Control, operation

Installation and removal of attachment parts

Releasing and locking:

Fig. 3-98 Overview of control elements

The auxiliary function must be activated (switch S19). Press and hold the button S47 The quick-change adapter is activated. Press and hold the right button R The buzzer sounds. The locking bolts are retracted. The quick-change adapter is released. Press and hold the left button L. The buzzer is off. The lock bolts are extended. The quick-change adapter is locked.

The quick-change adapter indicator light and the buzzer (warning signal) are on, indicating that the quick-change adapter has been released or is not properly locked.

3.5.5.4Attaching working tool

Fig. 3-99 Positioning attachment

The working tool must be placed on the ground in a stable position. Switch off the magnet system (if installed). Position the stick and the working tool. Fully retract the bucket tilt cylinder. Release the quick-change adapter. Release all buttons.

Position the quick-change adapter in such a way that the working tool can be taken up with the mounting hooks.

Lift the working tool a little from the ground and fully extend the bucket tilt cylinder until the bearing plate of the working tool touches the stop of the quick-change adapter.

The bores of the quick-change adapter and the working tool must be properly aligned.

Danger!

Risk of injury!

Before the working tool is locked, the working tool and the adapter are not properly connected. The working tool might become dislodged and cause serious injury. Position the working tool as little above the ground as is necessary before starting the locking procedure, in order to avoid dangerous movements.

Lock the quick-change adapter. Release all buttons.

Caution!

The hydraulic lines are under pressure. Before connecting the hydraulic lines, depressurise them using the joystick (switch off diesel engine, turn ignition key to contact position, operate the joystick).

Connect all hydraulic or electrical lines (e.g. for the attachment of a grapple). The safe mounting of the working tool must be checked with a proper visual inspection.

3.5.5.5Dismantling working tool

The working tool must be in a stable position.

If the working tool cannot be placed in an upright position, it must be removed in a lying position.

Switch off the magnet system (if installed).

Caution!

The hydraulic lines are under pressure.

Before disconnecting the hydraulic lines, depressurise them using the joystick (switch off diesel engine, turn ignition key to contact position, operate the joystick).

Disconnect all hydraulic or electrical lines to the working tool (e.g. for the removal of a grapple).

Fully extract the bucket tilt cylinder.

Place the working tool in a slightly elevated position from the ground.

Danger!

Risk of injury!

After the working tool is released, it is fully disconnected from the machine. The working tool might become dislodged and cause serious injury.

Position the working tool as little above the ground as is necessary before starting the release procedure, in order to avoid dangerous movements.

Release the quick-change adapter. Release all buttons.

The Working Tool On The Ground

Slowly retract the bucket tilt cylinder and lower the working tool to the ground.

Attach the other working tool. - alternatively -

To switch off the buzzer, lock the quick-coupling system without attaching a working tool.

3.5.6Hydraulic quick-change adapter with LIKUFIX (optional equipment)

The LIKUFIX quick-coupling system allows for the fast and efficient exchange of working tools without having to leave the operator's cab. Hydraulic and electrical connections are thereby automatically disconnected and connected.

For mounting and dismantling instructions, see chapter "Hydraulic quick-change adapter". Please observe the following additional instructions:

Before attaching the device, remove the protective covers.

Always keep the hydraulic couplings clean.

Before connecting the tool, check the connections for dirt. If necessary, clean all coupling parts and sealing surfaces with a clean cloth and oil.

When connecting or disconnecting the hydraulic coupling, proceed slowly and with the necessary care.

Tilt the quick change adapter at the attachment so that the coupling plates can easily be connected due to the weight of the working tool.

After completion of the work, and especially before transport, mount the protective covers.

Note!

If the hydraulic coupling cannot be easily connected to each by their own weight, check whether a foreign object (stone, etc.) is jammed between the parts. If this is the case, clean the coupling parts to prevent damage through subsequent coupling.

3.5.6.1Acknowledging buzzer signal (warning signal)

After the working tool has been removed, the buzzer (warning signal) sounds as long as the system is not locked.

If the overload warning system is switched on, the warning buzzer can be acknowledged.

If no working tool is to be mounted, it is useful to deactivate the warning signal. This is also recommended to ensure that another buzzer sound (i.e. from the overload warning system) is actually audible.

Press the switch S360

The buzzer is switched off. The "quick-change adapter" icon remains displayed.

Note!

The acoustic warning signal is automatically reactivated when the system is locked again.

In order to activate the warning buzzer, lock the system once. The buzzer and warning sound are on at the next release process.

3.6General working methods

3.6.1Tips for the proper operation of the machine preventing damage and wear

In order to prolong the service life of the machine and to prevent avoidable damage, observe the following instructions:

–When moving the machine into a ditch, do not halt the swivelling upper carriage by moving it or the attachment to the ditch walls.

–Do not drive the attachment against the material to be removed - also prevent impact in longitudinal direction. Repeated impact of the working attachment against rock or other hard materials results in damage to the steel structure and the machine components.

–Under certain circumstances, where a particular type of boom, stick and working tool are combined, there is a risk that the tool might collide with the operator's cab. This can result in damage to the operator's cab, and the operator might suffer injury.

–When working in rocky areas, do not use large-size buckets or side walls. Such equipment would result in prolonged working cycles, and there is also a risk of damage to the bucket and other machine components.

–Contact your LIEBHERR agent for advise on special gear solutions for heavyload or special applications.

–Do not use the swivel bearing to drill holes into the material.

–Do not lift the machine by propping it up with the attachment. If this happens by accident, slowly lower the machine back to the ground. Do not lower the machine quickly onto the ground, and do not attempt to dampen this movement with the hydraulics, as this can damage the machine.

Caution!

Incorrect operation of the attachment (e.g. backhoe bucket, concrete crusher, scrap shear, hydraulic hammer, swivelling rotator, stick extension) might result in an excessive load of the attachment.

The load on the attachment is greatest –when the hydraulic cylinders are fully retracted (in end position) –when the hydraulic cylinders are fully extended (in end position) –when the attachment is fully extended There is a risk of damage to parts of the attachment, to the hydraulic cylinders and to the machine.

Do not fully extend or retract the hydraulic cylinders.

When the hydraulic cylinders are near the end positions (limit range), move them only slowly and with great caution.

When swivelling the attachment, maintain a minimum distance of 10° to the end position to the tilt cylinder.

1 Possible swivel range

3 Limit range

5 Hydraulic cylinder

2 Permissible working range with 10° distance to end position

4 Boom or stick

3.6.2Preparation

Danger!

Insufficient support and damage to the machine. Do not use the dozer blade to support the machine.

Danger!

Risk to life and limb when the machine is swivelled. Ensure that no persons are standing inside the danger area r of the machine.

Caution!

Risk of injury during work.

Always wear safety footwear. When leaving the cab during demolition work, wear a hard hat and protective goggles. Always wear the safety belt.

Before starting work, operate the horn to warn other workers.

Position the machine in such a way that the load or the excavated material can be borne by the rigid axle or the idler.

When using a mobile machine, lower the support, if possible, and lock the oscillating axle.

3.6.3Working with the backhoe bucket

Danger!

Risk to life and limb! Risk of damage to machine during movement of the backhoe bucket. The backhoe bucket can collide with and damage the operator's cab and injure the operator.

Prevent the backhoe bucket from swinging near the operator's cab.

Ensure that no persons are standing in the danger area of the backhoe bucket.

Note!

If the parking brake is applied, the forces occurring during excavation work could damage the travel gearbox.

When working with the backhoe bucket, do not apply the packing brake S16 Use only the working brake (foot pedal).

Aligning bucket stick and backhoe bucket (1):

Align the bucket stick in such a way that its bottom side is at an angle of approx. 45° to the ground.

Align the backhoe bucket in such a way that its bottom side enters the ground at an angle of approx. 90°.

Lifting the excavated material (2):

To lift the excavated material, slowly swivel in the bucket stick at a uniform pace, while slowly swivelling in the backhoe bucket.

As soon as the bucket stick is at a right angle to the ground continue swivelling in the bucket stick and the backhoe bucket while slowly lifting the boom. Abrupt stops can cause vibration and unnecessary impact stress.

Lifting excavated material (3):

If the backhoe bucket is filled, or if the bucket stick cannot be swivelled in any further, lift the boom, swivel in the backhoe bucket until the filled surface is aligned parallel to the ground.

3.6.4Loading transport vehicle

Danger!

Risk to life and limb from falling excavated material.

Do not overload the transport vehicle and ensure that the load cannot fall from the platform.

While loading the vehicle, ensure that no persons are in the danger area of the excavator or in the transport vehicle.

Never swivel the equipment over the driver's cab.

If possible, position the machine at a higher point than the transport vehicle, in order to avoid unnecessary lifting of the excavated material.

Position the transport vehicle in such a way that it is accessible from the rear or the side.

Swivel the attachment across the loading platform of the transport vehicle. Distributed the excavated material evenly across the loading platform of the vehicle. To do this, swivel out the backhoe bucket and the bucket stick while swivelling the uppercarriage. If necessary, also move the boom.

To remove excavated material from the backhoe bucket: Repeatedly swivel the backhoe bucket fully in and out so that it is completely emptied.

3.6.5Grading work

Grading work can be completed with the digging bucket or a dozer blade (optional equipment).

Put the machine into its working position. Ensure that the supports are lifted.

Danger!

There is a serious risk of injury when the machine is moved. Ensure that no persons are standing in the working area of the machine.

Caution!

Risk of damage to the machine.

Do not move the machine while the attachment is in contact with the ground.

To carry out grading work with the backhoe bucket, place the flat side of the bucket on the ground and slowly move the stick forward and back. During the stick movement, move the boom up and down at a slow even rate.

If the machine is equipped with a dozer blade (optional equipment), lower the blade to the ground and slowly move the machine forward and back.

3.6.6Working with grapples

Danger!

Risk to life and limb or damage to the machine by swinging grapple:

–The grapple can collide with and damage the operator's cab and injure the operator.

–The grapple can also injure other persons.

–A swinging grapple can also affect the stability of the machine. Prevent the grapple from swinging near the operator's cab.

Ensure that the stick is in a position where the grapple cannot collide with the machine when the excavator travels or when the brakes are applied. Move the joystick slowly and smoothly to prevent swinging of the grapple. Ensure that the moving grapple cannot collide with persons. Do not lift heavy loads with a fully extended boom and stick. Do not move loads to the far right or left.

Observe the load lift chart showing the permissible lift loads that can be attached to the end of the stick, depending on its actual extension.

3.6.7Excavating and moving material with grapples

Put the machine into its working position.

Align stick (1):

Open the claws fully.

Lower the stick vertically to excavated area.

Closing jaws (2):

Danger!

When being closed, the clamshell bucket might lift the machine. As a result, the machine might inadvertently roll away.

Avoid situations where the machine could become unstable by lifting the equipment sufficiently before closing the grapple.

Close the jaws.

Lift the stick only slightly in order to relieve the pressure on the ground.

To lift excavated material (3): Close the jaws.

Lift the boom.

Move the machine to the unloading area (e.g. transport vehicle).

Releasing excavated material

Swivel the stick as far possible in order to prevent any risk from the slewing bucket.

Open the jaws and release the excavated material.

3.6.8Working with the hydraulic hammer

Danger!

Incorrect use of the hydraulic hammer can cause serious injury to persons or damage to the equipment.

The use of unapproved hydraulic hammers might also result in damage to steel construction parts and other machine components.

Use only hydraulic hammers that have been approved by LIEBHERR and always adhere to all instructions of the manufacturer.

Before starting working with the hammer, close all windows of the operator's cab.

Hydraulic hammers may only be used for the breaking of stones, concrete and other similar breakable material.

Do not attempt to break up stone or concrete by means of lever movements of the attachment or the hydraulic hammer.

Do not let the hydraulic hammer drop to break materials by means of impact.

Do not attempt to move objects with the hydraulic hammer. Do not lift the machine by propping it onto the hydraulic hammer.

Never point the hydraulic hammer against the machine, as broken off material could damage the machine and even injure the operator).

Position the machine on firm and level ground

Ensure that the stick is not in a vertical position. None of the cylinders may be fully extended or retracted. Carefully mount the hydraulic hammer and operate it.

Do not continue hammering the same point for a prolonged period of time. Do not operate the hammer continuously for more than 15 seconds. Move the hydraulic hammer frequently (to prevent overheating of the hydraulic oil from continuous operation).

If necessary, move the machine and change the angle of impact of the hammer.

Danger!

The stability of the machine might be compromised when a hydraulic hammer is attached.

Operate the hammer only in longitudinal direction of the machine. When using a hydraulic hammer, operate the machine only within the range A.

3.6.9Load lifting operation

Load lifting operation includes all manoeuvres where loads attached to the machine with lifting tackle (cables, chains, etc.) are lifted, transferred and lowered, whereby the load must be attached manually to the machine. Loading operations thus also include lifting and lowering of pipelines, shaft rings and vessels.

Danger!

The machine may only be used for lifting operations, if it is equipped with the necessary safety devices and when these devices are in proper working order.

According to the European standard EN 474-5, machines used to lift loads must be equipped with the following safety devices:

– Lifting tackle that allows for the safe attachment of a load (optional equipment)

An example of a safe lifting tackle are lift hooks that are attached to the machine instead of the digging bucket. Load lift hooks may be replaced with safety hooks welded to the digging bucket.

Overload warning system (optional equipment)

If the actual load reaches or even exceeds the permissible load according to the load lift chart, the overload warning system must generate a visual and audible alarm signal to the machine operator.

– Pipe fracture safety valve at the boom cylinders

The pipe fracture safety valve must conform to the requirements laid down in ISO 8643.

–Load lift chart in the operator's cab

If one or more of the above requirements is not met, the machine may not be used for load lifting operations.

3.6.10Use of quick-change adapter for load lifting operation

1

3

A

2

The quick-change adapter is equipped with two integrated load lift hooks for lifting operation.

The maximum lifting capacity of the individual load lift hooks is indicated at the quickchange adapter. The load capacity might be below or above that of the basic machine. Always observe the load capacity values of the machine.

Load-lifting work can be carried out with or without an attached working tool. If a working tool is mounted and the machine is used to lift loads, we recommend fully retracting the locking pins. This prevents that the lifting tackle is deflected by the locking pins, as this could cause damage.

Danger!

If a load is lifted incorrectly, it might become dislodged, which in turn could result in serious accidents.

To lift loads, always use the load hooks 1 and never the hook for the working tool.

Adjust the quick-change adapter position so that the load hook 1 opens upwards and is within the permissible swivel range A.

Attach the load to the load hook according to the instructions in chapter "lifting operation".

3.6.11Overload warning system (optional equipment)

3.6.11.1General

The overload warning system warns the machine operator with a visual signal (indicator light overload warning) and an acoustic signal (buzzer sound) when the permissible maximum load is reached.

The overload warning system therefore helps prevent dangerous situations where the permissible load moment is inadvertently exceeded. In the event of a warning signal, reduce the extension of the attachment or lower the load to the ground without increasing the extension.

Even if the overload warning system is used, it remains the responsibility of the machine operator to ensure that only loads of a known weight that is below the maximum permissible load of the machine are lifted. Also observe the applicable statutory accident prevention regulations.

The permissible maximum load depends on the machine equipment (undercarriage, attachments) and is shown on the load table in the operator's cab.

When the machine is standing on firm and level ground, the above values allow for the swivelling of the uppercarriage by 360°.

The load capacity values in the table correspond to max. 75% of the tip load or 87% of the hydraulic lifting force according to ISO10567.

If the overload warning system is defective, it is prohibited to lift loads. The system must be repaired by a specialist technician.

Note!

The load capacity values might vary, depending on the mounted tools and attachments.

Note!

The overload warning system must be tested prior to the commissioning of the machine and then every year by a specialist technician, in accordance with the testing and setting installations in the service manual.

3.6.11.2Operating principle

The overload warning system consists of a pressure switch connected to the piston side of the hoist cylinders.

If the hydraulic pressure in the hoist cylinders reaches the limit value, the pressure switch generates a signal. This signal switches on the overload warning indicator light and triggers the buzzer sound.

The limit value is set within the range of the stability factors.

3.6.11.3Commissioning

Danger!

The overload warning system does not disable the machine when the permissible load moment is exceeded. The operator is only informed that the limit value is exceeded.

When the overload warning system has been triggered, do not exceed the load or outreach.

Press the switch S18 down. The overload warning system is activated. The indicator light in the switch is on.

3.6.11.4Functional test

Before each shift, the machine operator must check whether the overload warning system is working properly:

Lift the boom and extend the hoist cylinders to the stop. Continue moving the joystick in direction "lifting boom". The indicator light of the overload warning system must be on. The buzzer must sound.

3.7Parking and exiting machine

Shut down the diesel engine. Turn the ignition key to contact position. Release the pressure from the pressure lines by carefully moving the joystick several times.

Move the safety lever up. The parking brake is applied. The slewing gear brake is applied.

Remove the ignition key.

Close all doors, hoods and covers of the machine and lock them.

3.8Transport

3.8.1Safety instructions

–Insure that the transporting vehicle or truck trailer is rated for the intended machine weight and size.

–Park the machine on alevel surface and chock the track chains and/or wheels.

–During transport, remove parts of the attachment that create an over width or length condition, if necessary.

–Clean the undercarriage. The undercarriage must be swept clean, meaning, the chains / wheels must be free of snow, ice and sludge prior to driving onto the transporting vehicle.

–Align the machine precisely with the loading ramp.

–Attach the manual lever for sensitive driving (crawler excavator) to the driving pedals.

–Have another person guide and signal the operator.

–On wheel models equipped with an uppercarriage locking mechanism, the uppercarriage must be secured to the undercarriage with the locking pin after loading onto the trailer.

–Secure the machine and any loose components with tiedowns in accordance with any applicable national regulations.

–Release all pressure lines (as described in this operating manual), remove the ignition key and pull the safety lever up prior to leaving the machine.

–Close all cab and panel doors.

–Verify that no one remains on the machine during the transport.

–Investigate the travel route, specifically in reference to limits for width, height and weight prior to the transport.

–Pay special attention when driving under electrical lines and bridges and when passing through tunnels.

–Use the same care for unloading as for loading.

3.8.2Transportation on low-loader

3.8.2.1Preparation

Prior to driving the excavator onto a low-loader, make the following preparations: Hold wheel chocks ready.

Remove dirt, ice and snow from the chains, ramps and loading platforms. Remove the stick and/or working attachment, if required. If required, use a suitable ramp. Angle of inclination: max. 15°

Attach the supplied manual levers (1 and 2) to the chassis pedals.

Danger!

The machine might slide sideward or tip over while being moved onto the lowloader.

This can lead to injury to persons or damage to property. Drive and steer the machine with extreme care.

If necessary, disconnect the semi-trailer from the tractor vehicle. Position the machine in line with the low-loader and drive onto the platform. Connect the semi-trailer to the tractor vehicle and lift low-loader. Lower the boom.

Switch off the diesel engine.

Turn the ignition key to its contact position and depressurise all pressure lines by carefully operating the joysticks repeatedly in all directions.

Remove the ignition key and tilt the safety lever upwards.

Close all doors, hoods and covers of the machine and lock them. Fold in the rear mirror.

Secure the machine:

3-117 Securing the machine

Danger!

Shifting of the machine on the low-loader can result in serious accidents. Secure the machine against shifting.

Place chucks at the wheels and secure the equipment with cables and chains.

Using tension chains, secure the machine by attaching the chains to the points labelled as lashing points (see Fig. 3-117).

Secure the cables and chains at the provided points on the low-loader.

3.8.3Loading with crane

Danger!

Risk of injury!

It is forbidden to stand on the lifted machine!

Danger!

Improper loading can result in shifting load.

Employ only experienced personnel with the attachment of the load and the guiding of the crane operator.

The signaller must be positioned within sight of the crane operator. Alternatively, the signaller and the operator might be in contact through walkie-talkies or similar devices.

Ensure that the crane tackle is sufficiently long. Use only suitably dimensioned lifting gear. We recommend using special lifting gear available from LIEBHERR.

Loading of machine with gooseneck boom:

3-118 Attachment of machine with gooseneck boom

Lower the attachment, retract the stick and tilt in the digging bucket to the stop. Switch off the diesel engine.

Turn the ignition key to its contact position and depressurise all pressure lines by carefully operating the joysticks repeatedly in all directions.

Remove the ignition key and tilt the safety lever upwards.

Close all doors, hoods and covers of the machine and lock them.

Fold in the rear mirror.

Attach the lifting tackle to the points provided.

To recommission the machine, strictly adhere to the instructions in the operator's manual.

Loading of machine with adjustable attachment:

Fig. 3-119 Suspension of machine with adjustable attachment

Lower the attachment, place the stick in a vertical position and tilt in the digging bucket to the stop.

Switch off the diesel engine.

Turn the ignition key to its contact position and depressurise all pressure lines by carefully operating the joysticks repeatedly in all directions.

Remove the ignition key and tilt the safety lever upwards.

Close all doors, hoods and covers of the machine and lock them.