180
HINTS FOR MAINTENANCE
F_02_121 F_02_56
CHECKING THE PNEUMATIC SYSTEMS
FOR TIGHTNESS
− Fill the air storage tank to the maxi-
mum pressures
− With the engine stopped, the pressure
may not descend by more than 10 kPa
within a 10-minute period.
Check the pneumatic system for
tightness daily, before initiating
the drive with a trailer or semi-
trailer connected. In the event of
any failure in the braking system
or a drop of pressure below 450
kPa a warning light switches on
at the instrument dashboard.
PNEUMATIC BRAKE OPERATING
PRESSURE
In the twin- and single-hose versions,
the pressure of air on the coupling heads
(for the twin-hose version - red relief
valve) is 740 ± 20 kPa and max. 600 ±
20 kPa respectively (at the moment
when the governor relieves the com-
pressor - vents).
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