Power Hydraulics - Mercedes-Benz Unimog Operating Instructions Manual

Problems connecting hydraulic lines to working hydraulics circuit II
Problem
The hydraulic lines of
the equipment fitted
cannot be connected to
the hydraulic connec-
tions of working
hydraulics circuit II.

Power hydraulics

! Only switch on the power hydraulics when
connected to an item of attached equip-
ment. There is otherwise a risk of damage
to the power hydraulics.
You must switch off the power hydraulics
when you have finished using the equip-
ment and when you are transporting it.
! If a cell is activated, the corresponding
hydraulic connections at the front and rear
of the vehicle will be pressurised. There-
fore, do not simultaneously use equipment
connected at the front and rear hydraulic
connections for the same hydraulic circuit.
Possible causes/consequences and M Solutions
The pressure in the hydraulic lines of working hydraulics circuit II
is too high.
X
Switch off the engine.
X
Turn the key to position 2 in the ignition lock.
X
Vehicles with gear pump: briefly switch working hydraulics
circuit II to standby mode (
The pressure is decreased in the hydraulic line of working
hydraulics circuit II.
or
X
Vehicles with positioning pump: briefly switch front working
hydraulics circuit II (
hydraulics circuit II (
The pressure is decreased in the hydraulic line of working
hydraulics circuit II.
Hydraulic connections
Y page 253).
Y
page 256) or side and rear working
Y
page 257) into standby mode.
Vehicle front with circuit III
Red hydraulic connection, pressure line,
:
circuit III
Red hydraulic connection, return line, cir-
;
cuit III
Black hydraulic connection, free return
=
233
Z