RUNNING GEAR OPERATION
Operating instructions • Semitrailer • 505369471-04 • 02/2019
41
Disengaging the parking brake
!
WARNING
Possible risk of accidents when releas-
ing the parking brake with the service
brake released at the same time!
The trailer is not braked if the parking
brake and the service brake are released
at the same time. The trailer is not braked,
it can roll away and cause an accident.
► Only release the service and parking
brake at the same time when a towing
or manoeuvring vehicle is connected
to the trailer.
► Additionally secure the trailer with
wheel chocks when parking or stand-
ing on slopes.
INFO
The parking brake does not disengage
automatically. Prior to starting off it must
be disengaged manually.
þ
The trailer is hitched.
þ
The supply and control lines are con-
nected.
► Press the red control knob.
ü
The parking brake is released and the
trailer is not braked.
5.8.3
Emergency release devices for
the parking brake
!
WARNING
Risk of accident due to rolling away!
When the emergency release device is
activated, the parking brake does not
function. When it is not braked, the trailer
can roll away and cause serious injuries
and material damage.
► Only release the service and parking
brake when a towing or manoeuvring
vehicle is connected to the trailer.
► Use wheel chocks to prevent the
trailer from rolling away.
► Insert the emergency release screw in
its holder before starting to drive.
!
WARNING
Risk of accidents when driving with the
emergency release screw!
Driving with the emergency release screw
fitted can make the brake system inoper-
ative and result in accidents.
► Ensure that the emergency release
screw has been returned to the park-
ing position before driving off again.
If the compressed air for the parking
brake's spring storage fails due to a defect,
the braking effect can be cancelled via an
emergency release device on the brake
cylinders.
The spring storage of the brake system
can be operated without compressed air
using the emergency release device. When
the emergency release device is activated,
the spring storage is clamped on each
wheel and the parking brake is opened. By
doing so, the trailer can be towed or man-
oeuvred.
INFO
The shape of the spring storage can vary
according to the model and differ from the
figure shown.