trailer brake valve.
Fig. 21
:
Standard couplings ISO 1728
When coupling the brake and supply line, ensure that:
o
The sealing rings on the coupling heads are clean.
o
The sealing rings on the coupling heads form a tight seal.
Replace any damaged sealing rings immediately.
Drain the air reservoir before your first journey of the day.
Do not set off with the coupled machine until the pressure gauge on the tractor shows a
pressure of 5.0 bar.
Disconnection procedure:
Secure the machine to prevent it rolling away.
You can do this using the parking brake and/or wheel chocks.
Undo the coupling head of the
supply line (red
)
as
prescribed.
Undo the coupling head of the
brake line (yellow
)
as
prescribed.
The service brake of the machine only engages when the red
coupling head has been removed.
You must follow the above sequence as, otherwise, the
service brake system will disengage, which in turn can set
the unbraked machine in motion.
Fig. 22
:
Standard couplings ISO 1728
When coupling or uncoupling the trailer, the supply line to the trailer brake valve is
vented. The trailer brake valve switches over automatically and actuates the service
brake system on the basis of the ALB brake force regulation.
Proceed in the same manner when coupling a second
trailer after the first.
Fig. 23
:
Connections at rear of trailer
This requires compressed air connections at the rear of the first trailer, along with an
automatic trailer coupling.
