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

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