Crawler Tractors PR 754 PR 764 - Liebherr Myanmar
Crawler TractorsPR 754 PR 764Engine Output:250 kW / 340 HPOperating Weight: 35,000 – 40,800 kg77,162 – 89,948 lbPR-754-764 BT DIN.indd 1310 kW / 422 HP44,220 – 52,685 kg97,488 – 116,150 lb01.12.11 10:3810:37
2PR 754PR 764Engine Output:250 KW / 340 HPOperating Weight: 35,000 – 40,800 kg77,162 – 89,948 lbBlade Capacity:8.9 – 11.7 m³11.6 – 15.3 yd³Hydrostatic travel drive,electronically controlledEngine Output:310 kW / 422 HPOperating Weight: 44,220 – 52,685 kg97,488 – 116,150 lbBlade Capacity:13.6 – 17.0 m³17.8 – 22.2 yd³Hydrostatic travel drive,electronically controlledPR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 201.12.11 10:3810:37
PerformanceReliabilityPower and innovative technology are features of Liebherr’sgeneration 4 crawler tractors. Their excellent power-toweight ratio stands for maximum productivity in all operating conditions. Whether ripping hard ground, movingmaterial or grading surfaces, the outstanding performanceof the PR 754 and PR 764 never fails to impress.Sturdy and strong: Liebherr crawler tractors and the materials used to build them are designed for long, troublefree life. Components subject to severe loads are madefrom high-strength materials, and points exposed to possible damage are well protected. Liebherr crawler tractorsowe their high levels of availability to these stringent reliability standards.EconomyLiebherr’s economic advantages are undisputed: like allLiebherr machines, the PR 754 and PR 764 save moneyby being so easy to service, with shorter down times andlower maintenance costs. The latest generation of Liebherrdiesel engines combines performance with economy, andwith the machines’ efficient drivetrain, impressive poweris available at minimum fuel consumption.ComfortThe operator of a generation 4 Liebherr crawler tractorworks in a cab of generous size, with controls laid outaccording to the latest ergonomic principles. This welldesigned cab provides an ideal view of the work area andthe working equipment. Intuitive single joystick controlmakes for sensitive and accurate dozer operation.PR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 3301.12.11 10:3810:37
Liebherr diesel engines featuringthe latest technologies: Electronically controlled, the power output and torque curves are designed foroutstanding productivity when pushingor ripping. Environmentally responsible and economical: the engines comply with thelatest exhaust emission limits. An extra-deep oil sump maintainsengine lubrication at slopes ofup to 45 degrees for PR 754 and40 degrees for PR 764.4PR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 401.12.11 10:3810:37
PerformanceLiebherr has successfully been building crawler tractors with hydrostatic transmission for the past thirty years. The latest generation 4 of models are powerfulmachines capable of tackling a wide range of tasks.Outstanding productivityImpressive powerand drawbar pullThe powerful Liebherr diesel engine, combinedwith Liebherr’s innovative driveline, makes amplepower available for every working situation. Thehydrostatic drive requires no gear shifting: enginepower reaches the tracks without interruption,even when turning.Efficient pushingand rippingThanks to the hydrostatic transmission, the operator simply selects the most suitable workingspeed. The system automatically maintains peakengine rpm and power efficiency. Track slip is keptlow and maximum power is continuously transferred to the tracks.Bogie suspensionFor work on uneven or rough surfaces, Liebherroffers different types of bogie undercarriages forincreased traction and pushing power.OutstandingmanoeuvrabilityThe hydrostatic drive is particularly suitable forripping work. The machine can be turned quickly, the rear ripper positioned accurately betweenhard rock layers, and the material broken out withthe necessary force.Blade curvature for toptransport capacityThe blades for the PR 754 and PR 764 have hadtheir penetration and rolling behaviour optimised,to increase their transport capacity.Low centre of gravityThe driveline assemblies are compact so that thecomplete machine has a very low centre of gravity,thereby allowing safe operation on steep slopes.Generous groundclearanceThe well-planned component layout is designedfor maximum ground clearance. Heavy duty belly pans prevent damage when working on roughstone or rock.Liebherr hydrostatic transmissionOscillating roller tracks Automatic speed and torque adjustmentkeeps the engine working at optimalpower as the load changes. When working on uneven surfaces,oscillating bogie undercarriagesincrease the ground contact areaand improve traction. In addition, theresilient mountings effectively absorbshock loads. At low ground speeds, for instanceduring ripping work, the thermal loads onthe hydrostatic travel gear are kept low.The driveline’s high efficiency remainsavailable in all speed ranges. For work on softer, more yieldingsurfaces such as coal or wood chips,tracks with rigid rollers are used.PR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 5501.12.11 10:3810:37
Constant engine speedkeeps fuel consumption lowSpecific fuel consumption [g/kWh] Since the engine’s nominal operating speed is in the region of its lowestspecific fuel consumption, maximumoperating economy is assured.Engine rated speed [1/min]6PR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 601.12.11 10:38
EconomyLiebherr crawler tractors are designed with economy in mind, featuring lowfuel consumption, high productivity, extended component life and minimummaintenance costs.Low fuel consumptionConstant lowengine speedsThe Liebherr diesel engine always operates at aconstant speed – in the most economical rpmrange – regardless of the actual travel speed. Thisavoids unnecessary fuel consumption.A low mean piston speed boosts cylinder fillingand leads to more efficient combustion of the fuelair mixture.Efficient drivelineHydrostatic transmission delivers the best possible level of efficiency over the full speed range.Even when peak power at low ground speed isrequired - e.g. when ripping - the oil temperatureremains low.Load-sensingimplement hydraulicsThis system keeps energy consumption down tothe level needed by the hydraulics at any givenmoment. It saves fuel when the work tools are notbeing operated.Low maintenance costsGood accessibilityAll the diesel engine’s servicing points are groupedtogether centrally, and can be easily reached. Thehydraulic tilt cab makes it even easier to reach thevarious mechanical assemblies for quick, effectiveservicing.Longer maintenanceintervalsMaintenance intervals are optimally matched tothe various components and assemblies. Whereparts are exposed to dirt and dust, for instanceon the pushing frame, maintenance-free bearingsare used.Long-life tracksLarge trackcomponentsHigh-quality components with ample dimensionsprolong the operating life of the undercarriage.Tiltable cabLiebherr Litronic control system For easy, quick access to all drivetrainand hydraulic components. Liebherr’s Litronic control system matches travelspeed ideally to the task at hand.Simple maintenance Track slip is kept to a minimum in pushing as wellas in ripping applications; this improves powertransmission and prolongs track life. All the servicing points are locatedcentrally and are easy to reach,to minimise the time spent on dailyinspection work.PR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 7701.12.11 10:38
The ideal configuration for every task There is a mining version for use on abrasivematerials. Optional wear plates increase machine operating life before components haveto be replaced. Liebherr offers special machine configurationsfor landfill, coal, or woodchip applications, aswell as for low ambient temperatures.8PR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 801.12.11 10:38
ReliabilityWell-proven technologies and high quality are what keeps a machine ready foruse. Liebherr develops and builds its own components and assemblies specifically for use on construction and civil engineering machinery, so that theirstrength can be guaranteed however arduous the task.Liebherr powertrainReliable constructionmachinery enginesLiebherr diesel engines have been developed forthe toughest imaginable operating conditions. A rigid ladder-type frame reduces engine vibration andprovides the strength needed for maximum operating reliability and long service life.Wear-free drivelineconceptA tried and tested system: Liebherr’s hydrostatictravel drive needs no torque converter, manualshift gearbox, differential steering or steeringclutches. The system’s hydraulic pumps and motors are standardised, effectively wear-free in operation and exceptionally reliable.Long-life final drivesOf ample dimensions, Generation 4 final drivesare designed to withstand the most severe loads.Double transmission seals with automatic leak detection enhance reliability even more.Robust steel constructionBox-section main frameThe main frame is of box-section design – a wellproven principle for maximum torsional stiffnessand optimal absorption of forces. Cast steel isused for components subject to high stress.Rear ripperLiebherr rippers are built for heavy-duty tasks,and have extra protection at all areas exposedto wear.Secrets of long-term reliabilityModern cooling systemTwo hydrostatically driven fans and a wide-meshedradiator guarantee optimal cooling performance,even in dusty environments.Protected electricsHigh quality cable protection prevents mechanicaldamage to the cable harness.Component endurance testsModern cooling system Even at the design stage, componentsare subjected to FE analysis in order todetermine their dimensions in relation tothe loads they will encounter. Two electronically controlled fans draw in thevolume of air actually needed to keep thehydraulic fluid and engine oil temperaturesstable as loads vary. All components operatein their most favourable temperature ranges,thus avoiding unnecessary strain and prolonging their trouble-free operating life. All components undergo long-term laboratory and field testing, and only thosethat comply with Liebherr’s high qualitystandards are approved for production. Cooling air is drawn in from clean zonesaround the machine, to keep dust contamination to a minimum. Optional: a reversible fan for automatic radiator cleaning when operating in extremely dirtyor dusty conditions.PR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 9901.12.11 10:38
Intuitive single joystick controlInching brake pedal Fingertip speed control: three travelspeed ranges can be preselected andprogrammed individually by push-button:Initial settings Stage 1: 0 – 2.5 mphStage 2: 0 – 4.0 mphStage 3: 0 – 6.8 mph In addition to the traveljoystick, the operator cancontrol speed via a pedaland apply the brakes ifnecessary. Memory functionEach time the machine is restarted,all existing settings are retained.101 Inching function2 Braking functionPR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 1001.12.11 10:38
ComfortThe operator’s work area has been redesigned for an exceptionally high level ofcomfort and convenience. There is ample space, the controls are laid out ergonomically and the noise level is low. Liebherr cabs provide perfect conditionsfor concentrated work without fatigue. The excellent view makes safe, accurateoperation much easier.Outstanding cab designErgonomicsThe well-planned cab layout makes conditionsideal for stress-free, efficient operation of the machine. All instruments and controls are clearly laidout and within easy reach.Low noise levelsThanks to effective sound insulation and the use ofmodern, quiet-running diesel engines, the PR 754and PR 764 feature exemplary noise levels thatare well below the legal limits.Outstanding viewIntegral ROPS/FOPS protection and large-areacab windows provide the operator with the bestpossible view in every direction.Simple, precise controlSingle joystick controlA single joystick controls all travel movementsconveniently and accurately, including the ’counterrotation’ function.Stepless speed controlGround speed can be selected without gearchanges and therefore with no interruption to thetransmission of power.Safety in every situationEven on steep gradients, the crawler tractor is always positively driven. Since the system cannotfreewheel (hydrostatic transmission), the operatorcontrols braking simply by moving back the traveljoystick. When the machine comes to a halt, theparking brake is applied automatically for additional safety.Well-planned details A big storage compartment is astandard feature, and includesa 12 Volt power socket to supplya cooler. The seat with its wide range ofadjustments and three-positionarmrests helps to provide apleasant work area for the operator.Excellent view ofrear-end attachments ROPS/FOPS protectionis integrated into the cab,with large-area windows Good view of ripper andsurrounding work area Direct view of ripperadjusting pin Many other details, for example a sliding side window, tinted glass and afootrest, add to the operator’s comfortstill further.PR 754 Litronic PR 764 LitronicPR-754-764 BT DIN.indd 111101.12.11 10:38
Basic machineOperator’s cabEnginePR 754PR 764Liebherr diesel engine D 946 L A6D 9508 A7Emission regulations according to 97/68/EC,2004/26/EC Stage IIIA and EPA/CARB Tier 3Rating (ISO 9249)250 kW / 340 HP310 kW / 422 HPRating (SAE J1349)250 kW / 335 HP310 kW / 416 HPRated speed1,600 1/min1,600 1/minDisplacement12 l / 733 in316.2 l / 989 in3Design 6 cylinder in-line-engine8 cylinder V-engine(wet-sleeve) water-cooled, turbocharged,intercooledInjection system Direct fuel injection,Direct fuel injection,pump-line-nozzleCommon Railsystem, electronicsystem, electroniccontrolcontrolLubrication Force-feed lubrication, engine lubricationguaranteed for inclinations up to 45 (PR 754)and 40 (PR 764)Operating voltage24 V24 VAlternator80 A80 AStarter7.8 kW / 11 HP7.8 kW / 11 HPBatteries2 x 225 Ah / 12 V2 x 225 Ah / 12 VAir cleaner Dry-type air cleaner with safety element, aspirated pre-cleaner, service gauge in cabCooling system Combi radiator, comprising a radiator for waterand charge air. Hydrostatic fan driveTravel drive, controlPR 754PR 764Transmission system Infinitely variable hydrostatic travel drive,independent drive for each trackTravel speed* continously variableSpeed 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 customised on the travel joystick (memory function)Drawbar pull at520 kN610 kN1.5 km/h / 0.9 mphElectronic control Electronic engine speed sensing control (loadsensing feature) automatically adjusts travelspeed and drawbar pull to match changingload conditionsSteeringHydrostaticService brakeWear-free, hydrostatic (dynamic braking)Automatic park brake Wear-free, wet multiple-disc brakes, automa tically applied with neutral joystick positionCooling system Separate hydraulic oil cooler, hydrostaticallydriven and thermostatically controlledFilter systemMicro cartridge filters in cooling circuitFinal drive Heavy-duty combination spur gear with planetary gear, double sealed with electronic sealintegrity indicatorControl Single joystick for all travel and steeringmotions, as well as for counterrotationPR 754PR 764Cab Resiliently mounted cab with positive pressureventilation, can be tilted with hand pump40 to the rear. With integrated ROPS RolloverProtective Structure (EN ISO 3471) andFOPS Falling Objects Protective Structure(EN ISO 3449)Operator’s seat Comfort seat, adjustable to operator’s weightMonitoring Combined analogue / LC display, automaticmonitoring of abnormal operating conditionsUndercarriagePR 754PR 764DesignUndercarriage with rigid or bogie suspensionMount Via separate pivot shafts and an oscillatingequaliser barChains Lubricated single-bar grouser shoes ESS*,track chain tensioning via steel spring andgrease tensionerLinks, each side4444Track rollers/carrierrollers7/2 each side7/2 each sideSprocket segments5 each side3 each sideTrack shoes standard560 mm / 22” ESS610 mm / 24” ESSTrack shoes optional610 mm / 24” ESS660 mm / 26” ESS660 mm / 26” ESS710 mm / 28” ESS710 mm / 28” ESS760 mm / 30” ESS* ESS Extreme Service ShoesHydraulic systemPR 754PR 764System typeLoad Sensing proportional pump flow controlPump typeSwash plate variable displacement piston pumpPump flow max.261 l/min / 57.4 gpm352 l/min / 77.9 gpmPressure limitation260 bar / 3,770 PSI260 bar / 3,770 PSIControl valve2 segments, expandable to 4Filter system Return filter with magnetic rod in the hydraulictankControl Single joystick for all blade functionsDrawbar pull PR 754/PR 764Noise emissionsOperator sound exposureISO 6396Exterior sound pressure2000/14/ECPR 754PR 764LpA 78 dB(A)LpA 79 dB(A)emission at the operator’s positionLwA 113 dB(A)LwA 114 dB(A)emission in the environmentUsable drawbar pull will depend on traction and weight of tractor12PR 754 Litronic PR 764 LitronicNTB PR754-764 T enGB 04.indd 1230.11.11 12:51
Basic machineRefill capacities in lmp. gallonsFuel tankCooling systemEngine oil with oil filtersSplitter boxHydraulic tankFinal drive, eachPR 754650 l (143.0 gallons)74 l(16.3 gallons)43 l(9.5 gallons)5.5 l(1.2 gallons)215 l(47.3 gallons)18.5 l(4.1 gallons)PR 764860 l (189.2 gallons)85 l(18.7 gallons)70 l(15.4 gallons)6.4 l(1.4 gallons)281 l(61.8 gallons)22.5 l(4.9 gallons)DimensionsDimensionsPR 754PR 764RigidSingle bogieRigidSingle nDouble linkbogiesuspensionA Height over cabB Overall length without attachmentsC Distance idler/sprocket centerD Height of grousersE Track gaugeF Total width over tracksG Total width over blade-mountingtrunnionsH Ground clearanceTractor shipping weight 1mm3,6303,935ft in11’11”12’11”mm4,8755,280ft in16’0”17’4”mm3,1743,540ft ,240ft in7’2”7’4”mm2,7492,850ft in9’0”9’4”mm3,1453,263ft in10’4”10’8”mm630695ft lb63,81765,79082,75583,85784,7391 Includes coolant, lubricants, 20% fuel, ROPS/FOPS cab and track shoes 560 mm/22” for PR 754, track shoes 610 mm/24” for PR 764. NTB PR754-764 T enGB 04.indd 13PR 754 Litronic PR 764 Litronic1330.11.11 12:51
Front attachmentSemi-U bladePR 754PR 764RigidSingle bogieRigidSingle nBlade capacity according tom38.913.6ISO 9246yd311.6417.79A Height of blademm1,6501,950ft in5’5”6’5”B Width of blademm4,0304,370ft in13’3”14’4”C Lifting heightmm1,4001,480ft in4’7”4’10”D Depth below groundmm570647ft in1’10”2’1”E Max. blade pitch10 9.4 Max. blade tiltmm9721,028ft in3’2”3’4”H Overall lengthmm6,4487,022ft in21’2”23’Operating weight1 with trackkg34,99035,885––shoes 560 mm / 22”lb77,14079,113Ground pressure1 with trackkg/cm20.981.01––shoes 560 mm / 22”PSI13.9414.36Operating weight1 with trackkg35,22536,12044,72045,220shoes 610 mm / 24”lb77,65879,63198,59199,693Ground pressure1 with trackkg/cm20.910.931.041.05shoes 610 mm / 24”PSI12.9413.2214.7914.93Operating weight1 with trackkg35,69536,59045,40045,900shoes 710 mm / 28”lb78,69480,667100,090101,192Ground pressure1 with trackkg/cm20.790.810.900.91shoes 710 mm / 28”PSI11.2311.5212.8112.94Operating weight1 with trackkg45,68046,180shoes 760 mm / 30”lb100,707101,809Ground pressure1 with trackkg/cm20.850.86shoes 760 mm / 30”PSI12.0912.231 Includes coolant, lubricants, 20% fuel, ROPS/FOPS cab, semi-U blade, operator14Double 300102,0740.9213.0846,580102,6910.8712.37PR 754 Litronic PR 764 LitronicNTB PR754-764 T enGB 04.indd 1430.11.11 12:51
Front attachmentU blade *PR 754PR 764RigidSingle bogieRigidSingle nBlade capacity according tom311.717.0ISO 9246yd315.322.23A Height of blademm1,6501,950ft
PR 754 Litronic PR 764 Litronic Reliability Sturdy and strong: Liebherr crawler tractors and the ma - terials used to build them are designed for long, trouble-free life. Components subject to severe loads are made from high-strength materials, and points exposed to pos - sible damage are well protected. Liebherr crawler tractors
3461 Eagle Point Elementary 754 323-5500 754 323-5540 Ms. Christine de Zayas-Fernandez 100 Indian Trace, Weston 33326 3441 Eagle Ridge Elementary 754 322-6300 754 322-6340 Ms. Marina Rashid 11500 Westview Drive, Coral Springs 33067 3191 Embassy Creek Elementary 754 323-5550 754 323-5590
Vallecito Union School District 795-8500 Alternative Schools Calaveras River Academy 754-1996 Community Day School 754-2316 or 754-2123 Community School at Oakendell 754-1961 Home Fires Home-School Support 650-365-9425 Mountain Oaks Charter School/ Home Study Program 754-0532 John Vierra Independent Study High School 736-2507
Mark Twain Union Elementary School District 736-1855 Vallecito Union School District 795-8500 Alternative Schools Angels Creek High School 754-1996 Calaveras River Academy 754-1996 Community Day School 754-2316 or 754-2123 Community School at Oakendell 754-1961 Home Fires Home-School Support 650-365-9425
1 School Phone Number: 754 323 6250 Fax Number: 754 323 6290 Attendance Line: 754 323 6252 Keep your contact info up to date in the front office to receive
Welcome to Branson Tractors and the 20 Series Branson designed their 20 SERIES tractors with rugged, dependability in mind. The company is owned by Kukje Manufacturing of South Korea, a leader in the field of agricultural equipment with over 50 years experience in design, development and manufacture of tractors and other heavy duty agricultural equipment. The tractors are shipped to the United .
Application: Excavators Product Definition Image Crawler Excavators A Crawler Excavator is a self-propelled crawler mounted on heavy equipment that is designed to dig or move large objects and is classified by its mode of locomotion. The main function of a Crawler Excavator is to dig holes or trenches for construction related activities.
hydraulic jack force on the track-adjusting bearing block. Crawler drive: Independent hydraulic propel drive is built into each crawler side frame. Each drive consists of a hydraulic motor propelling a driving tumbler through a planetary gear box. Hydraulic motor and gear box are built into the crawler side frame within the shoe width.
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