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MAINTENANCE AND SERVICE
General
WARNING!
Most accidents involving machines occur dur-
ing trouble 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.
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.
If servicing operations require the motor to be in
operation, be aware of risks when working with
or in the vicinity of moving parts.
Perform maintenance and servicing in accordance
with this Operator’s Manual to avoid shutdowns and to
maintain the machine’s value.
Maintain the machine’s supplementary equipment and
tools as well.
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 author-
ized service workshop.
Use only original spare parts for repairs.
Measures to take in
advance of maintenance,
service and trouble shooting
General
• Ensure that the machine is situated in a safe area.
• Place the machine on a fl at surface with the arm
system and outriggers down.
• Several components heat up during work with the
machine. Do not commence any servicing or main-
tenance tasks until the machine has cooled.
• Set out clear signs to inform persons in the vicinity
that maintenance work is in progress.
• Ensure that the working area is suffi ciently illumi-
nated to create a safe working environment.
• Ascertain the location of fi re-extinguishers, medical
supplies and emergency telephone.
Protective equipment
• Wear personal protective equipment. See instruc-
tions under the heading ”Personal protective equip-
ment”.
• Use an approved lifting device to secure and lift
heavy machine parts. Also ensure that there is
equipment to secure machine parts mechanically.
Working environment
• The area around the machine must be free of dirt in
order to minimize the risk of slipping.
• Clean the machine. Dirt in the hydraulic system
leads rapidly to consequential damage and stop-
pages.
• Ensure that there is a suffi ciently large working
area.
Discharge stored energy
• Turn off the motor.
• Put the main switch in the OFF position (O).
• Disconnect the power cable and place it so that it
cannot be connected by mistake.
• When maintaining the track unit, discharge the
pressure in the accumulator. Refer to the directions
under ’Functional inspection” in the ’Maintenance
and service” section.
Discharge pressure in the hydraulic system
• Undo the air fi lter so that the overpressure in the
tank is discharged.
• Discharge pressure in the hydraulic cylinders by
taking the load off the arm system by resting it on
the ground.
• Wait until the pressure has decreased via internal
leakage.
• When maintaining the track unit, discharge the
pressure in the accumulator. Refer to the directions
under ’Functional inspection” in the ’Maintenance
and service” section.
Dismantling
• When dismantling machine parts, heavy compo-
nents can start moving or fall down. Secure moving
parts mechanically before loosening screw joints or
hydraulic hoses.
• Pipe and hose couplings can remain pressurized
despite the motor being switched off. Always
work on the assumption that the hoses are under
pressure when dismantling. Take great care when
undoing connections and use appropriate personal
protective equipment.
• Make sure to mark all cables and hoses that are
undone in conjunction with service and mainte-
nance in order to ensure correct reassembly.
Test running the machine
• The machine’s movements can be defective if a
terminal, cable or hose is incorrectly mounted.
Exercise caution during test runs and be prepared
to turn the machine off immediately in the event of
a fault.
English - 35