Technical data, Engine, Hydraulic system – Liebherr A 900 C Litronic User Manual
Page 12: Hydraulic controls, Swing drive, Operator’s cab, Undercarriage, Attachment

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