3.4Working with the machine

3.4.1The travel movements Straight travel

1 Idler wheel

2 Sprocket wheel

Caution!

Travel

5 Left travel pedal

6 Right travel pedal

When travelling the machine, the upper carriage must be rotated to the undercarriage in such a way that ,during forwards travel, the idler wheel 1 is in front and the sprocket wheel 2 is at the rear.

Travelling forwards: Push the both travel pedals forwards (5a + 6a).

Travelling backwards: Push the both travel pedals down (5b + 6b).

Caution!

Before you travel in reverse, make sure the area behind the machine is free of any obstacle and nobody is in your way.

Turning over one track

Turning right: Push the left travel pedal 5 forwards (5a).

Turning left: Push the right travel pedal 6 forwards (6a).

Note!

Avoid turning over one track in reverse, this exposes the track drive components to increased strain.

Counter rotation

Turning right: Push the left travel pedal 5 forwards (5a), ... ... and at the same time push the right travel pedal 6 down (6b).

Turning left: Push the right travel pedal 6 forwards (6a), ... ... and at the same time push the left travel pedal 5 down (5b).

Danger!

Pay attention that, if the uppercarriage is turned by 180° to the undercarriage, all the travel lovements are inverted (left and right, forwards and backwards)!

Levers for manual control of travel movements

These levers allow a more sensitive control of the travel movements, they are installed to the travel pedals at machine delivery. If not used, they can be removed and stored inside the cab. Each time when a particularly sensitive control is required, insert the levers into the travel pedals and operate the travel movements manually.

Travel speed preselection

The travel motors can be operated in two different positions:

– travel in normal speed (position 1): The obtained track forces are maximum while the travel speed is moderate.

– travel in increased speed (position 2): The track forces are reduced and the travel speed is maximum.

The preselection between the both positions is realized via the touch S21 Depressing the touch causes the integrated LED 1 to light up and go off alternately. When the LED 1 in the touch S21 is off.

–The travel motors remain all the time in position 1 (normal speed). When the LED 1 in the touch S21 is lighting.

–During travel, the oil motors mounted to the travel gears now change automatically from normal speed to increased speed each time the terrain conditions allow it.

–After changeover to position 2 (increased speed) the LED 2 illuminates.

–Inversely, when ground conditions become difficult again, the travel motors automatically return to position 1 (normal speed). The LED 2 turns off.

The travel brakes

The travel drive of your machine is fitted with two different braking systems. In the both systems, the releasing and the applying of the brakes occurs automatically when depressing and returning to neutral the travel pedals.

The hydraulic operating brakes

When the travel pedals are released, they automatically return to neutral position. This causes the hydraulic brakes valves 6 mounted to the travel motors to react and a rapid braking of the machine is achieved.

Caution!

Disengaging the travel pedals quickly causes the machine to halt abruptly. When ever possible, return the pedals to neutral progressively, in particular on machines which are equipped with very long working attachments or when they hold up a heavy load.

When these machines come to standstill too brutally, important forces of inertia are generated, which can endanger the stability of the machine.

The hydraulic brake valves also avoid overspeeding and run away of the machine when travelling down a slope.

Fig. 3-67 Arrangement of mechanical brakes 5 and hydraulic brake valves 6

The mechanical stop and parking brake

A negatively acting, hydraulic operated multi-disc brake 5 is integrated in each travel gear.

When a travel pedal is actuated, hydraulic pressure builds up in the corresponding travel circuit and releases the brake. Inversely, when the travel pedal is returned to neutral position the pressure is annuled and the brake applies again.

Limit of gradeability

Danger!

Risk of tipping over!

The machine has a maximum gradeability of 35°. This limit is valid for a machine travelling straight up or down the slope, with the uppercarriage aligned with the undercarriage and under appropriate adherence and stability conditions.

This limit is only valid for translation and not working on a slope. This limit is only valid for a standard machine with standard attachment and takes into account the hydraulic and mechanical power losses.

Note!

To know the maximal slope the machine can work in, contact the customer service because this value depends on the configuration of the machine. The stability values given in the technical datas of the machine (chapter 1.2 of this manual) are valuable only for an horizontal and firm level ground.

Travelling up

Position the attachment as shown on the picture.

•The angle between boom and stick must be between 90° and 110°.

•The tooth ot the bucket must be oriented down at 20-30 cm of the ground.

Travelling down

Position the attachment as shown on the picture.

•The angle between boom and stick must be between 90° and 110°.

•The tooth ot the bucket must be oriented up with the bottom of the bucket at 2030 cm of the ground.

Press the touch S21 the three LEDs in the touch go out, the normal travel speed is forced.

3.4.2Travel warning device (option)

Push the drive pedal 5 or 6. The travel warning device switches on automatically. An acoustic signal (warning tone) is produced.

Deactivation of the drive warning device:

Caution!

If a magnetic system LIEBHERR AMERICA (LAM) is mounted, the drive warning device is controlled by the button S5R on left-hand joystick 4 instead of the button S6R Note!

Press the button S6R on right-hand joystick 3 The drive warning device is deactivated.

The drive warning device can only be deactivated 10 seconds after starting to drive. If the drive pedal is engaged once more, the drive warning device will reactivate.

3.4.3The uppercarriage swing movements

The swing movements of the uppercarriage are controlled by the left joystick 4.

Swing Movements

Caution!

The joystick 4 functions described below refer to the normal control, fitting out the machine at delivery.and according to ISO-standards, On machines equiped in addition with a special control system, and if this special control system is activated by the operator, the joystick functions correspond to the information on the label which is sticked on the side window of the cab and is specific to the installed special control system.

Push the left joystick 4 to the left c: the uppercarriage rotates to the left.

Push the joystick to the right d: the uppercarriage rotates to the right.

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