Liebherr HS 885 HD Litronic - Manual (Page 13)

HS 885 HD 13
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. 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 238 gal
Boom winch
Line pull max. 2 x 15,500 lbs
Rope diameter 20 mm
Boom up 84 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 – 3.6 rpm continuously variable, selector for 3 speed ranges
to increase swing precision.
Standard:
Second swing drive
Main winches
Winch options:
Line pull (nom. load)
47,400 lbs 55,200 lbs 66,200 lbs
Rope diameter 30 m 34 m 36 m
Drum diameter 24.8´´ 29.5´´ 32.3´´
Rope speed (ft/min) 0–279 0–226 0–180
With change gear bos (ft/min) 0–403 0–390
Rope capacity 1st layer 153 ft 151 ft 151 ft
The winches are outstanding in their compact design and easy assembly.
Propulsion is via a planetary gearbox in an oil bath. Load support by the
hydraulic system; additional safety factor provided by a spring loaded,
multi–disc holding brake. The main 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:
Crane winch (main winch)
35,300 lbs with multi–disc holding brake
Auxiliary winch 15,500 lbs in boom foot
Tagline winch 15,500 lbs with free fall
15,500 lbs with free fall
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 double grouser track shoes
Drive speed 0 – 0.8 mph
Option:
• 2 speed hydraulic motor for higher travel speed
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:
• Special demolition control system
• MDE: Machine data recording
• PDE: Process data recording
• GSM modem.
Noise emission
Noise emissions correspond with 2000/14/EC directive on noise emission
by equipment used outdoors.
Engine
Power rating according to ISO 9249, 450 kW (603 hp) at 1900 rpm
Engine type
Liebherr D 9508 A7
Fuel tank 920 l capacity with continuous level
indicator and reserve warning
Engine complies with NRMM exhaust certification EPA / CARB Tier
3 and 97/68 EC Stage III
Option:
Power rating according to ISO 3046, 670 kW (898 hp) at 1900 rpm
Engine type
MAN D 2842 LE
Fuel tank 920 l capacity with continuous level
indicator and reserve warning
Engine complies with NRMM exhaust certification EPA / CARB Tier 2.
HS885_englisch_usa.indd 13 10.03.2008 08:55:49