RUNNING GEAR OPERATION
40
Operating instructions • Semitrailer • 505369471-04 • 02/2019
5.8.1
Service brake
INFO
Repeated operation of the service brake
when the supply lines are uncoupled uses
up compressed air from the air reservoir.
The trailer is then only partially braked
(depending on the air supply).
When the supply conduit is unhitched, the
trailer is automatically braked. The black
control knob on the control unit can be
used to release the service brake to man-
oeuvre the trailer without a connected com-
pressed air supply
trailer without a connected compressed air sup-
ply", pg. 34)
505821725-01
7
5
6
11
10
8
4
2
1
9
3
< 5"
7
5
6
11
10
8
4
2
1
9
3
+
> 5"
500626977-01
P
P
515040284-01
Senken / Stopp / Heben
Lower / Stop / Raise
Abgesenkt
Lowered
Fahrt
Drive
500626979-01
1
Fig. 5-18:
Service brake
1
Black control knob (manoeuvring)
Disengaging the service brake
► Press the black control knob.
ü
The service brake is disengaged.
ü
If the parking brake is also released,
the trailer is not braked.
Applying the service brake
► Pull out the black control knob.
ü
The service brake is applied.
ü
The trailer is partially braked (depend-
ing on the air supply).
Connecting the supply conduit will auto-
matically push out the black control knob to
the driving position again.
5.8.2
Parking brake
NOTE
Property damage by driving with the
parking brake applied!
Driving with the parking brake applied will
damage the trailer's brakes and axles
after a short time.
► Disengage the parking brake before
starting the trip.
The parking brake is its own brake circuit.
It is applied via the brake cylinder's spring
storage parts.
The parking brake must be actuated manu-
ally. Before unhitching and for parking, the
trailer must be braked using the red control
knob.
To tow or manoeuvre without compressed
air, the parking brake can be disengaged
with the emergency release system
"5.8.3 Emergency release devices for the park-
ing brake", pg. 41)
.
505821725-01
7
5
6
11
10
8
4
2
1
9
3
< 5"
7
5
6
11
10
8
4
2
1
9
3
+
> 5"
500626977-01
P
P
515040284-01
Senken / Stopp / Heben
Lower / Stop / Raise
Abgesenkt
Lowered
Fahrt
Drive
500626979-01
1
Fig. 5-19:
Parking brake
1
Red control knob (park)
Applying the parking brake
► Pull out the red control knob.
ü
The parking brake is applied
ü
The trailer is braked and can be
parked.