58
DRIVING OPERATION
F108 F_02_39 F_02_55
FRONT CARDAN BRAKE
If only one brake pedal is used,
the Cardan brake is not activated.
AIR BRAKES OF TRAILERS AND
SEMI-TRAILERS
The control of the air brakes of trailers
(semi-trailers) and the control of the trac-
tor brakes is designed in such a way that
the braking effect of both the vehicles is
synchronized.
The working pressure is set by the pres-
sure controller to 740 ± 20 kPa. If the
pressure drops below 550 - 40 kPa, the
relief valve puts the secondary devices
(differential lock, engagement of the front
driving axle, etc.) out of operation.
WARNING INDICATION OF AN AIR
PRESSURE DROP
A pressure drop below 450 kPa is sig-
nalled by lighting up of the red indicator
located on the dashboard.
In case of a pressure drop below
450 kPa in the air pressure sys-
tem a tractor with a braked trailer
or semi-trailer must not continue
travelling until the air pressure in-
creases again.
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