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R924

This document summarizes the key specifications of the Liebherr R 924 Compact tunnel excavator. It has an operating weight between 33,000-34,500 kg, engine output of 129 kW/175 HP, and tunnel height of 4.75-7.50 m. The excavator is equipped for tunneling applications with a special boom and tool attachment system, optimized hydraulics for a cutting head, and an operator cab with enhanced visibility and protection.

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0% found this document useful (1 vote)
244 views8 pages

R924

This document summarizes the key specifications of the Liebherr R 924 Compact tunnel excavator. It has an operating weight between 33,000-34,500 kg, engine output of 129 kW/175 HP, and tunnel height of 4.75-7.50 m. The excavator is equipped for tunneling applications with a special boom and tool attachment system, optimized hydraulics for a cutting head, and an operator cab with enhanced visibility and protection.

Uploaded by

equipment9278
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Tunneling Excavator R 924 COMPACT

Operating Weight: 33 000 – 34 500 kg


Engine Output: 129 kW / 175 HP
Tunnel Height: 4,75 – 7,50 m
Emission standard: Stage IIIA / Tier 3
Equipment
• Special tunnel boom with 2 x 45° tilting mechanism
• Optimal disposition and protection of hoses and pipes
• Liebherr quick coupler for a simpler tool changing
• Special position of cylinders to be better protected

Undercarriage
• Dozer blade with cylinder protection
• Deflector blades
• Travel drive protection
• 3 track guides at each track frame

2 R 924 Compact Tunnel Stage IIIA


Tunneling version

Operator’s cab
• Adjustable seat with synthetic leather seat cover,
easy to clean
• Good visibility in height
• Integrated FOPS protection and FGPS in the front
• Electronic components with protection
(display and keyboard)

Tunneling specificities
• Uppercarriage with steel structure
• Back-up warner
• Working headlights with protection
• Hydraulic system optimized for
the cutting head application

 R 924 Compact Tunnel Stage IIIA 3


Technical Data
Engine Swing Drive
Rating per ISO 9249 ������������� 129 kW (175 HP) at 1,800 RPM Drive by ���������������������������� Liebherr swash plate motor
Model ������������������������������� Liebherr D 934 S Transmission ���������������������� Liebherr compact planetary reduction gear
Type �������������������������������� 4 cylinder in-line Swing ring ������������������������� Liebherr, sealed single race ball bearing swing
Bore / Stroke ����������������� 122 / 136 mm ring, internal teeth
Displacement ���������������� 6.36 l Swing speed ���������������������� 0 – 12.7 RPM stepless
Engine operation ����������������� 4-stroke diesel Swing torque ���������������������� 70.2 kNm
unit pump system Holding brake ��������������������� wet multi-disc (spring applied, pressure released)
turbo-charged Option ������������������������������ pedal controlled positioning brake
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
Operator’s Cab
Fuel tank ��������������������������� 345 l Cab ��������������������������������� according to guidelines for tunnel application:
Electrical system FOPS, FGPS plus Polycarbonate ­windows on
Voltage ����������������������� 24 V attachment side
Batteries ���������������������� 2 x 135 Ah / 12 V Operator’s seat ������������������� shock absorbing suspension, adjustable to
Starter ������������������������ 24 V / 7.8 kW ­operator’s weight, 6-way adjustable seat
Alternator ��������������������� three phase current 24 V / 100 A Joysticks ��������������������������� integrated into adjustable seat consoles
Engine idling ����������������� sensor controlled 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
Hydraulic System or low hydraulic oil level
Hydraulic pump ������������������� Positive Control Classic, regulation with Liebherr Noise emission
variable flow swash plate double pump, propor- 2000/14/EC ������������������������ LWA (surround noise) = 102 dB(A)
tional controller hydraulically steered
Max. flow ��������������������� 2 x 214 l/min.
Max. pressure ��������������� 350 bar
Pump regulation ������������������ electro-hydraulic with electronic engine speed
sensing regulation, pressure compensation, flow
Undercarriage
compensation, automatic oil flow optimizer, HD-SL ������������������������������ heavy duty, wide gauge and longer crawler length
swing circuit with priority and torque control Drive �������������������������������� Liebherr swash plate motors with integrated
Hydraulic tank �������������������� 147 l brake valves on both sides
Hydraulic system ����������������� max. 360 l Transmission ���������������������� Liebherr planetary reduction gears
Hydraulic oil filter ����������������� 1 full flow filter (20 µm) in return line with inte­ Travel speed ���������������������� low range – 3.2 km/h
grated fine filter area (5 µm) and an additional high range – 5.3 km/h
leakage filter Net drawbar pull on crawler ���� 208 kN
Track components ��������������� D 6 C, maintenance-free
Hydraulic oil cooler �������������� compact cooler, consisting of a water and fuel Track rollers / Carrier rollers ����� 8 / 2
cooler, sandwiched with hydraulic oil cooler and Track pads ������������������������ double or triple grouser
after-cooler cores and hydro­statically driven fan Tracks ������������������������������ sealed and greased
MODE selection ������������������ adjustment of machine performance and the Digging locks ��������������������� wet multi-discs (spring applied, pressure
hydraulics via a mode selector to match released)
­application Brake valves ���������������������� integrated into travel motor
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
Attachment
­sensitive movements Type �������������������������������� combination of resistant steel plates and cast
Super-Finish ����������������������� adjustable working speed for grading steel components
RPM adjustment ����������������� stepless adjustment of engine output via the rpm Hydraulic cylinders ��������������� Liebherr cylinders with special seal-system,
at each selected mode shock absorbed
Tool Control ����������������������� ten preadjustable pump flows and pressures for Pivots ������������������������������� sealed, low maintenance
add on tools Lubrication ������������������������ fully automatic Liebherr central lubrication system
(except bucket tilt linkage)
Hydraulic connections ���������� pipes and hoses equipped with SAE split-flange
connections
Basic boom ����������������������� 3.03 m or 3.30 m with 2 x 45° rotator
Hydraulic Controls Stick �������������������������������� 3.20 m or 4.20 m with integrated bucket tilt
Power distribution ��������������� via monoblock control valve with integrated ­cylinder
­safety valves Bucket ����������������������������� HD ripper bucket with cutting width 700 mm
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 for milling
cutter / hammer, 2 x 45° rotator and dozer blade

4 R 924 Compact Tunnel Stage IIIA


Dimensions
E
F D

W
C
H

K P

R0286
L N
U S
V1 B
X1 G

mm Boom 3.03 m with 2 x 45° Rotator


A2,990 and Stick 3.20 mmm
C3,230 V8,080
D1,690 V18,240
E1,690 W3,860
F1,415 W13,710
H2,525 X8,360
K1,145 X18,510
L3,750
P1,065 Boom 3.30 m with 2 x 45° Rotator
S2,400 and Stick 4.20 mmm
U5,070 V9,300
N600 W4,000
B3,000 X9,600
G3,160

E
F D
A

W
C
H

K P

R0285
L N
U S
V B
X G

 R 924 Compact Tunnel Stage IIIA 5


Tunneling Excavator
with Boom 3.03 m, 2 x 45° Rotator and Stick 3.20 m

ft m
30 R0288
9

8
25

20 6 V

5
15
4

10 3

5500
5125
H

6800
2
5
1

0 0
940
-1
-5 3280
-2 4980

-10 -3

-4
-15
-5
10 9 8 7 6 5 4 3 2 1 0 m

30 25 20 15 10 5 0 ft

Digging Envelope Operating Weight and Ground Pressure


Basic boom bolted in position II of upper carriage Operating weight includes basic machine with boom 3.03 m, 2 x 45°
rotator, stick 3.20 m, quick coupler 48 and bucket 0.16 m3 (700 kg).
Tunnel height Advance
H V Undercarriage HD-SL
m m Pad width mm 600
4.75 1.20 Weight kg 33,000
5.00 2.05 Ground pressure kg/cm2 0.68
5.50 2.25
6.00 2.10

Digging Forces
without Quick Coupler

Max. digging force ISO kN 142


t14.5
Max. breakout force ISO kN 145
t14.8

6 R 924 Compact Tunnel Stage IIIA


Tunneling Excavator
with Boom 3.30 m, 2 x 45° Rotator and Stick 4.20 m

ft m R0287

30 9

8
25

20 V
6

5
15
4

10 3

5500
5400
H

7370
2
5
1

0 0

1510
-1
-5
-2

-10 -3

-4
-15
-5
10 9 8 7 6 5 4 3 2 1 0 m

30 25 20 15 10 5 0 ft

Digging Envelope Operating Weight and Ground Pressure


Basic boom bolted in position II of upper carriage Operating weight includes basic machine with boom 3.30 m, 2 x 45°
rotator, stick 4.20 m, quick coupler 48 and bucket 0.16 m3 (700 kg).
Tunnel height Advance
H V Undercarriage HD-SL
m m Pad width mm 600
5.50 2.50 Weight kg 34,500
6.00 2.40 Ground pressure kg/cm2 0.71
6.50 2.20
7.00 2.10
7.50 1.90

Digging Forces
without Quick Coupler

Max. digging force ISO kN 116


t11.8
Max. breakout force ISO kN 144
t14.7

 R 924 Compact Tunnel Stage IIIA 7


Equipment

Printed in Germany by Eberl RG-BK-RP LFR/SP 10492659-1-01.16_enGB All illustrations and data may differ from standard equipment. Subject to change without notice. All indicated loads are based in accordance with ISO 9248.
Undercarriage Operator’s Cab
3 track guide at each track frame • 6-way adjustable operator seat with synthetic leather seat cover •
Double grouser pads 600 mm • Additional flood lights •
Dozer blade with cylinder protection • Additional lights on cab roof (rear) •
Idler protection • Cab for tunneling application •
Lifetime lubricated track rollers • Display cover •
Mud guards • Emergency exit rear window •
Reinforced base-plate center-piece • Fire extinguisher •
Tracks sealed and greased • Multi-function display •
Travel gear protection • Polycarbonate window at attachment side and rear window •
Two-stage travel motors • Seat belt •
Structural design according to guidelines: FOPS, FGPS •
Structural design according to guidelines: ROPS +
Totally enclosed cab (additional door and window) with windshield wiper +
Uppercarriage
Alternator 100 A •
Back-up alarm •
Electrical device shut off • Attachment
Engine hood with lift help and mechanical locking • 12 t lifting hook with safety link on bucket or on quick coupler •
Fire extinguisher • Automatic lubrication system (except bucket tilt linkage) •
Handrails, non slip surfaces • Cylinders with shock absorber •
Maintenance-free HD-batteries • Hydraulic lines for additional tools •
Maintenance-free swing brake lock • Hydraulic lines protection •
Protection grid on radiator fan • Mechanical quick coupler •
Radiator protection grid • Piston rod cover for hoist cylinder •
Sound insulation • ReGeneration plus •
Tool kit • SAE split flanges on all high pressure lines •
Upper carriage protection • Sealed pivots / shaft seal between bucket and stick •
Customized colors + Work light on boom and stick •
Electric fuel tank filler pump + Customized colors +
Foot pedal swing positioning brake + High pressure circuit +
Liebherr line of buckets +
Quick disconnect hose couplers for additional tools +
Special application buckets +
Hydraulic System
Additional hydraulic circuits •
Control kit for emergency towing •
Electronic pump regulation •
Filter with integrated fine filter area (5 μm) •
Flow compensation •
Hydraulic tank shut-off valve •
Liebherr Positive Control •
Pressure compensation •
Pressure storage for controlled lowering of attachments
with engine turned off •
Pressure test ports •
Stepless work mode selector •
Tool Control •
Bio-degradable hydr. oil +
Filter for secondary circuit +
Hydraulic control for rotary drive +

Engine
After-cooled •
Air filter with pre-cleaner main- and safety element •
Conform with stage IIIA / Tier 3 emission standard •
Fuel water separator •
Laminated radiator •
Sensor controlled engine idling •
Turbo-charged •
Unit pump system •
Liebherr particle filter +


  = Standard, + = Option

Options and /or special attachments, supplied by vendors other than Liebherr, are only to be installed with the
knowledge and approval of Liebherr in order to retain warranty.

Liebherr-France SAS
2 avenue Joseph Rey, B.P. 90287, FR-68005 Colmar Cedex
 +33 389 21 30 30, Fax +33 389 21 37 93
www.liebherr.com, E-Mail: info.lfr@liebherr.com
www.facebook.com/LiebherrConstruction

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