Liebherr R 944 C Litronic High Rise User Manual

Machine for Industrial Applications

R 944 C

litronic` High Rise

Operating Weight:

71,600 – 73,700 kg

Engine Output:

190 kW / 258 HP

Electric Motor Output:

200 kW / 272 HP

Technical Data

Engine

Rating per ISO 9249 190 kW (258 HP) at 1,800 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 370 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 application

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 LpA (inside cab) =   75 dB(A) 2000/14/EC LWA (surround noise) = 105 dB(A)

Undercarriage

Version HR

Drive Liebherr swash plate motors with integrated­ brake valves on both sides

Transmission Liebherr planetary reduction gears Travel speed low range – 3.0 km/h

high range – 3.8 km/h Drawbar pull max. 320 kN

Track components D 7 G, maintenance-free Track rollers/Carrier rollers 13/3

Tracks sealed and greased Track pads flat pad

Digging locks wet multi-discs (spring applied, pressure ­released)

Brake valves integrated into travel motor

Attachment

Type high-strength steel plates at highly-stressed 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

VarioLiftPlus variable boom mounting positions for optimized lift capacities

2 R 944 C Litronic High Rise

Hydraulic pump for swing drive

Version with Electric Motor

Electric Motor

Motor asynchronous three-phase, cage rotor enclosed in cast iron envelope, special Liebherr design

Power rating

(as per CEI 34-1) 200 kW (272 HP) at 1,485 RPM Rated voltage 400 V – 50 Hz *

Number of poles 4

Design type horizontal axle B35 axle height 315 mm painting: RAL 7031

Standard degree of protection IP55 – steel flange FF600 Insulation class F, thermal loading: Class B,

ambient temperature 40 °C

Starter star/delta

Heat protection for windings Heat protection for bearings

Anti-condensation heating system resistors

Electric System

The 400 V electrical cabinet provides a degree of protection to IP55. This houses the following components:

–Main motorised isolator, controlled from the cab

–Star/delta starter for motor

–Outlets for supplying auxiliary elements: heating, climate control

–Various heat protection devices

–Resistors for controlling the temperature of the cabinet

–Booster pump integrated in the cabinet: Cabinet air filtered (option)

–Transformers – rectifier for 24 V control circuit

–Motor protection attachment

–Auxiliary batteries: 2 x 135 Ah/12 V: secured functions: lighting for excavator/ attachment position (option)

Hydraulic System

Hydraulic pump

for attachment and

travel drive two Liebherr variable flow, swash plate pumps Max. flow 2 x 305 l/min.

Max. pressure 350 bar

Pump regulation electro-hydraulic with electronic engine speed sensing regulation, pressure compensation, automatic oil flow optimizer

reversible, variable flow, swash plate pump, ­closed-loop circuit

Max. flow 205 l/min. Max. pressure 370 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 radiator equipped with hydrostatic drive fan for cooling the hydraulic oil and climate control ­condenser

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 hydraulic motor with integrated brake valves

Transmission Liebherr compact planetary reduction gear Swing ring Liebherr, sealed single race ball bearing swing

ring, internal teeth Swing speed 0 – 7.9 RPM stepless Swing torque 119 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 digital display of current operating

conditions. Automatic monitoring, display, warning­ (audible and visual signal) and saving

of machine malfunction data, such as overheating of windings, motor bearings, or low hydraulic oil level

Heating system standard air conditioning, combined cooler/­ heater, additional dust filter in fresh air/recircu­ lated

Undercarriage

Version HR

Drive Liebherr hydraulic motor with integrated brake valves on both sides

Transmission Liebherr planetary reduction gears Travel speed low range – 3.0 km/h

high range – 3.8 km/h Drawbar pull max. 320 kN

Track components D 7 G, maintenance-free Track rollers/Carrier rollers 13/3

Tracks sealed and greased Track pads flat pad

Digging locks wet multi-discs (spring applied, pressure ­released)

Brake valves integrated into travel motor

Attachment

Type high-strength steel plates at highly-stressed 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

VarioLiftPlus variable boom mounting positions for optimized lift capacities

* Other voltages and frequencies possible on request.

R 944 C Litronic High Rise 3

Dimensions

E

A1

D

A

C

W	H

			K
					Q		P
	L			N
	U					S
	Z					B
	V					G
	X
		mm	Industrial-Type Straight Boom 9.50 m
A		6,150	and Industrial Stick	m	7.30	7.30*	8.80	8.80*
A1		3,050	V	mm	8,850	8,350	7,000	7,300
C	with Rigid Cab Elevation 2 m	7,700	W	mm	5,700	6,160	5,700	6,160
C*	with Rigid Cab Elevation 2 m	8,160	X	mm	14,300	14,300	14,300	14,300
C with Hydraulic Cab Elevation Parallelogram
	+ Intermediate Piece 0,5 m	6,170	Industrial-Type Straight Boom 10.50 m
C*	with Hydraulic Cab Elevation Parallelogram		and Industrial Stick	m	8.80	8.80*	9.50	9.50*
	+ Intermediate Piece 0,5 m	6,630	V	mm	8,000	8,300	7,150	7,400
D		4,250	W	mm	5,700	6,160	5,700	6,160
E		4,350	X	mm	15,250	15,250	15,250	15,250
F		4,100
H	with Rigid Cab Elevation 2 m	5,300	Industrial-Type Straight Boom 11.50 m
H*	with Rigid Cab Elevation 2 m	5,760	and Industrial Stick	m	9.50	9.50*	12.00	12.00*
H with Hydraulic Cab Elevation Parallelogram			V	mm	8,150	8,450	**	**
	+ Intermediate Piece 0,5 m	6,170	W	mm	5,700	6,160	5,700	6,160
H*	with Hydraulic Cab Elevation Parallelogram		X	mm	16,250	16,250	16,250	16,250
	+ Intermediate Piece 0,5 m	6,630
K		3,600	Industrial-Type Gooseneck Boom 11.50 m
K*		4,060	and Industrial Stick	m	9.50	9.50*	12.00	12.00*
L		6,000	V	mm	7,400	7,500	**	**
P		1,280	W	mm	5,950	6,400	5,950	6,400
Q		555	X	mm	16,100	16,100	16,100	16,100
S		5,000	** = without Stick
U		7,000
Z		7,750
N		750
B		5,830
G		5,860
E = Tail radius
* = with Elevation
		E				A1
	F	D				A

W	H	C
	K
		P
		Q

L	N
U	S
Z	B
V	G

X

4 R 944 C Litronic High Rise

VarioLiftPlus

Variable Boom Mounting Positions for Optimized Lift Capacities

with the same working range

with a different working range

Hole A

Hole B

Hole 3

Hole 2

Hole C

Hole D

Hole 3

Hole 2

	2A
2A	3B
	3B
	3A

	Kinematic variant 2A:	Kinematic variant 3A:
	Increased lift capacities above ground level	Altered range curve with additional reach
	Kinematic variant 3B:	depth, e.g. for unloading from ships
Version 2A	Increased lift capacities below ground level
	and when working at large outreach
		with a different working range

3D

3D

3C

Kinematic variant 3D:

Kinematic variant 3C:

Increased lift capacities below ground level

Altered range curve with additional reach

and when working at large outreach

depth, e.g. for unloading from ships

Version 3D

R 944 C Litronic High Rise 5

Industrial Attachment

with Industrial-Type Straight Boom 9.50 m

ft	m
70	22
	20
60	18
50	16
	14
40	12
30	10
	8
20	6
	4
10
	2
0	0
	-2					1
-10
	-4					3
-20	-6					2
							4
	-8
	20	18	16	14	12	10	8	6	4	2	0 m
		60	50		40	30		20		10	0	ft

Attachment Envelope

Kinematic variant 2A

1 with industrial stick 7.30 m

2 with industrial stick 8.80 m

3 with industrial stick 7.30 m and grapple model 70 C 4 with industrial stick 8.80 m and grapple model 70 C

Operating Weight

and Ground Pressure

Operating weight includes basic machine with hydraulic cab elevation parallelogram + intermediate piece 0.5 m, counterweight 11.0 t, indus- trial-type straight boom 9.50 m, industrial stick 7.30 m and grapple model 70 C with 5 semi-closed tines 1.10 m3.

Undercarriage		HR
Pad width	mm	750
Weight	kg	71,600
Ground pressure	kg/cm2	0.80

Operating weight includes basic machine with hydraulic cab elevation parallelogram + intermediate piece 0.5 m, counterweight 11.0 t, indus- trial-type straight boom 9.50 m, industrial stick 8.80 m and grapple model 70 C with 5 semi-closed tines 1.10 m3.

Undercarriage		HR
Pad width	mm	750
Weight	kg	71,900
Ground pressure	kg/cm2	0.80

6 R 944 C Litronic High Rise

Lift Capacities

with Industrial-Type Straight Boom 9.50 m

Industrial Stick 7.30 m (Variant 2A)

4.5 m

6.0 m

7.5 m

9.0 m

10.5 m 12.0 m 13.5 m 15.0 m 16.5 m 18.0 m 19.5 m 21.0 m 22.5 m

Under-

m

carriage

m

25.5

HR

24.0

HR

22.5

HR

21.0

HR

19.5

HR

11.6*

11.6*

10.0*

10.0*

6.91

18.0

HR

11.5*

11.5*

9.3*

9.3*

8.3*

8.3*

9.50

16.5

HR

12.4*

12.4*

11.2*

11.2*

9.2*

9.2*

7.4*

7.4*

11.31

15.0

HR

12.9*

12.9*

11.5*

11.5*

10.3*

10.3*

8.7*

8.7*

6.9*

6.9*

12.69

13.5

HR

13.0*

13.0*

11.5*

11.5*

10.3*

10.3*

9.3*

9.3*

7.5*

7.5*

6.6*

6.6*

13.78

12.0

HR

13.2*

13.2*

11.6*

11.6*

10.3*

10.3*

9.3*

9.3*

8.3*

8.3*

6.4*

6.4*

14.62

10.5

HR

13.6*

13.6*

11.8*

11.8*

10.4*

10.4*

9.3*

9.3*

8.3*

8.3*

7.3*

7.3*

6.4*

6.4*

15.28

9.0

HR

15.4*

15.4*

14.2*

14.2*

12.2*

12.2*

10.6*

10.6*

9.4*

9.4*

8.3*

8.3*

7.3*

7.3*

6.3*

6.3*

15.76

7.5

HR

17.9*

17.9*

18.2*

18.2*

14.8*

14.8*

12.5*

12.5*

10.8*

10.8*

9.4*

9.4*

8.3*

8.3*

7.2*

7.2*

6.2*

6.2*

16.09

6.0

HR

26.0*

26.0*

19.3*

19.3*

15.4*

15.4*

12.8*

12.8*

10.9*

10.9*

9.4*

9.4*

8.2*

8.2*

7.0*

7.0*

5.8*

5.8*

16.27

4.5

HR

9.7*

9.7*

19.8*

19.8*

15.6*

15.6*

12.8*

12.8*

10.8*

10.8*

9.3*

9.3*

8.0*

8.0*

6.7*

6.7*

5.4*

5.4*

16.31

3.0

HR

6.3*

6.3*

19.3*

19.3*

15.3*

15.3*

12.6*

12.6*

10.6*

10.6*

9.0*

9.0*

7.6*

7.6*

6.3*

6.3*

4.9*

4.9*

16.22

1.5

HR

6.5*

6.5*

14.3*

14.3*

14.5*

14.5*

12.0*

12.0*

10.0*

10.0*

8.4*

8.4*

7.0*

7.0*

5.6*

5.6*

4.3*

4.3*

15.98

0

HR

7.7*

7.7*

13.6*

13.6*

13.0*

13.0*

10.9*

10.9*

9.1*

9.1*

7.6*

7.6*

6.2*

6.2*

4.5*

4.5*

4.4*

4.4*

15.11

– 1.5

HR

12.5*

12.5*

10.9*

10.9*

9.3*

9.3*

7.8*

7.8*

6.3*

6.3*

5.1*

5.1*

13.31

– 3.0

HR

– 4.5

HR

– 6.0

HR

– 7.5

HR

– 9.0

HR

Industrial Stick 8.80 m (Variant 2A)

4.5 m

6.0 m

7.5 m

9.0 m

10.5 m 12.0 m 13.5 m 15.0 m 16.5 m 18.0 m 19.5 m 21.0 m 22.5 m

Under-

m

carriage

m

25.5

HR

24.0

HR

22.5

HR

21.0

HR

10.3*

10.3*

8.6*

8.6*

7.15

19.5

HR

10.0*

10.0*

8.4*

8.4*

7.0*

7.0*

9.90

18.0

HR

9.6*

9.6*

8.3*

8.3*

6.2*

6.2*

11.85

16.5

HR

10.2*

10.2*

9.3*

9.3*

8.0*

8.0*

5.7*

5.7*

13.34

15.0

HR

10.5*

10.5*

9.6*

9.6*

8.8*

8.8*

7.4*

7.4*

5.4*

5.4*

14.53

13.5

HR

10.6*

10.6*

9.6*

9.6*

8.7*

8.7*

8.0*

8.0*

6.4*

6.4*

5.2*

5.2*

15.48

12.0

HR

10.7*

10.7*

9.6*

9.6*

8.7*

8.7*

8.0*

8.0*

7.2*

7.2*

5.1*

5.1*

16.24

10.5

HR

11.0*

11.0*

9.8*

9.8*

8.8*

8.8*

8.0*

8.0*

7.2*

7.2*

6.0*

6.0*

5.0*

5.0*

16.83

9.0

HR

11.7*

11.7*

11.3*

11.3*

10.0*

10.0*

8.9*

8.9*

8.0*

8.0*

7.2*

7.2*

6.3*

6.3*

5.0*

5.0*

17.27

7.5

HR

11.5*

11.5*

13.5*

13.5*

11.8*

11.8*

10.3*

10.3*

9.1*

9.1*

8.1*

8.1*

7.2*

7.2*

6.3*

6.3*

5.0*

5.0*

17.57

6.0

HR

13.4*

13.4*

16.7*

16.7*

14.5*

14.5*

12.2*

12.2*

10.5*

10.5*

9.2*

9.2*

8.1*

8.1*

7.1*

7.1*

6.1*

6.1*

5.1*

5.1*

17.74

4.5

HR

25.6*

25.6*

19.0*

19.0*

15.1*

15.1*

12.5*

12.5*

10.6*

10.6*

9.2*

9.2*

8.0*

8.0*

6.9*

6.9*

5.9*

5.9*

4.7*

4.7*

17.78

3.0

HR

11.5*

11.5*

19.4*

19.4*

15.3*

15.3*

12.6*

12.6*

10.6*

10.6*

9.1*

9.1*

7.8*

7.8*

6.7*

6.7*

5.5*

5.5*

4.4*

4.4*

17.69

1.5

HR

7.9*

7.9*

18.9*

18.9*

15.0*

15.0*

12.3*

12.3*

10.3*

10.3*

8.8*

8.8*

7.5*

7.5*

6.3*

6.3*

5.0*

5.0*

3.9*

3.9*

17.47

0

HR

7.8*

7.8*

15.3*

15.3*

14.1*

14.1*

11.6*

11.6*

9.7*

9.7*

8.2*

8.2*

6.9*

6.9*

5.6*

5.6*

4.2*

4.2*

3.6*

3.6*

16.98

– 1.5

HR

8.5*

8.5*

14.3*

14.3*

12.7*

12.7*

10.5*

10.5*

8.8*

8.8*

7.4*

7.4*

6.1*

6.1*

4.7*

4.7*

3.9*

3.9*

15.76

– 3.0

HR

12.4*

12.4*

10.6*

10.6*

8.9*

8.9*

7.5*

7.5*

6.1*

6.1*

4.8*

4.8*

4.6*

4.6*

13.70

– 4.5

HR

– 6.0

HR

– 7.5

HR

– 9.0

HR

Height

Can be slewed through 360°

In longitudinal position of undercarriage

Max. reach * Limited by hydr. capacity

The lift capacities are stated in metric tonnes (t) on the lifting gear’s stick tip, and can be lifted 360° on firm, level supporting surface. Capacities are valid for 750 mm track flat pads. Indicated loads are based on ISO 10567 standard and do not exceed 75 % of tipping or 87 % of hydraulic ­capacity (indicated via *). Lifting capacity of the excavator is limited by machine stability, hydraulic capacity and maximum permissible load of the load hook.

According to European Standard, EN 474-5: In the European Union excavators have to be equipped with an overload warning device, a load diagram and automatic check valves on the hoist cylinders, when they are used for lifting operations which require the use of lifting accessories.

R 944 C Litronic High Rise 7

Industrial Attachment
with Industrial-Type Straight Boom 9.50 m
ft	m										Attachment Envelope
70	22
	20										Kinematic variants 3A/3B
60	18										1 with industrial stick 7.30 m (3B)
											2 with industrial stick 7.30 m and grapple model 70 C (3B)
	16										3 with industrial stick 7.30 m (3A)
50											4 with industrial stick 7.30 m and grapple model 70 C (3A)
	14
40	12										Operating Weight
	10										and Ground Pressure
30
	8										Operating weight includes basic machine with hydraulic cab elevation
20	6										parallelogram + intermediate piece 0.5 m, counterweight 11.0 t, indus-
											trial-type straight boom 9.50 m, industrial stick 7.30 m and grapple
	4										model 70 C with 5 semi-closed tines 1.10 m3.
											Undercarriage		HR
10
	2										Pad width	mm	750
0	0										Weight	kg	71,600
											Ground pressure	kg/cm2	0.80
	-2				1
-10
					3
	-4
						2
-20	-6						4
	-8
	18	16	14	12	10		8	6	4	2	0 m
	60	50		40		30		20	10		0 ft
ft	m										Attachment Envelope
70	22										Kinematic variants 3A/3B
	20										1 with industrial stick 8.80 m (3B)
60	18										2 with industrial stick 8.80 m and grapple model 70 C (3B)
											3 with industrial stick 8.80 m (3A)
50	16										4 with industrial stick 8.80 m and grapple model 70 C (3A)
	14
40	12										Operating Weight
30	10										and Ground Pressure
	8										Operating weight includes basic machine with hydraulic cab elevation
20	6										parallelogram + intermediate piece 0.5 m, counterweight 11.0 t, indus-
											trial-type straight boom 9.50 m, industrial stick 8.80 m and grapple
	4										model 70 C with 5 semi-closed tines 1.10 m3.
10											Undercarriage		HR
	2
0	0										Pad width	mm	750
											Weight	kg	71,900
	-2										Ground pressure	kg/cm2	0.80
-10					1
	-4
-20	-6					3
						2
	-8						4
-30	20	18	16	14	12	10	8	6	4	2	0 m
		60	50		40		30	20		10	0 ft
8 R 944 C Litronic High Rise