Technical data, Engine, Hydraulic system – Liebherr A 900 C Litronic User Manual

Page 12: Hydraulic controls, Swing drive, Operator’s cab, Undercarriage, Attachment

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12

A 900 C Litronic

Technical Data

Engine

Rating per ISO 9249

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95 kW (129 HP) at 1,800 RPM

Model

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Liebherr D 934 S according to level IIIA / Tier 3

Type

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4 cylinder in-line

Bore/Stroke

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122/136 mm

Displacement

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6.4 l

Engine operation

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4-stroke diesel

unit pump system

turbo-charged and after-cooled

reduced emissions

Cooling system

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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

Fuel tank

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290 l

Engine idling

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sensor controlled

Electrical system

Voltage

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24 V

Batteries

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2 x 110 Ah/12 V

Alternator

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three phase current 28 V/80 A

Hydraulic System

Hydraulic pump

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Liebherr, variable displacement, swash-

plate pump

Max. flow

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300 l/min.

Max. hydr. pressure

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350 bar

Hydraulic pump

regulation and control

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Liebherr-Synchron-Comfort-system (LSC)

with electronic horsepower regulation,

pressure cut-off, load sensing and torque

controlled swing drive priority

Hydraulic tank capacity

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175 l

Hydraulic system capacity

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max. 290 l

Filtration

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one main return filter with integrated partial

micro filtration (5 µm)

Cooling system

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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

Modes

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can also be adjusted by the operator to

adjust engine and hydraulic performance to

match job conditions (Note: All modes pro-

vide full max. power)

LIFT

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for precise lifting tasks

FINE

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for precision work at high speed i.e.

grading

ECO

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for most economic performance at best

environmental conditions

POWER

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for max. output

Super-Finish

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additional operator adjustable work speed

function for further increased feathering.

Applies to all modes and all control func-

tions

RPM adjustment

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stepless adjustment of engine output via

rpm

Hydraulic Controls

Power distribution

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via control valve with integrated safety

valves, simultaneous and independent

operation of travel drive, swing drive and

work

Control type

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 switch and/or proportional foot pedals

Option

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Liebherr-Proportional-Controls, propor-

tionally acting transmitters on the joysticks

for additional hydraulic functions

Swing Drive

Drive

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Liebherr swashplate motor with torque

control and integrated brake valve

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 – 9.0 RPM

Swing torque

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42 kNm

Holding brake

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wet discs (spring applied – pressure

released)

Option

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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, large roof win-

dow, sun visor

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 seat 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/

recirculated

Noise emission

ISO 6396

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L

pA

(inside cab)

= 72 dB(A)

2000/14/EC

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L

WA

(surround noise) = 99 dB(A)

Sound level in correspondence with “Blue Angel” guidelines.

Undercarriage

Drive

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variable flow swashplate motor with auto-

matic brake valve

Transmission

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oversized two speed power shift trans-

mission with additional creeper speed

Travel speed

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0 – 2.5 km/h (creeper speed off road)

0 – 5.0 km/h (off road)

0 – 9.0 km/h (creeper speed on road)

0 – 20.0 km/h (road travel)

0 – 30.0 km/h Speeder (Option)

Axles

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32 t excavator axles; automatic or operator

controlled front axle oscillation lock

Brakes

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steering and rigid axle with wet, mainte-

nance-free multi disc brakes with minimized

backlash. Spring applied/pressure released

parking brake integrated into gear box

Stabilization

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stabilizing blade (adjustable during travel

for dozing)

2-point outriggers

stabilizing blade, front + 2 pt. outriggers,

rear

4-point outriggers

Option

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EW (extra wide gauge) undercarriage

Attachment

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

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