Liebherr HS 825 HD Litronic - Manual (Page 17)

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Dragline operation
The electro-hydraulic continuous proportional control of Liebherr hydraulic crawl-
er cranes enables precise and simultaneous crane movements, which are indis-
pensable for dragline applications. In addition, a second or third swing drive – if
required – increases swing torque resulting in short swing cycles and fast loading
cycles. The “Interlock” control system, which has been specially developed for
dragline applications, allows power lowering of the grab line when raising the
dragline bucket with the hoist rope, which saves energy and prolongs service life
of the hoist rope. The hydrostatic winch drive adapts the rope speed to the soil
conditions and always provides optimum fi lling of the dragline bucket.
Machines offering production levels of 80 - 400 m³ per hour and digging
depths of 6 - 24 m are available.
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