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Technical data, Engine, Hydraulic system – Liebherr R 926 User Manual

Page 14: Hydraulic controls, Swing drive, Operator’s cab, Undercarriage, Attachment

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14

R 926 Litronic

Technical Data

Engine

Rating per ISO 9249

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129 kW (175 HP) at 1,800 RPM

Model

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Liebherr D 934 A7

Type

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4 cylinder in-line

Bore/Stroke

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122/150 mm

Displacement

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7.0 l

Engine operation

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4-stroke diesel

Common-Rail, bi-turbo

Exhaust gas treatment

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particle filter with active regeneration

emission standard stage IIIB / Tier 4i

Cooling

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water-cooled and integrated motor oil cooler,

after-cooled and fuel cooled

Air cleaner

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dry-type air cleaner with pre-cleaner, primary and

safety elements

Fuel tank

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444 l

Electrical system

Voltage

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24 V

Batteries

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2 x 180 Ah/12 V

Starter

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24 V/7.8 kW

Alternator

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three phase current 28 V/100 A

Engine idling

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sensor-controlled

Motor management

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connection to the integrated excavator system

controlling via CAN-BUS to the economical utili-

sation of the service that is available

Hydraulic System

Hydraulic system

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Positive Control. Dual circuit hydraulic system for

independent and need-based quantity allotment

via the hydraulic pumps; sensor-guided. Features

high system dynamics and sensibility provided by

integrated system controlling

Hydraulic pump

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Liebherr variable displacement pump built in

transversal plate style, in parallel arrangement

with integrated transfer box

Max. flow

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2 x 238 l/min.

Max. pressure

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380 bar

Pump management

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electronic pump management via the integrated

system controlling (CAN-BUS) synchronous to

the control block

Hydraulic tank

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287 l

Hydraulic system

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max. 360 l

Hydraulic oil filter

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1 full flow filter (10 μm)

Hydraulic oil cooler

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compact cooler, consisting of a water cooler,

sandwiched with hydraulic oil cooler, gearbox oil

cooler, fuel cooler and after-cooler cores and

hydrostatically driven fan

MODE selection

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adjustment of engine and hydraulic performance

via a mode pre-selector to match application, e.g.

for especially economical and environmentally

friendly operation or for maximum digging per-

formance and heavy-duty jobs

RPM adjustment

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stepless adjustment of engine output via RPM at

each selected mode

Tool Control

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10 preadjustable pump flows and pressures for

add-on tools

Hydraulic Controls

The controlling is conducted via the integrated excavator system technology,

input and output modules, communicated via the CAN-BUS with the electronic

central unit.

Power distribution

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via control valve with integrated safety valves

Servo circuit

Attachment and swing

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proportional via joystick levers

Travel

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– with proportionally functioning foot pedals and

adjusted with a plugable lever

– speed pre-selection

Additional functions

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proportional regulation via slide switches or foot

pedals

Swing Drive

Drive by

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Liebherr swash plate motor, shockless and anti-

reaction

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 – 11 RPM stepless

Swing torque

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79 kNm

Holding brake

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wet multi-disc (spring applied, pressure released)

Operator’s Cab

Cab

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ROPS safety cab structure with individual wind-

screens or featuring a slide-in subpart under the

ceiling, work headlights integrated in the ceiling,

a door with a side window (can be opened on

both sides), large stowing and depositing possi-

bilities, shock-absorbing suspension, sound-

damping insulating, tinted laminated safety glass,

separate window shades for the sunroof window

and windscreen, 12 V plug, storage bins, lunch-

box, cup holder

Operator’s seat

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Comfort seat, airsprung with automatic weight

adjustment, vertical and horizontal seat damping

including consoles and joysticks. Seat and arm-

rests adjustable separately and in combination,

seat heating as standard

Control system

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arm consoles, swinging with the seat

Operation and displays

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large high resolution colour display with self-

explanatory operation via touch screen, video,

versatile adjusting, control and monitoring facili-

ties, e.g. climate control, implement and tool

parameters

Air-conditioning

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standard automatic air-conditioning, ambient air

function, fast de-icing and demisting at the press

of a button, air vents can be operated via a menu;

ambient air and fresh air filters can be easily

replaced and are accessible from the outside;

heating-cooling unit, designed for extreme out-

side temperatures, sensors for solar radiation,

inside and outside temperatures

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) = 103 dB(A)

Undercarriage

Versions

NLC

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gauge 2,000 mm

SLC

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gauge 2,250 mm

LC

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standard gauge 2,380 mm

WLC

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gauge 2,590 mm

Drive

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Liebherr swash plate motors with integrated

brake valves on both sides

Transmission

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Liebherr planetary reduction gears

Travel speed

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low range – 3.7 km/h

high range – 6.1 km/h

Net drawbar pull on crawler

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226 kN

Track components

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B 60, maintenance-free

Track rollers/Carrier rollers

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9/2

Tracks

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sealed and greased

Track pads

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triple-grouser

Digging locks

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wet multi-discs (spring applied, pressure

released)

Brake valves

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integrated into travel motor

Lashing eyes

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integrated

Attachment

Type

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combination of resistant steel plates and cast

steels components

Hydraulic cylinders

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Liebherr cylinders with special seal-system,

shock protection

Pivots

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sealed, low maintenance

Lubrication

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automatic central lubrication system (except link

and tilt geometry)

Hydraulic connections

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pipes and hoses equipped with SAE splitflange

connections

Bucket

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fitted as standard with Liebherr tooth system