Control, operation

Working with the machine

Setting stroke limitation:

For a description, see chapter "Operator's menu", submenu "hbg max point".

Application of stroke limitation:

Fig. 3-91 Operating elements of the stroke limitation function Park the machine on level ground. Turn the key switch S249 to position 0. The stroke limitation function is activated. The following operating statuses are indicated on the display:

S249DisplayOperating status

0

0

0

Stroke limitation on

The stroke limitation function is activated. The working tool can only be lifted to the maximum permissible working height.

Stroke limitation, preliminary shut-down

The preliminary shut-down function slows down the upward movement of the working attachment before the maximum permissible working height is reached (indicator light H159 on).

Stroke limitation, shut-down

The shut-down point of the maximum permissible working height is reached. 0

Stroke limitation overridden copyright by

The stroke limitation function is overridden so that the working attachment can be moved without restrictions.

Overriding stroke limitation:

Danger!

Risk of injury and damage to equipment!

If the stroke limitation function is overridden, there is a risk of serious damage and injury, as the equipment might collide with another object.

When overriding the limitation function, operate the machine with extreme caution.

Press the switch S291

The stroke limitation function is temporarily overridden.

After the switch has been pressed, the equipment can be moved for 10 seconds to a height above the shut-down point.

The stroke limitation is automatically reactivated and the switch must be pressed again,

–if the attachment is moved back to the permissible operating range

–after a 10-second period has lapsed

3.5Installation and removal of attachment parts

3.5.1Safety Instructions

3.5.1.1Installation

And Removal Of Attachment Parts

–Equipment and attachment parts made by other manufacturers or those which do not have LIEBHERR’s general approval for installation may not be installed on the machine without prior written approval by LIEBHERR.

LIEBHERR must be provided with the required technical documentation necessary for this purpose.

–Set the machine on alevel and stable ground prior to any work with attachments.

–Lock the uppercarriage with the locking pin to the undercarriage.

–Do not position yourself under a raised attachment that has not been adequately and securely supported.

–Never place yourself under a machine while it is elevated.

–Remove hydraulic system pressure before working on any attachments (as described in this operating manual).

–Do not attempt to lift heavy parts. Use suitable lifting devices with sufficient load carrying capacity.

–Insure any lifting system or lifting device that is used is in good repair and adequately rated for the component or machine to be supported. Always wear work gloves when handling wire cables.

–When working on the equipment: Switch off the diesel engine, remove the key and turn the safety lever upward.

–During repairs: Make sure that the hydraulic lines are properly attached and that all fittings and connections are properly tightened.

–As soon as an attachment part is removed and supported, cover or cap the openings in the hydraulic circuit to prevent dirt infiltration. Permit only authorized persons near the machine or the lifting device.

Installation and removal of attachment parts

3.5.1.2Removal and installation of attachment pins

–Never use your fingers to align pin bores. If possible, always use a hydraulic pin pulling device to push out the pins on the attachment.

–If pins must be removed with a sledge hammer, use a punch and a guide tube held by another person.

–To drive out a pin, install the impact screw from the tool box in the threaded bore of the pin and hit the screw only.

–For the installation of a pin retained with castle nut and cotter pin, drive the pin in first to the stop, then install the castle nut by hand until contact and tighten it only to the point where the cotter pin can be installed.

3.5.2Installation and removal of digging tool

Fig. 3-92 Installation and removal of digging tools

The following is a description of the installation and removal of digging tools. Digging tools include backhoe bucket, ditch cleaning buckets or ripper.

3.5.2.1Removing the digging tool

Position the attachment in such a way that the entire bottom part of the digging tool is laying on the ground.

Unscrew the locking plate 5 and remove the locking plate 6 and knock out pin 3 and pin 4

If necessary, raise the attachment slightly when knocking out pin 4 to relieve it.

3.5.2.2Installing a new digging tool

Position the digging tool to be installed in such a way that its entire flat bottom is laying on the ground.

Start the engine and move the attachment until the bucket stick bearing and the bearing points 1 of the digging tool are aligned.

Guide in pin 4 and secure it with plate 6

Extend the bucket cylinder slowly until the bore hole in the connecting link 7 is located precisely between the bearing points 2

Guide in pin 3 and secure it with plate 5

Grease all lube points on pins 3 and 4 until clean grease emerges on the corresponding bearing points.

3.5.2.3Bucket cylinder operation

Two hydraulic lines on the stick are used either for bucket cylinder operation or grapple operation.

The lines are switchable via a valve block 15:

–

– a - Bucket cylinder operation (for digging tools) b - Grapple operation (for grapple, scrap cutter etc.)

Turn the both square head bolts on valve block 15 in such a way that the markings are positioned transverse to the travel direction (position a, bucket cylinder operation).

Note!

If the machine is equipped with a hydraulic quick change adapter and LIKUFIX, it is not necessary to switch between bucket cylinder operation and grapple operation. There is no valve block 15.

3.5.3Attachment of grapple to bucket stick

Danger!

Risk of injury

Ensure that the machine operator follows the instructions of the instructor when moving the equipment.

Two workers are required to attach or remove the grapple.

3.5.3.1Attaching grapple

Before attaching a clamshell grab or multiple grab, ensure that the necessary hydraulic lines for grapple operation are mounted to the bucket stick. The grapple must be in a stable position (grabs fully opened).

If necessary, dismantle the digging bucket.

Move the attachment in order to position the bucket stick between the bearing points of the grapple suspension 1

Insert the bolts 2 and secure them with the plate 3

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 and press the buttons of the "Rotate grapple" function).

Move the safety lever up.

Connect the hydraulic hoses 4 and 5 (for the supply of the grab cylinders) to the pipelines.

For grapples with hydraulic rotator, also connect the hydraulic hoses 6 and 7 to the pipelines for this auxiliary equipment.

3.5.3.2Attachment of connecting link

After the grapple has been removed, secure the connecting link 1. There are various ways to do this (depending on the machine equipment).

Fully retract the bucket tilt cylinder 6

Attach the holder 5 to the change lever 2

Insert the securing device 3 in the connecting link 1 and mount it to the holder 5. Insert securing plugs 4 on both sides.

Installation and removal of attachment parts

3.5.3.3Changeover to grapple operation

Fig. 3-95 Valve block for tilt cylinder operation / grapple operation

Two hydraulic lines on the bucket stick are used for the operation of the tilt cylinder or the grapple.

The lines are switchable by means of a valve block:

– a - Tilt cylinder operation (for digging buckets)

– b - Grapple operation (for grapples, scrap shears, etc.)

Note

If the machine is equipped with a quick-change adapter and LIKUFIX, there is no need for this changeover. The valve block is therefore omitted.

Turn the two square head screws on the valve block until the marks are aligned in the direction of travel (position b, grapple operation).

Complete all working movements several times without load (opening and closing grapple, moving grapple to the right and left) in order to let any trapped air escape from the hydraulic circuits.

3.5.3.4Removing grapple

If necessary, remove the securing device 3 from the connecting link. Fully open the grabs and place the grapple in a vertical position on level ground.

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 and press the buttons of the "Rotate grapple" function).

Move the safety lever up.

Disconnect the hydraulic hoses from the pipelines on the bucket stick. Immediately seal open lines to prevent dirt from entering the system.

Prop up the grapple to ensure that it cannot topple over.

Unscrew the plate 3 and carefully drive out the bolt 2. To do this, you might have to start the diesel engine and lift the attachment slightly from the ground.

3.5.4Hydraulic quick-change adapter (optional equipment)

The hydraulic quick-change adapter allows for the fast and efficient exchange of tool attachments without having to leave the operator's cab.

When operated in conjunction with the LIKUFIX quick-coupling system (optional equipment), the connecting lines are automatically connected and disconnected.

3.5.4.1Safety information

–First familiarise yourself with the functions and operation of the quick-change adapter (without attached tools).

–When attaching and removing tools, ensure that no persons are standing in the working area of the attachment.

–During mounting and removing, move the tool attachment only at minimum speed, and only if absolutely necessary.

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

–If the buzzer and the "quick-change adapter" indicator light are on and you are NOT carrying out an intended locking or release procedure, immediately shut down the machine. If these indicating elements are not on when you are carrying out an intended locking or release procedure, immediately stop the procedure. This can occur if a lock bolt has inadvertently become dislodged, or if a mechanical, hydraulic or electrical fault occurs. Only resume operation after the defective part has been repaired or replaced.

–Check the tool attachment every day to ensure that it is properly secured. In addition to the above check, carry out a dummy run with the tool attachment: Tilt the tool attachment in and out (without load), lifting it only as far as this is necessary to check proper connection (e.g. pin in bolt eye).

–The lifting capacity of the quick-change adapter or the integrated load lift hook might be greater or smaller than that of the basic machine. Always observe the load capacity values of the machine.

–While attaching or removing tool attachments, ensure that the magnet system (optional equipment) is switched off.

3.5.4.2Overview

1 Lock bolt (extended)

3 Load lift hook

2 Mounting hook for tool attachment

Installation and removal of attachment parts

3.5.4.3Operation and function control

To operate the quick-change adapter, you must simultaneously actuate two control elements (two-hand operation). With one hand, activate the quick-change adapter. Use the other hand to control the movement of the lock bolts.

During release, the "quick-change adapter" indicator light is on. This indicator light, together with a buzzer warning sound, indicates that the quick-change adapter is not locked.

Releasing and locking of quick-change adapter by means of push buttons (standard equipment):

* In machines with optional equipment, the quick-change adapter can be controlled by operating the left or right joystick.

The auxiliary function must be activated (switch S19).

Press and hold the button S47

The quick-change adapter is activated.

Press and hold the button R. A buzzer sound is emitted. The lock bolts are retracted. The "quick-change adapter" indicator light is on. The quick-change adapter is released.

Press and hold the button L The buzzer is off.

The lock bolts are extended.

The "quick-change adapter" indicator light is on. The quick-change adapter is locked.

Locking and releasing attachments with the mini joystick (optional equipment):

The mini joystick on the left joystick is used to operate the lock bolts. Press and hold the button S47

The quick-change adapter is activated.

Push the mini joystick to the right R and hold it there. A buzzer sound is emitted. The lock bolts are retracted. The "quick-change adapter" indicator light is on. The quick-change adapter is released.

Push the mini joystick to the left L and hold it there. The buzzer is off. The lock bolts are extended. The "quick-change adapter" indicator light is on. The quick-change adapter is locked.

3.5.4.4Attaching tools

The tool attachment must be placed on the ground in a stable position. Switch off the magnet system (optional equipment). Position the stick and the tool attachment. 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 tool attachment can be taken up with the mounting hooks.

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

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

Danger!

Risk of injury!

After the tool attachment is released, it is not any more secured to the machine. The tool attachment might thus become dislodged and cause serious injury.

Position the tool attachment 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). Check the tool attachment for proper fixture by carrying out a visual inspection.

3.5.4.5Removing tool attachment

The tool attachment must be in a stable position.

If the tool attachment cannot be placed in a stable upright position, it must be removed in a lying position. Switch off the magnet system (optional equipment).

Caution!

The hydraulic lines are under pressure!

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

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

Fully extract the bucket tilt cylinder.

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

Danger!

Risk of injury!

After the tool attachment is released, it is not any more secured to the machine. The tool attachment might thus become dislodged and cause serious injury.

Position the tool attachment 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.

Fig.

Placing the tool attachment on the ground

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

Installation and removal of attachment parts

Attach a different tool attachment. - alternativelyLock the quick-change adapter without attaching a tool to switch off the buzzer.

3.5.5Hydraulic 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.

1 Protective cover of quick change adapter

3 LIKUFIX hydraulic coupling at quickchange adapter

2 Protective cover of working tool

4 LIKUFIX hydraulic coupling at working tool

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.

3.5.6Mechanical quick-change adapter (optional equipment)

The mechanical quick-change adapter allows for the fast and easy exchange of working tools.

3.5.6.1Safety information

–First familiarise yourself with the functions and operation of the quick-change adapter (without attached working tools).

–Before locking or releasing the quick-change adapter, tilt the safety lever upwards.

–Ensure that the working tool cannot be moved by a third party while you carry out this task.

–When attaching and removing working tools, ensure that no persons are located in the working area of the tool.

–During mounting and removing, move the working tool only at minimum speed, and only if absolutely necessary.

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

–If required, use a pedestal or working platform to reach the locking bolts and connections. Do not stand on the working tool.

–Check the locking screw every day to ensure that it is properly tightened. In addition to the above check, carry out a dummy run with the working tool: Tilt the working tool in and out (without load), lifting it only as far as this is necessary to check proper connection (e.g. pin in bolt eye).

–The lifting capacity of the quick-change adapter or the integrated load lift hook might be greater or smaller than that of the basic machine. Always observe the load capacity values of the machine.

3.5.6.2Overview

3.5.6.3Releasing and locking

3-106 Releasing and locking

Turn the locking screw anticlockwise and remove it (A). Insert the crank into the locking bolt and turn it anticlockwise until both locking bolts are inserted to the stop (B). The quick-change adapter is released. Remove or attach the working tool. Insert the crank into the locking bolt and turn it clockwise until both locking bolts are screwed out to the stop (C). The quick-change adapter is locked. Turn the locking screw clockwise (D). The quick-change adapter is secured.

3.5.6.4Attaching working tool

3-107 Positioning attachment

The working tool must be placed on the ground in a stable position. Position the stick and the working tool. Fully retract the bucket tilt cylinder. Screw out locking screw. Release the quick-change adapter.

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!

Prior to locking, there is no secured connection between the working tool and the quick-change adapter. The working tool might become dislodged and cause serious injury.

Approach the quick-change adapter with great care.

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. Screw in the locking screw.

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.

Installation and removal of attachment parts

3.5.6.5Dismantling working tool

The working tool must be in a stable position. If the working tool (e.g. grapple) cannot be placed in an upright position, it must be removed in a horizontal position.

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.

Fig. 3-110 Aligning working tool for release

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.

Approach the quick-change adapter with great care.

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

Screw out locking screw. Release the quick-change adapter.

Fig. 3-111 Placing the working tool on the ground

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

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

3.6.2Preparation

2 Permissible working range with 10° distance to end position

4 Boom or stick

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.

3-115 Releasing excavated material

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

3-116 Grading 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).

Fig. 3-119 Risk of injury and damage to equipment due to incorrect operation of the hydraulic hammer

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

3 Hook for working tool (not suitable for load lifting operation)

A Permissible swivelling range

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)

3.6.11.1Introduction

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 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.

It remains however 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.

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

The load lift values in the table correspond to max. 75% of the tip load or 87% of the hydraulic lifting power according to ISO 10567.

In machines equipped with a backhoe bucke t attachment (without backhoe bucket, including bucket cylinder, change lever and connecting link), the values are applicable to the tip of the stick. When the machine is standing on firm and level ground and the oscillating axle is locked, the uppercarriage can be swivelled by 360°.

Note!

The load values also depend on any attached tools and attachments.

If the bucket cylinder, change lever and connecting link are removed, the load values are increased by approx. 240kg.

When using a quick-change adapter or working tools, deduct the weight of the components from the load values (see LIEBHERR type plate).

3.6.11.2Functional description

Danger!

When operating the machine to lift loads, always adhere to the relevant safety and accident prevention regulations. The overload warning system does not disable the machine as soon as a permissible load moment is exceeded. The operator is only informed that the limit value is exceeded.

The overload warning system consists of a constant pressure switch connected to the piston end of the boom cylinder.

If the load pressure in the boom cylinder reaches the switching pressure, the pressure switch generates a signal. This signal switches on the overload warning indicator light and triggers the buzzer sound.

The switching pressure of the pressure switch is set in such a way that the stability of the machine is not compromised, even if it is not supported.

3.6.11.3Start-up

Danger!

Risk of injury. If the overload warning system is defective, it is prohibited to lift loads. Employ a specialist technician to repair the overload warning system.

The overload warning system is activated by means of the switch S318

Press the switch S18 down.

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

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.

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

Extend the boom cylinder to the stop (lifting boom). Continue moving the joystick in direction "lifting boom". The indicator light of the overload warning system must be on. The buzzer signal must audible.

Note!

Deactivate the overload warning system when working with a digging bucket, as the great force used for such operations would constantly trigger the overload warning system.

Press the switch S18 up. The overload warning system is deactivated. The indicator light in the switch is off.

3.6.11.4Acknowledging 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.

3.7Parking and exiting machine

1 Brake pedal (operating brake) S263 Travel direction switch S16 Switch / parking brake

Before exiting the machine, apply the parking brake and release the operating brake. Set the travel direction switch S263 to its neutral position 0

Move the safety lever up. The parking brake S16 is applied. Switch off the diesel engine.

To release the operating brake 1: Release the retainer (see arrow), using your foot.

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 tyres, ramps and loading platforms. Remove the stick and/or working attachment, if required.

If required, use a suitable ramp. Angle of inclination: max. 15°

3.8.2.2Loading machine onto a low-loader

Danger!

The machine might slide sidewards 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 caution.

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. Press the switch S16 The parking brake is applied. The indicator light in the switch is on. Switch off the diesel engine.

Turn the ignition key to 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:

Danger!

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

Place chocks 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. 3-124).

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

3.8.3Loading with crane

Danger!

Risk of accident!

It is forbidden to stand on the lifted machine!

Danger!

Improper loading can result in shifting of the 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:

Lower the attachment, retract the stick and tilt in the digging bucket to the stop. Press the switch S16 The parking brake is applied. The indicator light in the switch is on. Switch off the diesel engine.

Turn the ignition key to 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 labelled as lashing points on the machine. Carefully lift the machine with the crane and place it on the transport vehicle. To restart the machine, strictly adhere to the instructions in the operator's manual.

Loading of machine with adjustable attachment:

Fig. 3-126 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.

Press the switch S16 The parking brake is applied. The indicator light in the switch is on. Switch off the diesel engine.

Turn the ignition key to 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 labelled as lashing points on the machine. Carefully lift the machine with the crane and place it on the transport vehicle. To restart the machine, strictly adhere to the instructions in the operator's manual.