Liebherr R 944 C Litronic Material Handler - Manual (Page 2)

2 R 944 C Litronic Machine for Industrial Applications
Technical Data
Engine
Rating per ISO 9249 _____________ 190 kW (258 HP) at 1800 RPM
Model ______________________________ Liebherr D 936 L
Type ________________________________ 6 cylinder in-line
Bore/Stroke __________________ 122/150 mm
Displacement ________________ 10,5 l
Engine operation _________________ 4-stroke diesel
unit pump system
turbo-charged and after-cooled
reduced emissions
Cooling _____________________________ water-cooled and integrated motor oil cooler
Air cleaner _________________________ dry-type air cleaner with pre-cleaner, primary and
safety elements, automatic dust discharge
Fuel tank ___________________________ 660 l
Standard ___________________________ sensor controlled engine idling
Electrical system
Voltage _______________________ 24 V
Batteries ______________________ 2 x 170 Ah/12 V
Starter ________________________ 24 V/6,6 kW
Alternator _____________________ three phase current 28 V/80 A
Hydraulic System
Hydraulic pump
for attachment and
travel drive ___________________ two Liebherr variable flow, swash plate pumps
Max. flow _____________________ 2 x 303 l/min.
Max. pressure _______________ 350 bar
Pump regulation __________________ electro-hydraulic with electronic engine speed
sensing regulation, pressure compensation, flow
compensation, automatic oil flow optimizer
Hydraulic pump
for swing drive ______________ reversible, variable flow, swash plate pump,
closed-loop circuit
Max. flow _____________________ 205 l/min.
Max. pressure _______________ 400 bar
Hydraulic tank ____________________ 460 l
Hydraulic system _________________ 710 l
Hydraulic oil filter _________________ 2 full flow filters in return line with integrated fine
filter area (5 µm)
Hydraulic oil cooler _______________ cooler unit, consisting of radiator for engine
coolant with after-cooler core, for hydraulic fluid
with hydrostatically controlled fan drive
MODE selection __________________ adjustment of machine performance and the
hydraulics via a mode selector to match applica-
tion
ECO ___________________________ for especially economical and environmentally
friendly operation
POWER _______________________ for maximum digging power and heavy duty jobs
LIFT ___________________________ for lifting
FINE __________________________ for precision work and lifting through very sensi-
tive movements
RPM adjustment _________________ stepless adjustment of engine output via the rpm
at each selected mode
Liebherr Tool Control ____________ ten preadjustable pump flows and pressures for
add on tools (option)
Hydraulic Controls
Power distribution ________________ via monoblock control valve with integrated
safety valves
Flow summation ____________ to boom and stick
Closed-loop circuit _________ for uppercarriage swing drive
Servo circuit
Attachment and swing _____ – proportional via joystick levers
Travel _________________________ – proportional via foot pedals or removable hand
levers
– speed pre-selection
Additional functions ______________ via foot pedals or joystick toggle switch
Swing Drive
Drive by ____________________________ Liebherr swash plate motor
Transmission ______________________ Liebherr compact planetary reduction gear
Swing ring _________________________ Liebherr, sealed single race ball bearing swing
ring, internal teeth
Swing speed ______________________ 0 – 8 RPM stepless
Swing torque ______________________ 125 kNm
Holding brake _____________________ wet multi-disc (spring applied, pressure released)
Option ______________________________ pedal controlled positioning brake
Operator’s Cab
Cab _________________________________ built from deep drawn components, resiliently
mounted, sound insulated, tinted windows, front
window stores overhead, door with sliding
window
Operator’s seat ___________________ shock absorbing suspension, adjustable to
operator’s weight, 6-way adjustable seat
Joysticks ___________________________ integrated into adjustable seat consoles
Monitoring _________________________ menu driven query of current operating condi-
tions via the LCD display. Automatic monitoring,
display, warning (acoustical and optical signal)
and saving machine malfunction data, for exam-
ple, engine overheating, low engine oil pressure
or low hydraulic oil level
Heating system ___________________ standard air conditioning, combined cooler/
heater, additional dust filter in fresh air/recircu-
lated
Noise emission
ISO 6396 ___________________________ L
pA
(inside cab) = 75 dB(A)
2000/14/EC ________________________ L
WA
(surround noise) = 105 dB(A)
Undercarriage
Versions
EW _____________________________ special duty, extra wide gauge
S-EW __________________________ special duty, extra wide gauge, reinforced track
components
Drive ________________________________ Liebherr swash plate motors with integrated
brake valves on both sides
Transmission ______________________ Liebherr planetary reduction gears
Travel speed ______________________ EW: low range – 3,2 km/h
high range – 5,0 km/h
S-EW: low range – 2,8 km/h
high range – 4,1 km/h
Drawbar pull max. ________________ EW: 336 kN
S-EW: 429 kN
Track components _______________ EW: D 7, maintenance-free
S-EW: D 7 G, maintenance-free
Track rollers/Carrier rollers _____ EW: 9/2
S-EW: 10/2
Tracks ______________________________ sealed and greased
Track pads ________________________ triple grouser
Digging locks _____________________ wet multi-discs (spring applied, pressure
released)
Brake valves ______________________ integrated into travel motor
Attachment
Type ________________________________ high-strength steel plates at highlystressed points
for the toughest requirements. Complex and
stable mountings of attachment and cylinders.
Unrivalled strength, even at high loads
Hydraulic cylinders _______________ Liebherr cylinders with special seal system.
Shock absorption
Pivots _______________________________ sealed, low maintenance
Lubrication ________________________ Liebherr semi-automatic central lubrication
system