Control, operation

General working methods

Closing the clamshells (2):

Danger!

When closing, the shell type bucket can lift the machine. The machine could roll away!

Avoid lifting the machine when closing the grab, by raising the stick sufficiently.

Close the clamshells.

Raise the stick slightly to reduce ground pressures.

Lifting digging material (3): Close the clamshells fully. Raise the boom.

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

Emptying digging material

Push the stick out as far as possible to avoid danger due to the oscillating grab. Open the clamshells, dump the digging material.

3.6.7.2Multiple tine grab (industrial equipment)

The machine must be in working position.

Taking up the load

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

Fig. 3-91 Transporting a load

Transport the load close to the chassis, but with a sufficient safety distance to the cab (oscillating grab!) and as close to the ground as possible.

Caution!

Particularly when handling wood, it can be necessary, when working with a grab, to move the machine with raised attachment and suspended load. This will shift the center of gravity of the machine upward in vertical direction. The travel behaviour of the machine will be negatively affected.

Observe chapter 'Safe operation in material handling application'.

3.6.8Load lifting work

Load lifting work is understood to mean lifting, transporting and unloading loads using a lifting device (rope, chain etc.), where personnel are required to assist in securing and releasing the load. This includes, for example, the lifting and lowering of pipes, shaft rings or containers.

Danger!

The machine may only be operated for load lifting work if the specified safety devices are present and functioning correctly.

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

– Load lifting devices to safely secure / lift a load (option)

Safe lifting devices include, for example, load hooks which are mounted instead of the digging tool. Load hooks can also be replaced with safety hooks welded to the digging tool.

– Overload warning device (option)

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.

– Pipe fracture safety valve on the hoist cylinders (option)

The pipe fracture safety valve must meet with the requirements of ISO 8643.

– Load chart inside the cab.

If the points referred to above are not or are only partially fulfilled, then the machine must not be used for load lifting work.

3.7Transport

3.7.1Transporting the machine safely

–Due to the space restrictions during transport, use only suitable transporting and lifting devices with sufficient capacity

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

–If necessary, remove parts of the attachment during transport.

–The ramp to drive onto the transporting vehicle should not exceed an inclination of 30° and be provided with awood covering to prevent sliding.

–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 ramp.

–Align the machine precisely with the loading ramp.

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

–Note that aguide gives the necessary signals to the machine driver.

–Drop the equipment in and drive it onto the loading ramp. Keep the equipment tight over the loading surface and drive it carefully onto the ramp and further into the transporting vehicle.

–The superstructure must be secured with the undercarriage by using locking bolts (only for A-equipment), after loading the machine onto the low loader.

–Secure the machine and the remaining equipment parts with chains and chocks against shifting according to national regulations for loading and transporting.

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

–Close all cab and panel doors.

–Verify that no one is located 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.

3.7.2Transporting the machine on a low loader

3.7.2.1Preparatory activities

Before driving on to the low loader, the following arrangements must be made:

The ramp gradient must be flatter than the machine’s given hill climbing ability. Ramp gradient angle W <= 30º. Have the chocks ready.

Lay down and secure wooden planks carefully on the steel surface of the ramp. Clean any ice, snow or mud off the tyres before starting to drive up the ramp.

3.7.2.2Loading the machine on to the low loader

To drive the machine up on to the low loader:

The machine must be driven up on to the low loader with the rigid axle 1 leading. For this, the superstructure must be rotated 180°.

If the superstructure is rotated 180° to the chassis, the driving and steering directions are reversed.

Drive and steer with increased caution.

Align the machine precisely to the loading ramp. Drive the machine on to the low loader.

Note

Have a signaller provide the necessary signs.

Rotate the superstructure carefully 180º (direction of travel over floating axle) and lower the equipment (see Fig. 3-93).