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Technical data, Undercarriage, Attachment – Liebherr A 944 C HD Litronic High Rise Material Handler User Manual

Page 2: Engine, Hydraulic system, Hydraulic controls, Swing drive, Operator’s cab

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A 944 C HD Litronic High Rise

Technical Data

Undercarriage

Drive

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axial piston motor with brake valves

Travel speed

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0 – 10.0 km/h

Axles

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90 t excavator axles; oscillating steering

axle with hydraulic lock (in any position)

Brakes

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wet, maintenance-free multi disc brakes,

hydraulically actuated travel and parking

brake

Stabilization

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4-point outriggers with suspended rocker

arm supports

Attachment

Type

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high-strength steel plates at highly-

stressed points for the toughest require-

ments. Complex and stable mountings of

attachment and cylinders. Unrivalled

strength, even at high loads

Hydraulic cylinders

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Liebherr cylinders with special seal system.

Shock absorption

Pivots

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sealed, low maintenance

Lubrication

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Liebherr semi-automatic central lubrication

system

Engine

Rating per ISO 9249

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190 kW (258 HP) at 1,800 RPM

Model

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Liebherr D 936 L according to level IIIA / Tier 3

Type

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6 cylinder in-line

Bore/Stroke

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122/150 mm

Displacement

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10,5 l

Engine operation

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4-stroke diesel

unit pump system

turbo-charged and after-cooled

reduced emissions

Cooling

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water-cooled and integrated motor oil

cooler

Air cleaner

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dry-type air cleaner with pre-cleaner,

primary and safety elements, automatic

dust discharge

Fuel tank

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660 l

Standard

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sensor controlled engine idling

Electrical system

Voltage

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24 V

Batteries

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2 x 170 Ah/12 V

Starter

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24 V/6.6 kW

Alternator

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three phase current 28 V/80 A

Option

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Liebherr particle filter

Hydraulic System

Hydraulic pump

for attachment and

travel drive

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two Liebherr variable flow, swash plate

pumps

Max. flow

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2 x 303 l/min.

Max. pressure

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350 bar

Pump regulation

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electro-hydraulic with electronic engine

speed sensing regulation, pressure com-

pensation, flow compensation, automatic

oil flow optimizer

Hydraulic pump

for swing drive

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reversible, variable flow, swash plate pump,

closed-loop circuit

Max. flow

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205 l/min.

Max. pressure

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380 bar

Hydraulic tank

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460 l

Hydraulic system

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740 l

Hydraulic oil filter

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2 full flow filters in return line with inte-

grated fine filter area (5 µm)

Hydraulic oil cooler

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compact cooler, consisting of a water

cooler, sandwiched with hydraulic oil

cooler, fuel cooler and after-cooler cores

and hydrostatically driven fan

MODE selection

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adjustment of machine performance and

the hydraulics via a mode selector to match

application

ECO

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for especially economical and environ-

mentally friendly operation

POWER

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for maximum digging power and heavy

duty jobs

LIFT

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for lifting

FINE

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for precision work and lifting through very

sensi tive movements

RPM adjustment

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stepless adjustment of engine output via

the rpm at each selected mode

Tool Control (Option)

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ten preadjustable pump flows and pres-

sures for add on tools

Hydraulic Controls

Power distribution

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via control valves in single block with inte-

grated safety valves

Flow summation

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to boom and stick

Closed-loop circuit

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for uppercarriage swing drive

Servo circuit

Attachment and

swing

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proportional via joystick levers

Travel

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proportional via foot pedal

Additional functions

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via foot pedals or joystick push buttons

Swing Drive

Drive by

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Liebherr swash plate motor with integrated

brake valves

Transmission

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Liebherr compact planetary reduction gear

Swing ring

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Liebherr, sealed single race ball bearing

swing ring, internal teeth

Swing speed

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0 – 4.5 RPM stepless

Swing torque

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125 kNm

Holding brake

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wet multi-disc (spring applied, pressure

released), pedal controlled positioning

brake

Operator’s Cab

Cab

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resiliently mounted, sound insulated, tinted

windows, front window stores overhead,

door with sliding window

Operator’s seat

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fully adjustable, shockabsorbing suspen-

sion, adjustable to operator’s weight and

size, 6-way adjustable Liebherr seat

Joysticks

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integrated into adjustable consoles

Monitoring

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menu driven query of current operating

conditions via the LCD display. Automatic

monitoring, display, warning (acoustical

and optical signal) and saving machine

data, for example, engine overheating, low

engine oil pressure or low hydraulic oil level

Air conditioning

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standard air conditioning, combined

cooler/heater, additional dust filter in fresh

air/recircu lated

Noise emission

ISO 6396

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L

pA

(inside cab)

= 75 dB(A)

2000/14/EC

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L

WA

(surround noise) = 105 dB(A)