Liebherr Hydraulic excavator A 312 Litronic Operating manual 57081

Page 122

Control, operation

Operating manual

Working with the machine

Horizontal adjustment of the boom Press switch S356. The horizontal adjustment function is activated. The indicator light in the switch is on. Press the foot pedal k down. The boom is swivelled to the right. Press the foot pedal m down. The boom is swivelled to the left.

3.4.7

Lowering the working attachment when diesel engine is shut off

Fig. 3-77

Lowering attachment when the diesel engine is off

In the event of an emergency, the 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 attachment is fully lowered. Note The attachment is lowered with the residual pressure 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 attachment and do not attempt to complete other movements.

3.4.8

Swivelling uppercarriage Caution! All machines are equipped with the PCSA control as standard. On special 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 joystick functions described here apply only to the PCSA control. The uppercarriage is swivelled by means of the left joystick.

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3 - 76

MJFCIFSS

A 312 Litronic / 11140216


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