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Technical Description PR 744Crawler Tractor
Engine Output 184 kW/250 hpOperating Weight 24,605 29,115 kg/54,245 64,188 lb
litronic
8/14/2019 Liebherr Track Tensioner Tool
2/82 PR 744 Litronic
Basic machine
EngineLiebherr diesel engine D 936-L A6
Emission regulations according to
2004/26/EEC Stage IIIa, EPA/CARB Tier 3
Rating (ISO 9249) 184 kW / 250 hp
Rating (SAE J1349) 184 kW / 247 hp
Rated speed 1,600 1/min
Displacement 10.5 l / 641 in3
Design 6 cylinder in-line engine (wet-sleeve),
water-cooled, turbocharged, intercooled
Injection system Direct fuel injection, pump-line-nozzle system
Lubrication Pressurized lube system, deep oil pan for
inclination up to 45-degree
Operating voltage 24 V
Alternator DC / 80 A
Starter 7.8 kW / 11 hp
Batteries 2 x 170 Ah / 12V
Air cleaner Dry-type air cleaner with safety element,
aspirated pre-cleaner with automatic dust
ejector and dash-mounted restriction indicator
Cooling system Water cooler hydrostatically driven and
thermostatically controlled
Travel drive, controlTransmission system Closed-loop hydrostatic travel drive,
each track is driven independently
Travel speed* Infinitely variable
Speed range 1: 0-4.0 km/h / 0-2.48 mph
Speed range 1: (4.8 km/h / 2.9 mph reverse)
Speed range 2: 0-6.5 km/h / 0-4.0 mph
Speed range 1: (7.8 km/h / 4.8 mph reverse)
Speed range 3: 0-11.0 km/h / 0-6.8 mph
* Travel speed ranges can be set with the
programmable control (memory function)
Drawbar pull at 365 kN / 82,026 lb
1.5 km/h / 0.9 mph
Electronic control Electronic engine speed sensing control
automatically adjusts travel speed and drawbar
pull to match changing load conditions
Steering Hydrostatic, infinitely variable track speeds
provide unlimited maneuverability and
optimum control for full power turns and
counterrotation
Service brake Wear-free, hydrostatic (dynamic braking)
Automatic park brake Wear-free, wet multiple-disc brakes
Cooling system Separate oi l cooler, hydrostatically driven and
thermostatically controlled
Filter system Micro cartridge filters
Final drive Heavy-duty combination spur gear with
double-reduction planetary final drives, double
sealed with electronic seal-integrity indicator
Control Single-lever steering allows for full power turns
and counterrotation
UndercarriageL LGP
Mount Via separate pivot shafts and an oscillating
equaliser bar
Chains Sealed and lubricated chains, single-bar
grouser moderate service shoes, track chain
tension via grease tensioner and hydraulic
cylinders
Links 40 each side 44 each side
Track rollers/
carrier rollers 7/2 each side 8/2 each side
Sprocket segments 5 each side 5 each side
Track shoes standard 508 mm/20 812 mm/32
Track shoes optional 560 mm/22 914 mm/36
610 mm/24
710 mm/28
Refill capacitiesFuel tank 535 l (117.7 gallons)
Cooling system 62 l (13.6 gallons)
Engine oil with oil filters 43 l (9.5 gallons)
Splitter box 6.4 l (1.4 gallons)
Hydraulic tank 189 l (41.6 gallons)
Final drive, each 19.5 l (4.3 gallons)
Hydraulic systemSystem type Load Sensing proportional pump flow control
Pump type Swash plate variable displacement piston pump
Pump flow max. 260 l/min / 57.2 gpm
Pressure limitation 260 bar / 3,770 PSI
Control valve 2 segments, expandable to 4
Filter system Return filter with magnetic rod in the hydraulic
tank
Control Single joystick lever for all blade functions
Operators cabCab Resiliently mounted cab with positive pressure
ventilation, can be tilted with the hand pump
40 to the rear. With integral ROPS Rollover
Protective Structure (ISO 3471) and FOPS
Falling Objects Protective Structure (ISO 3449)
Operators seat Fully adjustable, suspended swivel seat
adjustable to operator's weight
Monitoring Combination of LCD and analog instrument
panel
Sound-pressure level LpA (inside cab) = 78 dB(A) 2000/14/EC
LwA (surround noise) = 105 dB(A) 2000/14/EEC
kN
300
365
200
100
0
km/h
400
Drawbarpull
Travel speed
0 1 2 3 4 5 6 7 8 9 10 11
0 1 2 3 4 5 6 7 mph
0
20
40
60
80
100
x 1000 Ib
Drawbar pull PR 744
Usable drawbar pull will depend on traction and weight of tractor
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Dimensions PR 744 L PR 744 LGP
A Height over cab mm 3,434 3,
ft-in 113 113
B Overall length without attachments mm 4,657 4,692
ft-in 153 155
C Distance idler/sprocket centre mm 2,992 3,316
ft-in 910 1011
D Height of grousers mm 71.5 71.5
inch 2.81 2.81
E Track gauge mm 1,980 2,180
ft-in 66 72
F Total width without trunnions (standard shoe width) mm 2,488 2,992
ft-in 82 910
G Total width over blade-mounting trunnions mm 3,000 3,600ft-in 910 1110
H Ground clearance mm 546 546
ft-in 19 19
Tractor shipping weight1 kg 20,920 21,740
lb 46,121 47,9281 Includes coolant, lubricants, 20% fuel, ROPS/FOPS cab and track pads standard
PR 744 Litronic 3
Dimensions
C
B
D
A
H
E GF
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Front attachment
Semi-U blade and Semi-U blade Straight blade
straight blade L LGP
Blade capacity according to ISO 9246 m3 7.2 6.0
yd3 9.4 7.9
A Height of blade mm 1,545 1,320
ft-in 65 44
B Width of blade mm 3,690 4,520
ft-in 144 1410
C Lifting height mm 1,222 1,179
ft-in 410 310
D Depth below ground mm 511 616
ft-in 21 20
E Max. blade pitch 10 10
Max. blade tilt mm 930 933ft-in 34 31
H Overall length mm 6,050 5,935
ft-in 230 196
Operating weight1 kg 24,605 25,570
lb 54,245 56,372
Ground pressure1 kg/cm2 0.81 0.47
PSI 11.52 6.681 Includes coolant, lubricants, full fuel tank, ROPS/FOPS cab, semi-U blade/straight blade, operator and track pads standard
H
B
A
D
E
C
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Front attachment
H
B1
C
ED
H1
G
A
B
F
Mechanical Angle blade
angle blade L
Blade capacity according to ISO 9246 m3 4.90
yd3 6.41
A Height of blade mm 1,200
ft-in 311
B Width of blade mm 4,590
ft-in 151
B1 Transport width mm 4,175
ft-in 138
C Lifting height mm 1,290
ft-in 43
D Depth below ground mm 570
ft-in 110
F Max. blade angle 25
Max. blade tilt mm 735
ft-in 25
G Width over C-frame mm 3,200
ft-in 106
H Overall length, blade straight mm 6,215
ft-in 205
H1 Overall length, blade angled mm 7,105
ft-in 234
Operating weight1 kg 24,805
lb 54,686
Ground pressure1 kg/cm2 0.82
PSI 11.661 Includes coolant, lubricants, full fuel tank, ROPS/FOPS cab, angle blade, operator and track pads standard
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Rear attachment
Ripper Parallelogrammulti-shank
A Ripping depth (max./min.) mm 749 (449)
ft-in 25 (16)
B Lifting height (max./min.) mm 755 (457)
ft-in 26 (16)
C Overall length, mm 1,586
attachment raised ft-in 52
D Overall length, mm 1,937
attachment lowered ft-in 64
E Ripper width mm 2,184
ft-in 72
F Distance between teeth mm 1,000ft-in 33
Weight kg 3,295
lb 7,264
Drawbar Rigid
A Additional length mm 435
ft-in 15
B Socket pin diameter mm 50
inch 2
C Height of jaw mm 521
ft-in 19
D Ground clearance mm 425
ft-in 15
Jaw opening mm 95
ft-in 4
Weight kg 345
lb 780
Ripper Parallelogrammulti-shank with hydraulic
pitch adjustment
A Ripping depth (max./min.) mm 749 (449)
ft-in 25 (16)
B Lifting height (max./min.) mm 759 (459)
ft-in 26 (16)
C Overall length, mm 1,569
attachment raised ft-in 52
D Overall length, mm 1,937
attachment lowered ft-in 64
E Toolbar width mm 2,184
ft-in 72
F Distance between teeth mm 1,000ft-in 33
Max. shank pitch 25
Weight kg 3,305
lb 7,286
B
A
C
D
E
F
FE
F
F
B
A
C
D
D C
A
B
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Equipment
Basic machine S OTow switch
Towing hitch rear
Towing lug front
Forestry equipment
Landfill equipment
Battery compartment, lockable
Filling with environmental-friendly oil
Filling with oil SAE 30
Filling with oil SAE 10
Tank guard, complete
Refuelling pump, electric
Belly pans, heavy-duty
Cold start device, heating coil
Radiator, wide-meshed
Radiator guard, heavy-duty
Radiator guard, hinged
Liebherr diesel engine
Fan, hydraulically driven temp. control
Fan guard
Engine cover, perforated
Engine doors, perforated
Engine doors, hinged, lockable
Lugs for crane lifting
Special paint
Fuel water separator
Fuel water separator with electric
heater
Air filter, dry-type, dual step
Pre-cleaner with automatic dust
ejector
Toolkit
S = Standard, O = Option
Travel drive S OParking brake, automatic
Function control, automatic
Control, single joystick
Load limit control, electronic
Electronic control
Travel control, 3-speed
Hydrostatic travel drive
Inching brake pedal
Emergency stop
Oil cooler
Spure gear with double reduction gear
Safety lever
Undercarriage S OTrack frame, closed
Sprocket segments, bolted
Master link, two-piece
Track shoes with mud hole track pads
Track guide centre part
Tracks oil lubricated
Track guard
Undercarriage, rigid
Track frames, oscillating
Pivot shaft, separate
Sprocket segments with recesses
Electrical S OStarter motor 7.8 kW
Working lights, front, 6 units (halogen)
Working lights, rear, 2 units (halogen)
Batteries, cold start, 2 units (170 Ah)
Battery main switch, mechanical
On-board system 24 V
Alternator 80 A
Back-up alarm
Beacon
Horn
Start lock, electronic
Additional lights, rear
Operators cab S OStorage compartment
Armrest 3D adjustable
Ash tray
Pressurised air filter
Operators seat, 6-way adjustable
Operators seat, air-suspended
Fire extinguisher
Dome light
Coat hook
Air conditioner
FM radio
Radio preinstallation
ROPS/FOPS
Rear mirror, inside
Safety glass, tinted
Windshield, washer system with
intermittent function
Windshield wipers front, rear
Sliding windows, left
Sliding windows, right
Protective grids for windows
Extension, seat back
Sun visor
Socket 12 V
Warm water heating
Instruments indicators S O
Battery charging
Engine-hour meter
Electronic travel control Electronic engine control
Speed range
Cooling water temperature
Cold start Diesel engine
Oil level final drives
Float position blade
Fuel level
Contamination hydraulic filter
Contamination air filter
Engine oil pressure warning lamp
Oil temperature warning lamp
Water contamination fuel system
Hydraulicsystem S O
Hydraulic control ripper
Hydraulic control winch
Variable flow pump, load sensing
Oil filter with strainer in hydraulic tank
Blade quick drop
Control valve for 2 circuits
Float position blade
Hydraulic servo control
Hydraulic tank oil level control
Attachments S OMounting plate for external tools
Drawbar rear, rigid
Drawbar rear, swivelling
Counterweight, rear
Ripper, 3 shanks
Straight blade
Semi-U blade
Angle blade
Winch
Spill plate for blade
Subject to changes.
Options and/or special attachments, supplied byvendors other than Liebherr, are only to beinstalled with the knowledge and approval ofLiebherr to retain warranty.
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Printed in Germany by Eberl RG-BK-RP LWT/VM 10290895-0.3-10.05
The Liebherr Group of Companies
Wide product rangeThe Liebherr Group is one of the largest construction
equipment manufacturers in the world. Liebherrs high-
value products and services enjoy a high reputation in
many other fields, too. The wide range includes domes-
tic appliances, aerospace and transportation systems,
machine tools and maritime cranes.
Exceptional customer benefitEvery product line provides a complete range of models
in many different versions. With both its technical excel-
lence and acknowledged quality, Liebherr-products offer
a maximum of customer benefits in practical application.
State-of-the-art technologyTo provide consistent, top quality products, Liebherr
attaches great importance to each product area, its
components and core technologies. Important modules
and components are developed and manufactured in-
house, for instance the entire drive and control techno-
logy for construction equipment.
Worldwide and independentHans Liebherr founded the Liebherr family company in
1949. Since that time, the enterprise has steadily grown to
a Group of 100 companies with over 22,000 employees
located on all continents. The corporate headquarters of
the Group is Liebherr-International AG in Bulle, Switzerland.
The Liebherr family is the sole owner of the company.
www.liebherr.com
Liebherr-Werk Telfs GmbHHans Liebherr-Strae 35, A-6410 Telfs +43 5262 600-0, Fax +43 5262 600-72www.liebherr.com, E-Mail: [email protected]