Liebherr PR 744 Litronic - Manual (Page 12)

12 PR 734 Litronic PR 744 Litronic
Basic machine
Engine
PR 734 PR 744
Liebherr Diesel engine D 936-L A6 D 936-L A6
Emission regulations according to 97/68/EC,
2004/26/EC stage IIIA and EPA/CARB Tier 3
Rating (ISO 9249) 150 kW / 204 HP 185 kW / 252 HP
Rating (SAE J1349) 150 kW / 201 HP 185 kW / 248 HP
Rated speed 1,800 rpm 1,600 rpm
Displacement 10.5 l / 641 in 3 10.5 l / 641 in 3
Design 6 cylinder in-line engine, water-cooled.
Turbocharged, intercooled
Injection system Direct fuel injection, pump-line-nozzle system,
electronic control
Lubrication Force-feed lubrication, engine lubrication in an
inclined position up to 45°, on all sides
Operating voltage 24 V 24 V
Alternator 80 A 80 A
Starter 7.8 kW / 11 HP 7.8 kW / 11 HP
Batteries 2 x 170 Ah / 12 V 2 x 170 Ah / 12 V
Air cleaner Dry-type air cleaner with safety element,
aspirated pre-cleaner, service gauge in cab
Cooling system Combi radiator, comprising a radiator for water,
hydraulic fluid (PR 734), charge air, fuel.
Hydrostatic fan drive
Travel drive, control
PR 734 PR 744
Transmission system Infinitely variable hydrostatic travel drive,
independent drive for each frame
Travel speed * continuously variable
Speed range 1 (reverse): 0 - 4.0 km/h / 2.5 mph (4.8 km/h / 3.0 mph)
Speed range 2 (reverse): 0 - 6.5 km/h / 4.0 mph (7.8 km/h / 4.8 mph)
Speed range 3 (reverse): 0 -11.0 km/h / 6.8 mph (11.0 km/h / 6.8 mph)
* Pre-adjusted, all speed ranges can be
customized on the travel joystick
Drawbar pull at
1.5 km/h / 0.9 mph
274 kN 365 kN
Electronic control Electronic engine speed sensing control auto-
matically adjusts travel speed and drawbar pull
to match changing load conditions
Steering Hydrostatic
Service brake Wear-free, hydrostatic (dynamic braking)
Automatic park brake Wet multiple-disc brakes, wear-free, auto-
matically applied with neutral joystick position
Cooling system Hydraulic oil cooler, inte- Separate oil cooler
grated in combi radiator
Filter system Micro cartridge filters
Final drive Heavy-duty combination spur gear with
planetary final drives, double sealed with
electronic seal-integrity indicator
Control Single joystick for all travel and steering
functions
Operator’s cab
PR 734 PR 744
Cab Resiliently mounted cab with positive pressure
ventilation, can be tilted with hand pump 40°
to the rear. With ROPS Rollover Protective
Structure (ISO 3471) and FOPS Falling Objects
Protective Structure (ISO 3449) integrated
Operator’s seat Fully adjustable suspended seat
Monitoring Combined analog / LC display, automatic
monitoring, display if abnormal operating
conditions
Drawbar pull PR 734/PR 744
Undercarriage
PR 734 PR 744
L XL LGP L LGP
Mount Via separate pivot shafts and an oscillating
equalizer bar
Chains Sealed and lubricated chains, single-bar
grouser pads, track chain tension via grease
tensioner and hydraulic cylinders
Links 40 44 44 40 44
Track rollers/carrier rollers 7/2 8/2 8/2 7/2 8/2
Sprocket segments 5 5 5 5 5
Track pads standard 508 mm 508 mm 812 mm 508 mm 812 mm
20” 20” 32” 20” 32”
Track pads optional 560 mm 560 mm 914 mm 560 mm 914 mm
610 mm 610 mm 965 mm 610 mm
710 mm
22”, 24” 22”, 24” 36”, 38” 22”, 24” 36”
28”
Usable drawbar pull will depend on traction and weight of tractor
Noise emissions
PR 734 PR 744
Operator sound exposure L
pA
= 78 dB(A) L
pA
= 78 dB(A)
ISO 6396 (emission at the operator’s position)
Exterior sound pressure L
wA
= 111 dB(A) L
wA
= 112 dB(A)
2000/14/EC (emission in the environment)
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