The black button is located under the
marked area in the image below.
The location of black button
Thanks to the service brake, the trailer
can be made maneuvers without air con-
nections. The black button can be used
only without semi-trailer air supply (red)
connections on the trailer.
When you push the black button, the
service brake will be disabled. When you
pull the black button, the service brake
will be activated.
If the service brake is used a
lot of times, without an air
connection, air pressure in
the system and braking power
may reduce.
When the air connections are de-
mounted, the service brake will be auto-
matically activated. When the air
connections are mounted, the service
brake will be automatically disabled.
The service brake is not sui-
table for braking of the semi-
trailer permanently. During
longer waiting periods, the se-
mi-trailer must be secured
with a spring-loaded park bra-
ke and with wheel chocks.
3.1.4.2. Park Brake
Spring loaded park brake
Spring loaded park brake control button
is used for longer parks of semi-trailers
with or without truck on plain or inclined
lands.
It is a spring force based brake. It does
not need air for braking. When the air
tube pressures of the trailer fall below
2.5 Bar, it is automatically activated and
the brake is activated with the spring
force.
When the red button is pulled, spring
loaded park brake will be activated.
When the operator push the red button,
spring loaded park brake is deactivated.
If the trailer air tubes are empty, the
brake cannot be disabled even if the but-
ton is pressed.
This brake will not be deacti-
vated automatically. Before
driving, the operator must
deactivate the brake.
3.1.5. Brake Chambers
Your vehicle may be equipped with disc
or drum brake axles according to your
choice. For both brake types, the brake
chambers are going to use for braking.
The brake chambers will be chosen
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