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292 Driving mode
With dual coupling head: remove the
#
compressed-air lines.
With dual coupling head: swing upwards and
#
release the lever on dual coupling head 6.
Without dual coupling head: disconnect reser‐
#
voir line coupling head
2
The brakes of the trailer/semitrailer will be
applied automatically.
Without dual coupling head: remove brake
#
line coupling head
1
(yellow).
Semitrailer truck: disconnect 24 V plug (15
#
pin)
4
from the trailer.
Platform vehicle: disconnect the power supply
#
of the trailer at the towing vehicle from 24 V
(15 pin) socket 4.
%
On trailers with a 12 V power supply: discon‐
nect the power supply of the trailer at the
towing vehicle from 12 V (13 pin) socket 7.
Semitrailer truck: disconnect ABS/BS plug
#
(5/7 pin)
3
from the trailer.
Platform vehicle: disconnect the connecting
#
cable from the trailer at the towing vehicle
from ABS/BS (5/7 pin) socket 3.
Semitrailer truck: when driving the semitrailer
#
truck without the semitrailer, insert the con‐
necting cable into empty socket 5.
Check the operation and cleanliness of the
#
lighting system as well as that of the turn sig‐
nals and brake lamps.
Semitrailer truck hydraulic system
Notes and control elements of the semitrailer
truck hydraulic system
& WARNING Risk of burning due to hot
hydraulic fluid
The hydraulic system is under high pressure
and the hydraulic fluid may be hot.
Hydraulic fluid can spray out under high pres‐
sure if work on the hydraulic system is not
performed correctly.
Always have work on the hydraulic sys‐
#
tem carried out at a qualified specialist
workshop.
& WARNING Risk of accident if the tipper
If you drive off with the tipper body raised, it
could get caught on buildings, bridges or
trees, for example.
(red).
#
* NOTE Damage to the hydraulic system of
Different types of hydraulic fluid are rarely
compatible although they are mixed from the
same oil base. Mixing hydraulic fluid types
always affects their characteristics, perform‐
ance and reactions.
Mixing different types of oil can result in dam‐
age to the hydraulic system of the tractor/
semitrailer combination.
#
* NOTE Operating the hydraulic system of
Notes on operating the hydraulic system of
the tractor/semitrailer combination:
R
R
R
Otherwise, the hydraulic system of the trac‐
tor/semitrailer combination and/or the
trailer hydraulic system may be damaged.
#
If using the hydraulic system of the tractor/semi‐
trailer combination, you many only operate tipper
semitrailers with a one or two line system. You
operate their hydraulic system with a pick-up
valve in the cab. The operating pressure of the
hydraulic system of the tractor/semitrailer com‐
body is raised while driving
Before driving off, always ensure that
the tipper body is lowered and properly
secured.
the tractor/semitrailer combination
The hydraulic fluid for the trailer hydrau‐
lic system must therefore match the
hydraulic fluid for the hydraulic system
of the tractor/semitrailer combination.
the tractor/semitrailer combination
the operating pressure of the hydraulic
system of the tractor/semitrailer combi‐
nation must not exceed the maximum
permitted operating pressure of the trailer
hydraulic system
the tipper semitrailer's hydraulic lines
must be connected
the low-speed splitter box must be activa‐
ted
Observe the notes on operating the
hydraulic system of the tractor/semi‐
trailer combination.
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