4
Operation
Operation
Depressurisation
When changing hydraulic components or
connecting operating equipment to the quick-
release couplings of the working hydraulics,
the hydraulic system must be depressurised.
e3861428a
Depressurisation takes place via a push
button in the overhead console. This releases
the pressure from the hydraulic system without
activating the pump motor.
For activation of depressu
risation, the follow-
ing conditions must be fulfi
lled:
• Seat switch activated
• Truck stopped.
• Parking brake applied
• No movement of steering wheel
• Joysticks in neutral position
To depressurise the auxi
liary hydraulics, the
push button must be unloc
ked and pressed.
Display_e0042a
The neutral yellow warning light (see arrow)
flashes in the display unit.
The joystick for the corresponding auxiliary
hydraulics must be actuated at the same time.
The current depres
surisation status is shown
by the neutral yell
ow warning light (see arrow)
in the display uni
t.
• Flash — ready for depressurisation via the
joysticks
• Steady light — pressure reduction in the
auxiliary hydraulics
• Flash — auxiliary h
ydraulics are depres-
surised
If the push button for depressurisation is
pressed and the accumulator is emptied, the
accumulator is charged once to make pilot
pressure for valve activation available in the
valve block.
After the truck has been switched off and
back on again, the pump is activated again
for accumulator charging as normal and the
neutral yellow warning light goes out in the
display unit.
152 Operating Instructions – 3888011701 EN – 12/2017
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