RUNNING GEAR OPERATION
Operating instructions • Semitrailer • 505369471-04 • 02/2019
37
Disconnecting the Duo-Matic coupling
þ
The parking brake on the tractor unit is
applied.
þ
The parking brake on the trailer is ap-
plied
(see "5.8.2 Parking brake", pg. 40)
.
► Pull down the coupling head (trailer
part) lever and remove the coupling
head (tractor unit part).
► Disconnect the power supply (vehicle
lighting) and the brake power supply
(EBS).
ü
The supply and control connections
are disconnected.
Connecting C-coupling heads
1
2
Fig. 5-16:
C-coupling heads (trailer)
1
Supply compressed air coupling
2
Brake compressed air coupling
þ
The parking brake on the tractor unit is
applied.
þ
The parking brake on the trailer is ap-
plied
(see "5.8.2 Parking brake", pg. 40)
.
► Check the cleanliness and integrity of
the sealing surfaces on the coupling
heads. Clean if necessary.
► Always connect the brake compressed
air coupling first.
► Connect the supply compressed air
coupling.
► Connect the power supply (vehicle
lighting) and the brake power supply
(EBS).
ü
The supply and control connections
are now connected.
Disconnecting C-coupling heads
þ
The parking brake on the tractor unit is
applied.
þ
The parking brake on the trailer is ap-
plied
(see "5.8.2 Parking brake", pg. 40)
► Always disconnect the supply com-
pressed air coupling first.
► Disconnect the brake compressed air
coupling.
► Disconnect the power supply (vehicle
lighting) and the brake power supply
(EBS).
ü
The supply and control connections
are disconnected.
5.7
Draining the compressed air
tanks
!
WARNING
Risk of accident due to condensation
water!
Condensation water in the compressed air
tank can cause corrosion and affect the
functionality of the brake system and the
air suspension. Frozen condensation wa-
ter can lead to total failure of the brake
system and to serious accidents.
► Check the compressed air tank for the
presence of condensation water.
► Drain any existing condensation wa-
ter.
► Drain existing condensation water
more frequently in case of low or
strongly fluctuating outside temperat-
ures.
The tractor vehicles are fitted with air dry-
ers. This means that condensate in the
compressed air is largely prevented. Dur-
ing cold periods of the year, or when air
humidity is high, condensation water can