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4

R 920 Compact Litronic

Technical Data

Swing Drive

Drive

Liebherr swashplate motor with torque control and

integrated brake valve

Transmission

Liebherr compact planetary reduction gear

Swing ring

Liebherr, sealed race ball bearing swing ring,

internal teeth

Swing speed

0 – 10.0 RPM stepless

Swing torque

50 kNm

Holding brake

wet multi-disc (spring applied, pressure released)

Hydraulic System

Hydraulic pump

Liebherr, variable displacement, swashplate pump

Max. flow

300 l/min.

Max. pressure

350 bar

Hydraulic pump

regulation and control

Liebherr-Synchron-Comfort-system (LSC) with

electronic engine speed sensing regulation, pressure

and flow compensation, torque controlled swing drive

priority

Hydraulic tank

130 l

Hydraulic system

max. 300 l

Hydraulic oil filter

1 main return filter with integrated partial micro

filtration (5 µm)

Cooling system

compact cooling system comprising cooling unit for

water, hydraulic oil and charge air with stepless,

thermostatically controlled 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 performance and

heavy-duty jobs

Engine speed and

performance setting

stepless alignment of engine output and hydraulic

power via engine speed

Engine

Rating per ISO 9249

100 kW (136 HP) at 1,800 RPM

Model

Liebherr D924 A7-04

Type

4 cylinder in-line

Bore / Stroke

104 / 132 mm

Displacement

4.5 l

Engine operation

4-stroke diesel

Common-Rail

turbo-charged and after-cooler

reduced emissions

Exhaust gas treatment

SCR with urea injection

emission standard stage IV/ Tier 4f

Option

particle filter

Cooling system

water-cooled and integrated motor oil cooler

Air cleaner

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

safety elements

Fuel tank

250 l

Urea tank

46 l

Electrical system

Voltage

24 V

Batteries

2 x 135 Ah / 12 V

Alternator

three-phase current 28 V/ 80 A

Engine idling

sensor controlled

Hydraulic Controls

Power distribution

via control valves with integrated safety valves,

simultaneous and independent actuation of chassis,

swing drive and attachment

Servo circuit

Attachment and swing

proportional via joystick levers

Chassis

– with proportionally functioning foot pedals and

adjusted with a plugable lever

– speed pre-selection

Additional functions

proportional regulation via foot pedals or rocker