Control and operation

Attaching and dismounting equipment parts

Retract the bucket cylinder to its end position.

Caution!

With the bucket removed, the cylinder operates unloaded. Operate the cylinder movement slowly and carefully to prevent damage to the cylinder.

Put the attachment in position with the tool. Release hydraulic pressure as given in the related section. Push the safety lever up.

Connect the valves VA3 and VA4 to the hammer as follows: VA3 to the return port VA4 to the pressure port

If the two hammer ports are incorrectly connected, the hammer does not work.

1 Hydraulic hose connected to the hammer return-line filter

2 Hydraulic hose connected to the hammer

3 Not used (hydraulic hose connected to the valve block)

4Hammer return-line filter

VA5 Three-way valve

Caution!

Risk of damage!

Incorrect setting of the operating flow and/or pressure can cause damage to the attachment or limited operation of the attachment.

Do the procedure that follow to select the correct parameters for the tool that you will install.

You can also refer to the section "Menus and functions of the display".

Go to the monitoring menu "Check". Go to the submenu "Tool control".

Push the "Right" and "Left" buttons to highlight the parameters (1 to 10) related to the tool that you will install.

The parameters are shown by a white frame.

Push the "Accept" button to select it. The parameters are selected and shown by a green frame.

Push the "Accept" button again. The parameters are deactivated.

Then, a special message is shown in the menu "Diag".

The selection of the tool has no effect on the control mode (pedal or joystick).

Remove the tool

Retract the bucket cylinder to its end position. Release hydraulic pressure as given in the related section. Push the safety lever up. Close all the manual valves. Disconnect the hydraulic lines. Remove the tool.

3.6General working methods

3.6.1Minimum impact working methods for your machine

To increase the service life of the machine and avoid unnecessary damage and the resulting repairs, please note the following points: stopping the equipment on the walls of the ditch. the equipment is knocked against the material to be removed, in the longitudinal direction too, is not permitted. Repeatedly hitting the work equipment against rock or other hard material will damage steel parts and machine components. chion and work tool, the work tool could hit or break through into the cab. This could damage the cab and injure the main rocky material. This will extend the work cycles and could result in damage to the bucket and other machine components. rtner if special teeth are required for heavy or special applications. this should occur, slowly lower the machine to the ground. Do not permit the machine to lower quickly and do not intercept the falling movement using the hydraulics, since this could result in damage to the machine.

3.6.2Preparatory activities

Danger!

Risk of fatal injury and damage to the machine when working. erating instructions.

Position the machine so that the load or grab material can be taken up above the idler.

Danger!

Insufficient support and machine damage. Do not use a skimming shield to support the machine.

Danger!

Risk of fatal injury due to rotating the machine. Ensure that nobody stands within the hazard area r of the machine.

Caution!

Risk of injury when working.

Always wear safety shoes and, particularly when leaving the cab when demolition work is going on, a protective helmet and goggles.

Always wear the seat belt.

Use the horn to give a short warning signal before starting work.

3.6.3Working with the backhoe bucket

Danger!

Risk of fatal injury and damage to the machine when moving the backhoe type bucket.

Ensure that the backhoe type bucket is not slewed too close to the cab. erator.

Ensure that nobody is standing within the hazard area of the backhoe type bucket.

The machine must be in the working position.

Align the stick in such a way that its underside is at an angle of approximately 45° to the ground.

Align the backhoe bucket in such a way that its ground side can enter the ground at an angle of approximately 90°.

To lift out the grab material, slowly and evenly slew in the stick and slowly and evenly slew in the backhoe bucket simultaneously.

As soon as the stick is perpendicular to the ground, raise the boom slowly and evenly in addition to slewing in the stick and the backhoe bucket. Stopping suddenly will result in impact loads and vibrations.

When the backhoe bucket is full or the stick can no longer be slewed in, raise the boom and backhoe type bucket until the filled surface is parallel to the ground.

3.6.4Loading the transport vehicle

Danger!

Risk of fatal injury due to falling grab material.

Do not load the transport vehicle so high that the grab material could drop out over the walls of the vehicle.

Ensure that nobody is standing in the danger area or in the transport vehicle when loading.

If possible, the machine should stand higher than the transport vehicle to avoid having to lift the grab material unnecessarily.

Stop the transport vehicle in a position that allows it to be loaded from the rear or the side.

Slew the machine's equipment above the loading area of the transport vehicle. Distribute the grab material evenly over the loading area of the transport vehicle by slewing the backhoe bucket and stick out, slewing the uppercarriage and possibly also moving the boom.

If the backhoe bucket is not sufficiently emptied or there is still grab material in the backhoe bucket, slew the backhoe bucket in and out several times to loosen the grab material.

3.6.5Working with the shovel type bucket Digging

To maximise machine power and breakout, maintain grade and fill the bucket, correct digging angles and technique should be used.

Digging

Most digging should be started with the bucket almost fully crowded back (50mm off stops or end of cylinders).

When cleaning up or digging at floor level, angle the teeth aggressively to break out any toe that may be encountered.

Keeping the heel of the bucket off the ground therefore creating a void under the rear of the bucket.

Operate with the teeth and bucket lip doing all the work.

Note!

Avoid digging at right angles to the tracks.

Caution!

Each time the stick is crowded back to commence a cut, extreme caution must be taken not to hit the tracks.

The clam must always be closed when digging, although do not slam it shut. Avoid working on the cylinder limits and bucket stops during the digging cycle. Continual use of these practises will lead to premature failure of seals and Orings and can cause stress fractures to the clam, stick and bucket and damage to the boom and superstructure.

Crowd the bucket in (down) while closing the clam. This practise makes use of gravity to help minimise shock loading on the bucket cylinders.

Never dig, or attempt to bring down any material overhang, with the bucket while the clam is open or partly open.

Do not attempt to dig or clean the floor or face with the clam open. These practises can cause considerable damage to the clam cylinders.

Unload the shovel type bucket

3-110 Unloading of the bucket

When dumping the load, tip the bucket forward slightly as the clam opens. This helps direct the material to fall centrally into the tray and avoids spillage.

The position of the bucket backboard when the clam opens, directly affects the position of the load in the tray.

Bucket in ideal position resulting in material falling straight down. Loading centre of the haul truck.

3.6.6Working with the clamshell bucket (construction equipment)

Danger!

Risk of fatal injury and damage to the machine due to a swinging shell type bucket. Ensure that the shell bucket does not swing too close to the cab. The shell bucket could damage the cab when swinging and injure the ma-

Ensure that the shell bucket does not swing towards anyone in the working area. The shell bucket could injure people standing in the vicinity when swinging. Move the joystick slowly and evenly to prevent the shell bucket swinging. Hold the stick in such a way that the shell bucket cannot swing towards the machine when driving or braking.

Do not lift a load with the boom and stick extended too far and do not slew a heavy load too far to the left or right.

The stability of the machine could be affected.

The machine must be in the working position.

Open the grab shells fully. Lower the stanchion perpendicular to the excavation area.

Close the grab shells. Raise the stick slightly when doing this in order to reduce ground pressure.

Danger!

The device could lift out when closing the shell bucket.

Close the grab shells fully. Raise the boom.

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

Material

Slew the stick out as far as possible to prevent any risk due to the swinging grab. Open the grab shells, empty the grab material.

3.6.7Hoisting work

Hoisting work is understood as being lifting, transporting and unloading loads using a securing method (rope, chain etc.) and where personnel are required to assist in securing and unloading the load. This includes, for example, the lifting and unloading of pipes, shaft-top supporting rings or containers.

Danger!

The machine may only be operated for hoisting work if the prescribed safety devices are present and functioning correctly.

Machines used for hoisting work must be equipped with the following safety devices, in accordance with European standard EN 474-5:

Load take-up device for safe securing of a load (optional extra)

Safe take-up devices include for example lifting hooks which are mounted in place of the bucket. Lifting hooks can also be replaced with safety hooks welded to the bucket (to be approved by Liebherr).

Overload warning device (optional extra)

The overload warning device must alert the machine operator visually or acoustically if the permitted load value according to the load chart has been reached or exceeded.

Hose rupture protection on the hoist cylinders (optional extra)

The hose rupture protection must correspond with the requirements of ISO 8643. Load chart inside the cab

If the points referred to above are not or are only partially fulfilled, the machine may not be used for hoisting work.

3.6.8Working with the hydraulic hammer

Please also refer to the operating instructions provided by the manufacturer of the hydraulic hammer.

Danger!

The hydraulic hammer must be selected very carefully. Operating requires increased care and attention.

Only use hydraulic hammers approved by LIEBHERR. The use of a hydraulic hammer not approved by LIEBHERR could damage steel parts or other machine components.

Only use the hydraulic hammer to break up rocks, concrete and other breakable objects.

To avoid damaging the machine, do not try to break up rocks or concrete by moving the lever on the work equipment or by the hydraulic hammer. Do not use the drop power of the hydraulic hammer to break up rocks or other objects. Do not move objects with the hydraulic hammer. Do not lift the machine when using the hydraulic hammer. This could damage both the hydraulic hammer and the machine.

Do not use the hydraulic hammer to lift objects.

Only use the hydraulic hammer in t

Do not operate the hydraulic hammer in the direction of the machine, since exploding rocks or concrete could damage the machine and / or injure the driver.

Close all windows in the cab before working.

The machine must be positioned in the working position on level, solid ground. The stick may not stand vertically. No cylinder may be fully taken in or extended.

Do not operate the hydraulic hammer on the same spot continually or for longer than 15 seconds.

Overly continual operation of the hydraulic hammer leads to the hydraulic oil overheating unnecessarily. Change the position of the machine and resume hammering work.

Danger!

The stability of the machine could be affected. When using a hydraulic hammer, only work with the machine in area A

3.6.9Working

The machine must be in the working position.

Take the load up above the supported corners of the machine to attain maximum stability.

The maximum lifting capacity is attained when the load is taken up as close to the chassis as possible.