Technical data, Travel drive, Axles – Liebherr L 566 User Manual
Page 15: Brakes, Steering, Operator’s cab, Noise emission, Capacities, Attachment, Attachment hydraulics
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Technical Data
L 550 - L 580
15
Travel Drive
Stepless hydrostatic travel drive
Design
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Swash plate type variable flow pump and two
varia ble axial piston motors in closed loop circuit
with one axle transfer case. Direction of travel in re-
versed by changing the flow-direction of the
variable-displacement pump
Filtering system
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Suction return line filter for closed circuit
Control
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By travel and inching pedal. The inching pedal makes
it possible to control the tractive and directional
forces steplessly at full engine speed. The Liebherr
joystick is used to control forward and reverse travel
Travel speed range
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Speed range 1
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0 – 6.2 mph
Speed range 2 and A2
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0 – 12.4 mph
Speed range A3
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0 – 24.9 mph
The quoted speeds apply with the tires that are
standard equipment on the loader
Axles
Four-wheel drive
Front axle
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Fixed
Rear axle
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Centre pivot, with 13° oscillating angle to each side
L 550
L 556
L 566
L 580
Height of obstacles which
can be driven over
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1’6.1” 1’6.1” 1’7.3” 1’7.3”
With all four wheels remaining in contact with the
ground
Differentials
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Automatic limited-slip differentials
Reduction gear
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Planetary final drive in wheel hubs
Track width
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6’7” with all types of tires (L 550, L 556)
7’4” with all types of tires (L 566, L 580)
Brakes
Wear-free service brake
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Self-locking of the hydrostatic travel drive (acting on
all four wheels) and additional pump-accumulator
brake system with wet multi-disc brakes
(two sepa rate brake circuits)
Parking brake
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Electro-hydraulically actuated spring-loaded disc
brake system on the transmission
The braking system meets the requirements of the EC guidelines 71/320.
Steering
Design
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“Load-sensing” swash plate type variable flow pump
with pressure cut-off and flow control. Central pivot
with two double-acting, damped steering cylinders
Angle of articulation
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40° (to each side)
Emergency steering
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Electro-hydraulic emergency steering system
Operator’s Cab
Design
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On elastic bearing on rear section, soundproof
ROPS/FOPS cab. Operator’s door with optional
sliding window, 180° opening angle, fold-out window
on right side with opening angle, front windscreen
made of compound safety glass, green tinted as
standard, side windows made of single-pane safety
glass, grey tinted, continuously adjustable steering
column and joystick control as standard, heated rear
window
ROPS roll over protection per EN/ISO 3471/
EN 474-1
FOPS falling objects protection per EN/ISO 3449/
EN 474-1
Liebherr Operator’s seat
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6 way adjustable seat belt, passive climate system
and heating system; air suspension with automatic
weight adjustment
Cab heating and ventilation
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Operator’s cab with 4-level air control, cooling water
heating, defroster and air conditioning with electronic
valve control, as well as electronic fresh/recirculated
air control, filter system with pre-filter, fresh air
filter and recirculated air filter, easily replaced,
air con ditioning as standard
Noise Emission
ISO 6396
L 550
L 556
L 566
L 580
L
pA
(inside cab)
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68 dB(A)
68 dB(A)
68 dB(A)
68 dB(A)
2000/14/EC
L
WA
(surround noise)
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104 dB(A)
104 dB(A)
105 dB(A)
105 dB(A)
Capacities
L 550
L 556
L 566
L 580
Fuel tank
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gal 79
79
106
106
Engine oil
(including filter change)
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gal 10.6
10.6
11.6
11.6
Pump distribution gearbox
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gal 0.7
0.7
0.7
0.7
Transmission
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gal 3.0
3.0
3.0
3.0
Coolant
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gal 11.1
11.1
13.7
13.7
Front axle
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gal 9.2
9.2
11.1
11.1
Rear axle
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gal 9.2
9.2
10.6
11.1
Hydraulic tank
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gal 35.7
35.7
35.7
35.7
Hydraulic system, total
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gal 64.7
64.7
70.0
70.0
Air condition system R134a
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lb 2.8
2.8
2.8
2.8
Attachment
Geometry
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Powerful Z-bar linkage with tilt cylinder and cast steel
cross-tube
Bearings
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Sealed
Cycle time at nominal load
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L 550
L 556
L 566
L 580
Z-bar linkage
Lifting
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5.5 s
5.5 s
5.5 s
5.5 s
Dumping
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2.3 s
2.3 s
2.0 s
2.0 s
Lowering (empty)
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2.7 s
2.7 s
3.5 s
3.5 s
Industrial lift arm
Lifting
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5.5 s
5.5 s
5.5 s
5.5 s
Dumping
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3.5 s
3.5 s
3.0 s
3.2 s
Lowering (empty)
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2.7 s
2.7 s
3.5 s
3.5 s
Attachment Hydraulics
Design
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“Load-sensing” swash plate type variable flow pump
with output and flow control, and pressure cut-off in
the control block
Cooling
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Hydraulic oil cooling using thermostatically controlled
fan and oil cooler
Filtering
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Return line filter in the hydraulic reservoir
Control
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“Liebherr-Joystick” with hydraulic servo control
Lift circuit
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Lifting, neutral, lowering
and float positions controlled by Liebherr joystick
with detent
Tilt circuit
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Tilt back, neutral, dump
Automatic bucket return to dig
L 550
L 556
L 566
L 580
Max. flow
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gpm 62
62
77
77
Max. pressure
Z-bar linkage ���������� psi 4,786
5,221
5,076
5,511
Industrial lift arm ������� psi 5,076
5,511
5,511
5,511