Previous Page  14 / 28 Next Page
Information
Show Menu
Previous Page 14 / 28 Next Page
Page Background

14

R 920 Litronic

Technical Data

Engine

Rating per ISO 9249

�������������

105 kW (143 HP) at 1,800 RPM

Model

������������������������������

Liebherr D 834 A7

Type

��������������������������������

4 cylinder in-line

Bore/Stroke

�����������������

108/125 mm

Displacement

���������������

4.58 l

Engine operation

�����������������

4-stroke diesel

Common-Rail injection system

exhaust-gas recirculation (eagr)

Exhaust gas treatment

����������

oxidation catalyst

emission standard stage IIIB

Option

������������������������

Liebherr particle filter

Cooling

�����������������������������

water-cooled and integrated motor oil cooler,

after-cooled and fuel cooled

Air cleaner

�������������������������

dry-type air cleaner with pre-cleaner, primary and

safety elements

Fuel tank

���������������������������

341 l

Electrical system

Voltage

�����������������������

24 V

Batteries

���������������������

2 x 135 Ah/12 V

Starter

������������������������

24 V/5 kW

Alternator

���������������������

three phase current 28 V/110 A

Engine idling

�����������������

sensor-controlled

Motor management

��������������

connection to the integrated excavator system

controlling via CAN-BUS to the economical

utilisation of the service that is available

Hydraulic System

Hydraulic system

�����������������

Positive Control. Dual circuit hydraulic system for

independent and need-based quantity allotment

via the hydraulic pumps; sensor-guided. Features

high system dynamics and sensibility provided by

integrated system controlling

Hydraulic pump

������������������

Liebherr variable displacement pump built in

transversal plate style, in parallel arrangement

with integrated transfer box

Max. flow

���������������������

2 x 173 l/min.

Max. pressure

���������������

350 bar

Pump management

��������������

electronic pump management via the integrated

system controlling (CAN-BUS) synchronous to

the control block

Hydraulic tank

��������������������

207 l

Hydraulic system

�����������������

max. 360 l

Hydraulic oil filter

�����������������

1 full flow filter (10 μm)

Hydraulic oil cooler

��������������

compact cooler, consisting of a water cooler,

sandwiched with hydraulic oil cooler, fuel cooler

and after-cooler cores and hydrostatically driven

fan

MODE selection

������������������

adjustment of engine and hydraulic performance

via a mode pre-selector to match application, e.g.

for especially economical and environmentally

friendly operation or for maximum digging per­

formance and heavy-duty jobs

RPM adjustment

�����������������

stepless adjustment of engine output via RPM at

each selected mode

Tool Control

�����������������������

10 preadjustable pump flows and pressures for

add-on tools

Hydraulic Controls

The controlling is conducted via the integrated excavator system technology,

input and output modules, communicated via the CAN-BUS with the electronic

central unit.

Power distribution

���������������

via control valve with integrated safety valves

Servo circuit

Attachment and swing

����

proportional via joystick levers

Travel

�������������������������

– with proportionally functioning foot pedals

and adjusted with a plugable lever

– speed pre-selection

Additional functions

�������������

proportional regulation via slide switches or

foot pedals

Swing Drive

Drive by

����������������������������

Liebherr swash plate motor, shockless and

antireaction

Transmission

����������������������

Liebherr compact planetary reduction gear

Swing ring

�������������������������

Liebherr, sealed single race ball bearing swing

ring, internal teeth

Swing speed

����������������������

0 – 12.9 RPM stepless

Swing torque

���������������������

51 kNm

Holding brake

��������������������

wet multi-disc (spring applied, pressure released)

Operator’s Cab

Cab

���������������������������������

ROPS safety cab structure with individual wind-

screens or featuring a slide-in subpart under the

ceiling, work headlights integrated in the ceiling,

a door with a side window (can be opened on

both sides), large stowing and depositing possi­

bilities, shock-absorbing suspension, sound­

damping insulating, tinted laminated safety glass,

separate window shades for the sunroof window

and windscreen, 12 V plug, storage bins, lunch-

box, cup holder

Operator’s seat

�������������������

Comfort seat, airsprung with automatic weight

adjustment, vertical and horizontal seat damping

including consoles and joysticks. Seat and arm-

rests adjustable separately and in combination,

seat heating as standard

Control system

�������������������

arm consoles, swinging with the seat

Operation and displays

���������

large high resolution colour display with selfexpla­

natory operation via touch screen, video, versatile

adjusting, control and monitoring facilities, e.g.

climate control, implement and tool parameters

Air-conditioning

������������������

standard automatic air-conditioning, ambient air

function, fast de-icing and demisting at the press

of a button, air vents can be operated via a menu;

ambient air and fresh air filters can be easily

replaced and are accessible from the outside;

heating-cooling unit, designed for extreme out-

side temperatures, sensors for solar radiation,

inside and outside temperatures

Noise emission

ISO 6396

���������������������������

L

pA

(inside cab)

=  68 dB(A)

2000/14/EC

������������������������

L

WA

(surround noise) = 101 dB(A)

Undercarriage

Versions

NLC

���������������������������

gauge 2,000 mm

LC

�����������������������������

standard gauge 2,250 mm

Drive

��������������������������������

Liebherr swash plate motors with integrated

brake valves on both sides

Transmission

���������������������

Liebherr planetary reduction gears

Travel speed

����������������������

low range – 3.1 km/h

high range – 5.9 km/h

Net drawbar pull on crawler

����

171 kN

Track components

���������������

B 60, maintenance-free

Track rollers/Carrier rollers

�����

8/2

Tracks

������������������������������

sealed and greased

Track pads

������������������������

triple-grouser

Digging locks

���������������������

wet multi-discs (spring applied, pressure

released)

Brake valves

����������������������

integrated into travel motors

Lashing eyes

���������������������

integrated

Attachment

Type

��������������������������������

combination of resistant steel plates and cast

steels components

Hydraulic cylinders

��������������

Liebherr cylinders with special seal-system,

shock protection

Pivots

������������������������������

sealed, low maintenance

Lubrication

������������������������

automatic central lubrication system (except link

and tilt geometry)

Hydraulic connections

����������

pipes and hoses equipped with SAE splitflange

connections

Bucket

�����������������������������

fitted as standard with Liebherr tooth system