Liebherr PR 754 Litronic - Manual (Page 12)

12 PR 754 Litronic PR 764 Litronic
Basic machine
Engine
PR 754 PR 764
Liebherr diesel engine D 946 L A6 D 9508 A7
Emission regulations according to 97/68/EC,
2004/26/EC Stage IIIA and EPA/CARB Tier 3
Rating (SAE J1349) 250 kW / 335 HP 310 kW / 416 HP
Rating (ISO 9249) 250 kW / 340 HP 310 kW / 422 HP
Rated speed 1,600 1 /min 1,600 1 /min
Displacement 12 l / 733 in 3 16.2 l / 989 in 3
Design 6 cylinder in-line-engine 8 cylinder V-engine
(wet-sleeve) water-cooled, turbocharged,
intercooled
Injection system Direct fuel injection, Direct fuel injection,
pump-line-nozzle Common Rail
system, electronic system, electronic
control control
Lubrication Force-feed lubrication, engine lubrication
guaranteed for inclinations up to 45° (PR 754)
and 40° (PR 764)
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 225 Ah / 12 V 2 x 225 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
and charge air. Hydrostatic fan drive
Travel drive, control
PR 754 PR 764
Transmission system Infinitely variable hydrostatic travel drive,
independent drive for each track
Travel speed* continuously variable
Speed range 1 (reverse) 0– 4.0 km/h / 2.5 mph (4.8 km/h / 2.9 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 custo-
mized on the travel joystick (memory function)
Drawbar pull at 520 kN 610 kN
1.5 km/h / 0.9 mph 116,901 lbf 137,134 lbf
Electronic control Electronic engine speed sensing control (load
sensing feature) automatically adjusts travel
speed and drawbar pull to match changing
load conditions
Steering Hydrostatic
Service brake Wear-free, hydrostatic (dynamic braking)
Automatic park brake Wear-free, wet multiple-disc brakes, automa-
tically applied with neutral joystick position
Cooling system Separate hydraulic oil cooler, hydrostatically
driven and thermostatically controlled
Filter system Micro cartridge filters in cooling circuit
Final drive Heavy-duty combination spur gear with plane-
tary final gear, double sealed with electronic
seal-integrity indicator
Control Single joystick for all travel and steering
motions, as well as for counter rotation
Operator’s cab
PR 754 PR 764
Cab Resiliently mounted cab with positive pressure
ventilation, can be tilted with hand pump 40°
to the rear. With integrated ROPS Rollover Pro-
tective Structure (EN ISO 3471) and FOPS Fal-
ling Objects Protective Structure (EN ISO 3449)
Operator’s seat Comfort seat, adjustable to operator’s weight
Monitoring Combined analog / LC display, automatic
monitoring of abnormal operating conditions
Undercarriage
PR 754 PR 764
Design Undercarriage with rigid or bogie suspension
Mount Via separate pivot shafts and an oscillating
equalizer bar
Chains Lubricated single-bar grouser shoes SESS*,
track chain tensioning via steel spring and
grease tensioner
Links, each side 44 44
Track rollers/carrier
rollers 7/2 each side 7/2 each side
Sprocket segments 5 each side 3 each side
Track shoes standard 560 mm / 22” SESS 610 mm / 24” SESS
Track shoes optional 610 mm / 24” SESS 660 mm / 26” SESS
660 mm / 26” SESS 710 mm / 28” SESS
710 mm / 28” SESS 760 mm / 30” SESS
Noise emissions
PR 754 PR 764
Operator sound exposure L
pA
= 78 dB(A) L
pA
= 79 dB(A)
ISO 6396 emission at the operator’s position
Exterior sound pressure L
wA
= 113 dB(A) L
wA
= 114 dB(A)
2000/14/EC emission in the environment
Drawbar pull PR 754/PR 764
Usable drawbar pull will depend on traction and weight of tractor
* SESS Super Extreme Service Shoes
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