Liebherr HS 8070 HD Litronic - Manual (Page 5)

HS 8070 HD 5
Technical description
Hydraulic system
The main pumps are operated by a distributor gearbox. Axial piston
displacement pumps work in closed and open circuits supplying
oil only when needed (flow control on demand). To minimize peak
pressure an automatically working pressure cut-off is integrated.
This spares pumps and saves energy. The hydraulic oil is cleaned
through electronically controlled pressure and return filters. Possible
contamination is signaled in the cabin.
Ready made hydraulic retrofit kits are available to customize
requirements e.g. powering casing oscillators, VM–vibrators, hydraulic
grabs, fixed leaders etc.
Working pressure
max. 400 bar
Oil tank capacity 880 l
Boom winch
Line pull max. 2x 50 kN
Rope diameter 18 mm
Boom up 45 sec. from 15° to 82°
Swing
Consists of rollerbearing with external teeth for lower tooth flank
pressure, fixed axial piston hydraulic motor, spring loaded and
hydraulically released multi–disc holding brake, planetary gearbox and
pinion.
Swing speed from 0–4.5 rpm continuously variable, selector for 3
speed ranges to increase swing precision.
Option:
Second swing drive
Crawlers
The track width of the undercarriage is changed hydraulically.
Propulsion through axial piston motor, hydraulically released spring
loaded multi–disc brake, maintenance-free crawler tracks, hydraulic
chain tensioning device.
3-web grousers
700 mm
Transport width 3000 mm
Drive speed 0 – 1.5 km/h
Option:
3-web grousers
800 mm
Transport width 3390 mm
Option:
• 2-speed hydraulic motor for higher travel speed
Noise emission
Noise emissions correspond with 2000/14/EC directive on noise
emission by equipment used outdoors.
Main winches
Winch options:
Line pull (nom. load)
120 kN 160 kN 200 kN
Rope diameter 24 mm 26 mm 30 mm
Drum diameter 525 mm 580 mm 630 mm
Rope speed 0–133 m/min 0-111 m/min 0-90 m/min
Rope capacity 1st layer 43.5 m 51.9 m 40 m
The winches are outstanding in their compact design and easy
assembly. Clutch and braking functions on the free-fall system are
provided by a compact designed, low wear and maintenance-free
multi–disc brake.
The drag and hoist winches use pressure controlled, variable flow
hydraulic motors. This system features sensors that automatically
adjust oil flow to provide max. winch speed depending on load.
Option:
• Auxiliary winch
70 kN in boom foot (1311.22)
• Tagline winch 30 kN with free fall
Engine
Power rating according to ISO 9249, 390 kW (523 hp) at 1900 rpm
Engine type
Liebherr D 856 A7 SCR
Fuel tank 680 l capacity with continuous level
indicator and reserve warning
Engine complies with NRMM exhaust certification EPA / CARB Tier 4i
or 97/68 EC Stage III B.
ECO-Silent-Mode:
For work not requiring high engine power, the diesel engine can be
operated in the ECO-Silent-Mode (e.g. for inserting reinforcement
cages, for dragline or lift crane operation).
Due to the ECO-Silent-Mode which can be preselected by the operator
the engine runs with optimum fuel efficiency. This lowers consumption
and reduces noise emission.
Control
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
to withstand extreme temperature changes and the rough heavy
duty tasks common in the construction industry. Complete machine
operating data, warnings and failure indications are clearly displayed in
the required language on the high resolution monitor in the operator’s
cab.
Documentation of operating data (PDE) 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.
Options:
• PDE: Process data recording
• GSM/GPRS telematics module
• Special demolition control system