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SAFETY INSTRUCTIONS
Maintenance and service
Most accidents involving machines occur during trou-
ble shooting, service and maintenance as staff have
to locate themselves within the machine’s risk area.
Prevent accidents by being alert and by planning and
preparing the work. You can also refer to ’Preparations
for maintenance and service” in the ’Maintenance and
service” section.
• The user must only carry out the maintenance and
service work described in this Operator’s Manual.
More extensive work must be carried out by an
authorized service workshop.
• Never carry out repairs without having the neces-
sary expertise.
• Only trained service personnel are permitted to
intervene in the electrical or hydraulic systems.
• Use personal protective equipment as well as
equipment to mechanically secure machine com-
ponents during maintenance and service.
• Set out clear signs to inform persons in the vicinity
that maintenance work is in progress.
• If service operations or trouble shooting does not
require the machine to be switched on, the power
cable must be removed and positioned so that it
cannot be connected by mistake.
• Ensure there is no current to the machine by re-
moving the power cable before opening or remov-
ing the electric cabinet or any other component
that contains electrical current.
• Pipe and hose couplings can remain pressurized
despite the motor being switched off and the pow-
er cable disconnected. It must always be assumed
that hydraulic hoses are pressurized and they must
be opened with great care. Relieve the pressure on
the arm system by resting it on the ground and turn
off the electric motor before undoing the hoses.
• Never try to stop hydraulic fl uid leaking from a bro-
ken hose by hand. Finely dispersed hydraulic fl uid
at high pressure can permeate under the skin and
cause very severe injuries.
• When dismantling machine parts, heavy compo-
nents can start moving or fall down. Secure moving
parts mechanically before loosening screw joints or
hydraulic hoses.
• Use an approved lifting device to secure and lift
heavy machine parts.
• Several components heat up during work with the
machine. Do not commence any servicing or main-
tenance tasks until the machine has cooled.
• Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
• The machine’s movements can be defective if a
terminal, cable or hose is incorrectly assembled.
Exercise caution during test runs and be prepared
to turn off the machine immediately in the event of
a fault.
The machine’s
safety features
The machine’s safety features can be divided into
safety features for personal protection and those for
mechanical protection. Some of the safety features
provide both mechanical and personal protection.
WARNING!
Do not modify the machine’s safety devices and
check regularly that they are working properly.
The machine must not be driven if protective
plates, protective covers, safety switches or
other protective devices are not fi tted or are
defective.
Personal protection
Indication of zero position
If either of the joysticks is in an operative position
when the remote control is started, the function will be
blocked. The operator is informed of this by means of
an error message appearing on the screen. To reset
the function, the remote control must be turned off
and on again.
The function also protects against faults in the potenti-
ometer or cable breaks.
Signal voltage limitation
Signal voltage limitation prevents the machine execut-
ing unexpected movements in the event of a cable
breaking or a short-circuit.
The voltage level of the control signals is limited to
within a maximum and minimum value. If the voltage
level falls outside the permitted interval, the machine
stops.
Joystick guard
The safety feature reduces the risk of unintentionally
moving the machine by locking the control circuit if
the joysticks have been in neutral for three seconds.
The control circuit is activated by means of the left
button on the right joystick. It is activated when the
button is released. This guards against fi xing the but-
ton in an active position.
Radio block
If the remote control has been turned off for two
minutes the electronic unit in the machine is blocked
to radio signals. It is not possible to restart the ma-
chine until the supply voltage to the machine has been
turned off and on again.
The safety feature ensures that the operator knows
which machine will start and that the correct remote
control is being used for the machine. This is particu-
larly important when there are several machines at the
same workplace.
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