Liebherr HS 855 HD Litronic - Manual (Page 5)

Engine
Power rating according to ISO 9249, 450 kW (603 hp) at 1900 rpm
Engine type Liebherr D 9508 A7
Fuel tank 211 gal capacity with continuous level indicator
and reserve warning
Engine complies with NRMM exhaust certification EPA / CARB Tier 3 and
97/68 EC Stage III
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 signalled in the cabin. The use of synthetic
environmentally friendly oils is possible.
Ready made hydraulic retrofit kits are available to customize requirements e.
g. powering casing oscillators, VM vibrators, hydraulic grabs, hanging leads
etc.
Working pressure max. 5076 psi
Oil tank capacity 216 gal
Main winches
Winch options:
Line pull (nom. load) 35,300 lbs 44,100 lbs 55,200 lbs
Rope diameter 26 mm 30 mm 34 mm
Drum diameter 22,8” 24,8” 29,5”
Rope speed ft/min 0–443 0–302 0–236
Rope capacity 1st layer 170 ft 152 ft 158 ft
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 15,500 lbs in boom foot
Tagline winch 6,600 lbs with free fall
Boom winch
Line pull max. 23,200 lbs
Rope diameter 20 mm
Boom up 44 sec. from 15º to 86º
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 – 4.9 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.
Flat or triple grouser track shoes 31.5 inch
Drive speed 0 – 0.8 mph
Option:
F 2 speed hydraulic motor for higher travel speed
F Self assembly system, jack up system
Control
The control system – developed and manufactured by Liebherr – is designed
to withstand extreme temperature changes and the rough heavy duty tasks
common in the construction industry. Complete machine operating data are
shown on a high resolution display. The crane is equipped with proportional
control for all movements, which can be carried out simultaneously.
Dragline operation: A special ”Interlock” control system is an option available.
It is designed for power lifting of the dragline bucket without using the drag
winch brake.
An additional option is the ”Redundant Control System”, which allows
restricted operation of the machine in the event of a failure on the electronic
base control or its sensors.
On request, Liebherr also offers special custom designed control systems for
free fall winches.
Operation: Left joy stick for boom winch and swing, right two directional levers
for winch I and II. Crawler control is actuated with the two central foot pedals.
Additionally, hand levers can be attached to the pedals.
Options:
F Special demolition control system
F MDE: Machine data recording
F PDE: Process data recording
F GSM modem
Noise emission
Noise emissions correspond with 2000/14/EC directive on noise emission by
equipment used outdoors.
Technical description
HS 855 HD 5