Control, operation Working with the machine

Before carrying out any work, the machine must first be placed on level and firm ground.

If necessary, prepare the working area and remove obstacles.

If possible, all work with the machine should be carried out through the idler A.

3.4.4Operating the working attachment

Caution!

The machine is equipped with PCSA controls as standard. On request, the machine can be fitted with a different control system (e.g. LIEBHERR control). For such machines, observe the instructions in the respective separate operating manual.

The left joystick (1) controls the stick and swivelling movements: a and b: Stick is extended or retracted. c and d: Uppercarriage is swivelled to the left or right.

The right joystick (2) controls the boom and grapple movements: e and f: Grapple is closed or opened. g and h: Boom is lifted or lowered.

Moving the stick:

The stick is moved by operating the left joystick 1.

Push the joystick back a: Stick moves in direction a

Push the joystick forward b. Stick moves in direction b

Moving the boom:

The boom is moved by operating the right joystick 2

Push the joystick back g: Boom is lifted.

Push the joystick forward h: Boom is lowered.

Operating the grapple:

Danger

Risk of injury to persons standing in the danger zone. Do not allow auxiliary personnel hand-guide the grapple!

Move the joystick to the left e: Grapple is closed.

Move the joystick to the right f: Grapple is opened.

Combined movements:

Diagonal movement of a joystick results in a combination of the associated working movements. Operators can thus complete different attachment movements simultaneously.

Selecting operating mode of the attachment (optional equipment):

The attachment can be operated in two different modes. The machine operator can determine the operating characteristics of the hydraulics for the "Retract stick" function.

In "Stick passive" mode, the stick is retracted without pressure solely by gravity. This is done without any hydraulic power. As a result, there is a greater hydraulic reserve available for the other parts of the working attachment.

In "Stick active" mode, the stick is retracted with pressure (i.e. driven).

To switch between the two modes, actuate the switch S499

Before switching mode, stop all movements of the working attachment. Select the operating mode as required for the task at hand.

S499Operating mode

OFF

The light in the switch is off. Stick passive

The "Retract stick" movement is completed without hydraulic pressure.

The light in the switch is on. Stick active

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The "Retract stick" movement is completed with hydraulic pressure.

Note!

In passive mode, the stick can only be lowered to its lowest point, where it is in a nearly vertical position (see Fig. 3-66). To retract the stick further, you must select the "Stick active" mode.

3.4.5Swivelling the uppercarriage

The uppercarriage can only be swivelled, if the slewing gear brake is released (LED in switch S17 is off).

The uppercarriage is swivelled by operating the left joystick 1

Move the joystick to the left c: The uppercarriage is swivelled to the left.

Move the joystick to the right d: The uppercarriage is swivelled to the right.

3.4.6Halting the uppercarriage

The uppercarriage can be hydraulically slowed down in its movement and halted. The mechanical slewing gear brake enables the operator to secure the halted uppercarriage in any desired position.

Hydraulic braking:

Move the left joystick 1 to its neutral position: The uppercarriage is slowed down hydraulically.

Move the left joystick 1 in the opposite direction: The uppercarriage is stopped with the maximum hydraulic force.

Mechanical slewing gear brake:

The mechanical slewing gear brake can only be released, if the following conditions are met:

(see chapter "Entering and exiting machine").

Caution!

The mechanical slewing gear brake can be damaged, if it is applied during a swivelling movement.

Therefore apply the slewing gear brake only when the uppercarriage is stationary.

Press the switch S17: The slewing gear brake is applied. The LED in the switch is on.

Press the switch S17 again: The slewing gear brake is released and is operated in semi-automatic mode. The LED in the switch is off.

Mechanical slewing gear brake (semi-automatic):

Fig. 3-67 Semi-automatic slewing gear brake

In semi-automatic mode, the slewing gear brake is operated by means of the switch S57 at the right joystick.

Press the switch S57 down.

The slewing gear brake is applied automatically, if the uppercarriage is not rotating or if it has come to a standstill.

Press the switch S57 up. The slewing gear brake is released.

Note!

The LED in the switch S17 is always on when the brake is applied. If the slewing gear brake cannot be released with the switch S57, this might be due to any of the following causes: s for release are not met (access system, refuelling unit) automatic mode. In this case, it can only be released by actuating the switch S17 again.

Checking

the mechanical slewing gear brake:

The uppercarriage is stationary.

Press the switch S17. The slewing gear brake is applied. The LED in the switch is on.

Move the left joystick 1 to the right and then to the left stop. The uppercarriage must not swivel. The slewing gear brake is working properly.

Positioning slewing brake (special equipment):

The positioning slewing brake is used for the progressive and precise slowing down of the uppercarriage.

Note!

Frequent use of the positioning slewing brake results in increased wear. Do not use the positioning slewing brake as a working brake, but only for special halting and parking manoeuvres of the slewing gear. The uppercarriage should preferably be slowed down hydraulically.

Operate the pedal 1.

The uppercarriage is slowed down in its movement.

3.4.7Lowering the working attachment when diesel engine is shut off

When The Diesel Engine Is Off

In the event of an emergency, the working attachment can be lowered, even if the diesel engine is not running.

Turn the ignition key to contact position 1.

Operate the joysticks or pedals until the working attachment is lowered.

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Note

The working attachment can be lowered thanks to the pressure reserve in the control oil unit. This reserve is however limited and allows only for a limited number of operations of the pilot control units.

Therefore only use the joysticks to lower the working attachment and do not attempt to perform other movements.

3.4.8Mechanical stick cylinder shut-off

3.4.8.1Operating principle

When the boom is moved, it can reach great heights and outreaches. The stick with attached load might collide with the operator's cab or impact on other objects. There is even a risk of collision with the operator's cab or the object, which would likely result in injury to the operator, and damage to equipment or the attached load.

In order to assist the machine operator, the range of movement of the stick can be limited by the stick cylinder shut-off function.

If this option is activated, the stick can only be moved within the preset angle range. The reach of the attachment thus depends on the stick cylinder shut-off point and the angle of the boom.

The stick cylinder shut-off function has two shut-off points: MIN - stops the retracting movement of the stick MAX (optional equipment) - stops the extending movement of the stick

3.4.8.2Use of stick cylinder shut-off

The stick cylinder shut-off function remains permanently on and cannot be switched off during machine operation. If the stick is to be moved beyond a shut-off point, the stick cylinder shut-off function can be overridden.

Danger!

The stick cylinder shut-off is not a safety device in the narrow sense of the word and serves only as a utility for the machine operator!

Please note that the machine operator is responsible for the adjustment of the relevant settings!

Danger!

Despite the stick cylinder shut-off function, there remains a risk of damage to the operator's cab and objects in the vicinity of the machine. The machine might vibrate or swing! Risk of accident!

Possible causes: grapple swinging from its stick, or where the size of a working tool is considerably increased when it is opened. might be extended, depending on the oil temperature, attachment option, retraction speed and load.

Adjust the stick cylinder shut-off so that there is a sufficient safety distance, even if the working tool is oscillating or if the shut-off is delayed. Avoid fast movements of the stick when it is moved near the shut-off limits.

3.4.8.3Overriding stick cylinder shut-off function

Danger!

Risk of injury and damage to equipment! While the stick cylinder shut-off function is overridden, there is a risk that the attachment might collide with the operator's cab. When overriding the stick cylinder shut-off function, operate the machine with extreme caution.

If the industrial stick is to be moved beyond the shut-off point, the stick cylinder shutoff function can be overridden. The function can be bridged by means of the key switch S54 and the rocker switch button S55 at the left joystick.

Overriding inner shut-off point (MIN):

Turn the switch 54 to position 1

The bridging function is activated and can now by switched on.

Press and hold the rocker button S55.

The stick cylinder shut-off function is overridden.

Carefully move the stick beyond the shut-off point into the danger range. Release the rocker button S55 and turn the key switch S54 to position 0 The bridging function is deactivated.

Overriding outer shut-off point (MAX):

Turn the switch 54 to position 2

The bridging function is activated and can now by switched on.

Press and hold the rocker button S55. The stick cylinder shut-off function is overridden. Carefully move the stick beyond the shut-off point into the danger range. Release the rocker button S55 and turn the key switch S54 to position 0. The bridging function is deactivated.

3.4.8.4Adjusting the limit switches

This adjustment must be carried out by a trained specialist technician.

The limit switch is located at the fulcrum between the boom and the stick and cannot be accessed without special auxiliary tools. To work safely at this height, use suitable equipment (e.g. lifting platform).

The shut-off point must be adjusted in such a way that there is at all times a safety distance of 3m between the attachment and the objects to be protected (machine, operator's cab, other objects in the vicinity of the machine).

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