Liebherr HS825HD User Manual

Liebherr hydraulic

crawler cranes

Defining
new standards

Flexibility, rentability and excellent performance are the
distinguishing features of the hydraulic crawler cranes (HS
series). On the international building machinery market
Liebherr-Werk Nenzing GmbH, Austria, is the leading pro­ducer of modern hydraulic crawler cranes, lift cranes and
carrier machines for special deep foundation applications.

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Performance through
leading technology

The hydraulic crawler cranes achieve excellent per­formance due to leading technology developed in-

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performance winches with integrated brakes, the electronic
control as well as the machine and process data recording
system defi ne new standards.

house. State-of-the-art Liebherr diesel engines, high

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Flexibility in all respects

With their modular concept Liebherr hy­draulic crawler cranes fulfi l all requirements,
especially in the fi elds of special and deep
foundation, extraction, material handling
as well as demolition and recycling.

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Economy in all respects

Effi cient transport, easy assembly and
high productivity combined with low op­erational costs are convincing features
of Liebherr hydraulic crawler cranes.

First-class comfort for
higher productivity

Even the standard equipment in­cludes numerous innovative tech-

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eration. The ergonomic cabin design provides the
operator with an unobstructed view of the entire
working area.

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Liebherr guarantees continuous availability of its hy­draulic crawler cranes throughout the world.

nical features ensuring ease of op-

Effective service

Thanks to low maintenance require­ments, the possibility of remote di­agnosis, quick assistance on site
and an effi cient spare parts supply,

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Performance through
leading technology

High fl exibility and excellent performance determine the application possibilities of Liebherr hydraulic crawler cranes.
Whether used with dragline bucket, slurry wall grab or casing oscillator – the large dimensioned Liebherr diesel en­gines always guarantee maximum performance. Equipment such as vibrators or casing oscillators can be operated
without additional power pack. Moreover, the powerful and maintenance-free free-fall winches are designed to fulfi l

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highest demands and afford effi cient and safe operation.

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Unique selling points:

• State-of-the-art electronic control system

• Powerful Liebherr diesel engines

• Large dimensioned and maintenance-free free-fall winches

• Strong crawler and swing drive components

• Extremely robust steel structure

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Control system

The core of the Liebherr hydraulic crawler cranes is the Litronic control
system. Developed and manufactured by Liebherr, this comprehensive
system encompasses all control and monitoring functions and is de­signed for extreme environmental conditions in tough assignments.

All information, warnings and failure indications required for the cur­rent machine operation are clearly displayed on the monitor in the
operator‘s cab and stored. Documentation of operating data enables
optimum diagnosis as well as early detection and prevention of more
serious defects.

An electro-hydraulic proportional control allows several movements to
be performed simultaneously. This ensures that all categories of loads
can be positioned with utmost precision.

Automated control systems, e.g. for dynamic soil compaction or an
“Interlock” control system for dragline application are available as an
option.

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Drives

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Liebherr hydraulic crawler cranes are equipped
with powerful Liebherr diesel engines. Specially de­signed for dynamic applications in heavy-duty con­struction tasks, they are extremely reliable, durable
and easy to service. The electronic control monitors
and checks all machine data. Since engine elec­tronics and crane control are optimally matched,
the diesel engine can be directly inter-linked with
the regulation of the hydraulic system, thus afford­ing even more ease of operation. Possible failures
are detected and localized immediately by the diag­nostics system. All movements can be carried out
simultaneously. Depending on the machine class,
diesel engines ranging from 180 kW to 670 kW
power are available.

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Winches

The maintenance-free Liebherr free-fall winches are installed as complete
units. The new concept with integrated drive and multi-disc brakes allows
increased drum width with the same outside dimensions, thereby increasing
rope capacity on the fi rst layer. This produces a longer rope life and reduced
operational costs. The integrated free-fall brakes prove their worth espe-

cially in diffi cult free-fall operations with heavy loads. The main winches are

driven via an axial piston displacement pump and a variable fl ow oil motor

in closed circuit. This design allows precise work cycles for all winch

movements. The supplied energy is ideally used in acceleration and

braking of the winches and regained when operating in the power

lowering mode.

Through automatic speed adjustment according to line pull

the high pressure controlled, variable fl ow hydraulic motors

allow full utilization of engine power even when working

with intermediate load.

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For example, an “Interlock” control system for dragline operations allows
power lowering of the grab line when raising the dragline bucket with the
hoist rope which signifi cantly reduces fuel consumption. The tagline winch
is used as a constant tension or free-fall winch and enables effi cient work
with grab or demolition ball.

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Steel construction

The hydraulic crawler cranes’ uppercarriage with its robust and torsion-re­sistant box design is mounted on a large undercarriage featuring wide track
and long crawlers. This results in good ground pressure characteristics and
stability.

The external, large dimension teeth of the Liebherr swing drive guar­antee optimum absorption of the high torque combined with mini­mum wear. Roller bearings in the swing drive ensure a superior,
low-fi t connection between upper and undercarriage. For
special applications, e.g. rotary drilling or dragline applica­tion, an additional increase in torque is achieved through
the installation of a second and/or third swing drive.

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