Mercedes-Benz Actros 2017, Operating Instructions Manual

Page: 330 / 436

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Operating lever
?
Tipper valve
Hydraulic connections
Connecting or disconnecting hydraulic
lines
Keep the hydraulic lines such that they can man-
age all movements when cornering etc. without
tensioning, kinking or rubbing. Before connect-
ing the hydraulic lines be sure that their screw
couplings are compatible with the sockets on
the towing vehicle. Do not use any tools when
connecting the hydraulic lines and do not climb
on any part of the vehicle.
Before coupling and decoupling the hydraulic
lines, the semi-trailer hydraulic system must be
depressurised and the trailer's tipper body
should be fully lowered. The semi-trailer hydrau-
lic system is only depressurised if the control
lever in the driver's cab is in the centre position
(STOP) and power take-off is disengaged. A few
drops of hydraulic fluid may escape when sep-
arating the hydraulic connections. Observe the
national work safety and accident prevention
regulations as well as the environmental pro-
tection regulations.
If the tipper semi-trailer is fitted with a two-line
system, connect the pressure line to connec-
tion
;
and the return flow line to connec-
tion
:
. If the return flow line is not coupled or
coupled incorrectly, it can result in damage to
the tipper semi-trailer's hydraulic system.
If the tipper semi-trailer is fitted with a one-line
system, connect the hydraulic line to connec-
tion
;
on your vehicle. Connection
:
for the
return line remains free in this case.
Connecting
X Make sure that the trailer hydraulic system's
operating pressure matches that of the semi-
trailer hydraulic system.
Select the high or low pressure setting on the
changeover unit for the operating pressure
(
Y
page 327).
X
Ensure that the control lever in the driver's
cab is in the central position (STOP)
(
Y
page 327).
X
Ensure that power take-off for the hydraulic
pump is switched off (
Y
page 341).
X Loosen dust protection caps from the con-
nections on the vehicle and from the hydraulic
lines.
X
Connect the hydraulic lines to the sockets
and tighten them hand-tight.
X Run a function check after connecting the
hydraulic lines.
Disconnecting
X
Ensure that the control lever in the driver's
cab is in the central position (STOP)
(
Y
page 327).
X Ensure that power take-off for the hydraulic
pump is switched off (
Y
page 341).
X
Place a cloth or a suitable receptacle under
each connection to take up the drops of
hydraulic fluid.
X
Loosen and disconnect the hydraulic lines on
the connections.
X Fasten the dust protection caps on the con-
nections on the vehicle and the hydraulic
lines.
X
Correctly dispose of collected hydraulic fluid.
Operating the hydraulic system
Tipping
X Engage power take-off for the hydraulic pump
(
Y
page 341).
The chassis frame is lowered automatically.
This increases stability. The display shows the
Û
symbol for chassis frames below driving
level.
X
Ensure that the low-speed splitter group is
selected.
X Pull up and hold the pull ring on the control
lever in the driver's cab (
Y
page 327).
328
Trailers/semitrailers
Driving mode