Technical description
Engine Main winches
Power rating according to ISO 9249, 180 kW (241 hp) at 2000 rpm Engine type Winch options: Line pull (nom. load) Liebherr D 934 L A6 Fuel tank 80 kN 120 kN 160 kN Rope diameter 790 l capacity with continuous level 20 mm 24 mm 26 mm Drum diameter indicator and reserve warningEngine complies with NRMM exhaust certification EPA/CARB Tier 3 and 97/68 EC Stage IIIOption: Power rating according to ISO 9249, 270 kW (362 hp) at 2000 rpm Engine type 420 mm 525 mm 580 mm Rope speed 0–160 m/min 0-130 m/min 0-130 m/min Rope capacity 1st layer 40 m 48.5 m 51.9 mThe 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: Tagline winch Liebherr D 936 L A6 Fuel tank 790 l capacity with continuous level indicator and reserve warningEngine complies with NRMM exhaust certification EPA/CARB Tier 3 and 97/68 EC Stage III 20 kN with free fall
Hydraulic system
A double axial displacement pump with integrated gearbox supplies the open loop hydraulic system, allowing all functions to be operated simultaneously. To minimize peak pressure an automatic working pressure cut–off is integrated in the pump. All filters are electronically monitored. The use of synthetic environmentally friendly (biodegradable) 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
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 max. 350 bar Oil tank capacity 650 l 700 mm Drive speed 0 – 1.85 km/h Option: • 2 speed hydraulic motor for higher travel speed
Boom winch
Line pull max. 2x 50 kN Rope diameter 18 mm Boom up 55 sec. from 15° to 82°
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. 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
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.
Noise emission
Noise emissions correspond with 2000/14/EC directive on noise emission by equipment used outdoors.
HS 825 HD 5
