®®

Global VersionCat® 3176C DITA ATAAC

Variable Horsepower Arrangement, Net- gears 1-3 123 kW 165 hp- gears 4-8 138 kW 185 hp

Variable Horsepower Plus Arrangement, Net- gears 1-3 123 kW 165 hp- gears 4-6 128 kW 185 hp- gears 7-8 153 kW 205 hp

WeightsGross Vehicle Weight - base 15 270 kg 33,670 lb

front wheels 4305 kg 9493 lbrear wheels 10 965 kg 24,177 lb

MoldboardBlade Width 3658 mm 12 ft

143HMotor Grader

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143H Motor GraderThe 143H blends productivity and durability to give you the best return on your investment.

Caterpillar has matched and balanced allpower train components, hydraulic systems,and structural elements to deliver a superiormotor grader. Include the best operatorstation in the industry and world-classdealer support, and the Cat 143H representsa reliable, cost-effective investment.

All-Wheel Drive System

All-wheel drive improves tractiveperformance in poor underfoot conditions.The Variable Horsepower feature comesstandard on the 143H. With threeoperating modes — automatic,manual, and off — the operator canmatch performance to any application.pg. 12

Operator’s Station

Low effort blade controls, electronicthrottle control, EMS III monitoringsystem, and improved ventilationprovide world-class operator controland comfort. Improved visibility tothe front and rear increase operatorconfidence and productivity. pg. 10

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Hydraulics

The load-sensing hydraulic systemlowers power consumption and systemheat. The advanced PPPC control valvesprovide low lever effort, balanced flow,and consistent cylinder speeds foroutstanding blade control. Blade floatis incorporated into the blade lift valves.pg. 6

Power Train

The power shift transmission takes fulladvantage of the powerful 3176C DITAATAAC engine. Variable Horsepoweruses specific torque curves for eachgear range for optimum performance.Dual air system and multi-disc oilbrakes assure reliable braking control.pg. 5

Engine

The Cat 3176C DITA ATAAC isdesigned to handle the tough loads.Variable Horsepower matchestorque curves to the gear to maximizeresponse, power, and efficiency. Lowfuel consumption reduces operatingcosts and reduces environmentalimpact. pg. 4

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✔ New Feature

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Customer Support

Your Cat dealer offers a range ofservices that help you operate longerwith lower costs. pg. 14

Environmentally Responsible Design

New engine arrangements and operatorstation designs reduce emissions andmeet current and anticipated regulationsfor interior and exterior sound levels,emissions, and exhaust. pg. 13

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Serviceability

Inspection and service points have beengrouped into a convenient left-hand side,ground level “service center.” Groundlevel fueling and extended engine andhydraulic oil change intervals helpminimize downtime. pg. 9

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Structures

The 143H frame is designed and built toexceed the expectations of the customer.pg. 8

Drawbar, Circle, Moldboard

Flexible moldboard positioning anda long wheelbase improve materialhandling. Rugged construction andreplaceable wear parts minimizeoperation costs. pg. 7

Cat 3176C ATAAC Engine. The innovativeCat 3176C diesel engine delivers large-engine performance from a compactengine design. The six-cylinder engineis turbocharged and air-to-air aftercooled.With high displacement and low ratedspeed, this engine provides excellentfuel economy and durability that cansignificantly reduce operating costs.

Variable Horsepower (VHP) and VHPPlus. Automatically increases horsepowerin higher gears when the machine canuse it. In lower gears where tractionis limited, horsepower is limited,reducing wheel slip and conservingfuel. In applications such as snowremoval, this power allows highertravel speeds and faster snow removalfor more snow clearing in less time.Also, the higher rimpull in all gears

maximizes performance during high-speed winging and heavy snow loadapplications.

• The 143H has a VHP Plus optionto provide additional horsepowerin forward gears 7-8.

Lugging Performance. High torqueoutput and torque rise make the 3176Cvery responsive. Its superior luggingmaintains consistent grading speedswithout the need to downshift.

Fuel Efficiency. Caterpillar® state-of-the-art electronically controlled, unitinjection fuel system uses high injectionpressures for complete fuel combustion,efficient fuel use, and reduced emissions.The dual-filter system reducescomponent wear.

Turbocharged and Air-To-AirAftercooled. Turbocharger packsmore dense air into the cylinders formore complete combustion and loweremissions, improving performanceand engine efficiency. These benefitsare especially useful at high altitudes.Air-to-air aftercooler reduces smokeand emissions by providing cooler inletair for more efficient combustion. Thisalso extends the life of the piston ringsand bore.

Extended Engine Life. The large bore-stroke design and conservative powerrating minimize internal stresses andincrease component life. The lowengine speeds reduce engine wearand sound levels.

Hydraulic Demand Fan. The hydraulicdemand fan control automaticallyadjusts cooling fan speed accordingto engine cooling requirements. Thissystem reduces demands on the engine,putting more power to the ground andimproving fuel efficiency.

Caterpillar Engine Oil. It is formulatedto optimize engine life and performanceand is strongly recommended for usein Cat diesel engines. The engine oilchange interval is increased to 500 hours.

Improved Torque. Power curvescustomized for the 143H increasepeak torque for higher ground speedsand enhanced productivity. Rimpullhas been increased in all gears forgreater productivity.

Emissions Compliant. The new 143Hhas reduced NOx, hydrocarbon, andparticulate emissions. The Cat 3176Cmeets or exceeds all U.S. EPA Tier 2and EU Stage II emissions controlstandards worldwide.

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EngineCaterpillar engines deliver increased performance and lower operating costs.

Power Shift Transmission. Designedand built specifically for Cat motorgraders, the rugged transmissionprovides on-the-go, full-power shifting,as well as inching capability.

Direct Drive. Delivers superior fuelefficiency and “feel” of blade loads,material hardness, and ground speed.

Gear Selection. Eight forward and sixreverse speeds offer a wide operatingrange for maximum flexibility. Fourgears below 10.3 km/h (6.4 mph) matchworking speed to job conditions formaximum productivity in earthmovingjobs. Gears five, six, and seven areoptimal for efficient snow removaloperations. Gear eight is designedfor roading.

Electronic Transmission Control.Produces easy, smooth shifts to maintainuniform surfaces during shifting andextends transmission life by reducingstress on transmission clutches. A singlelever controls direction, gear, and theparking brake.

Electronic Clutch Pressure Control.ECPC smoothes shifts and improvesinching control, which increases operatorcomfort and productivity. It uses inputfrom the transmission and operatorcontrols to modulate the directionalclutches and produce consistent shifting.

Electronic Overspeed Protection.The transmission control upshiftsthe transmission to relieve overspeedconditions. The transmission controlwill also prevent a downshift untilmachine speed is within the range forthe requested gear. This can preventdamage and reduce component wear.

Inching Pedal. Delivers precise controlof machine movements in any gear withlow pedal effort and excellent modulation,which is critical in close-quarter workor finish grading. A new pedal designand location improves modulation andoperator comfort.

Optional Autoshift. Improves ease ofoperation and maximizes productivityby automatically shifting the transmissionat optimal shift points.

Dual Certified Air Tanks. Supply brakingcapacity to each side of the machine.This system ensures secondary brakingcapability in the event a failure occursin a single brake line. The dual airsystem also has a large reserve forstalled-engine braking.

Brakes. Caterpillar multi-disc brakesoffer a large surface area for dependable,extended-life braking. The air-actuatedservice brakes, located in each of thefour wheel spindle housings, are sealed,adjustment free, and lubricated andcooled by tandem housing oil. Theparking/emergency brakes, located inthe transmission on the output shaft, arespring actuated and air pressure released.When engaged, they neutralize thetransmission and lock the wheels onany surface.

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Power TrainMatched Caterpillar components deliver smooth, responsive performance and reliability.

Load Sensing Hydraulics. A loadsensing variable displacement pumpand the advanced proportional prioritypressure-compensating (PPPC, or“triple-PC”) hydraulic valves providesuperior implement control and enhancedmachine performance and efficiency.Continuously matching hydraulic flowand pressure to power demands createsless heat and reduces power consumption.

Implement Control Valves. PPPC valveshave different flow rates for the head androd ends of the cylinder. This ensuresconsistent extension and retractionproperties for each cylinder and improvesoperator “feel” and system response,ultimately reducing operator fatigue.All control valves use lock valves tomaintain blade settings. Line relief valvesprotect cylinders from excessive pressure.

Balanced Flow. Hydraulic flow isproportioned to ensure all implementsoperate simultaneously. If demandexceeds pump capacity, all cylindersare reduced by the same ratio. Theresult is improved productivity invirtually any application.

Blade Float. Blade float, incorporatedinto the blade lift control valves, allowsthe blade to move freely under its ownweight. By floating both cylinders, theblade can follow the contours of theroad when removing snow. Floatingonly one cylinder permits the toe ofthe blade to follow a hard surface whilethe operator controls the slope with theother lift cylinder.

Independent Oil Supply. Large separatehydraulic oil supply prevents cross-contamination and provides proper oilcooling, which reduces heat build-upand extends component life.

Heavy Duty XT™ Hose. Caterpillar hosetechnology allows high pressures formaximum power and reduced downtime,and intelligent routing minimizesexposure to damage.

Optional Hydraulic Lockout.Mechanically locks all moldboard,machine, and attachment controllevers during machine roading.This prevents implements from beingaccidentally engaged when the motorgrader is travelling down the road.

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HydraulicsBalanced hydraulics deliver consistent, precise, and responsive control.

1 Lock valve; 2 Line relief valve; 3 Blade float detent

Blade. Heat treated moldboard rails,through-hardened, curved DH-2steel cutting edge and end bits, andreplaceable metallic wear insertsassure a long, reliable service life.Three sideshift mounting locations forthe optional moldboard add flexibility.

Blade Positioning. The blade linkagedesign provides extensive moldboardpositioning, most beneficial in mid-range bank sloping and in ditch cuttingand cleaning.

Blade Angle. A long wheelbase allowsthe operator to obtain an aggressivemoldboard angle. This aggressive anglepermits material to roll more freelyalong the blade, which reduces powerrequirements. This is particularly helpfulin handling very dry materials, cohesivesoils, snow, and ice.

Circle Construction. One-piece forgedcircle with hydraulically driven motorstands up to high stress loads. Raisedwear surfaces prevent circle teeth wearagainst the drawbar. Sixty-four uniformlyspaced teeth on the front 240° of thecircle are flame cut and heat inductionhardened to resist wear. And the circle,with 360° rotation, is secured to thedrawbar by six vertically and horizontallyadjustable shoes for maximum support.

Replaceable Wear Items. Tough,durable nylon composite wear insertsare located between the drawbar andcircle, and between the support shoesand circle. This sacrificial wear systemhelps keep components tight for finegrading and allows easy replacement.These inserts reduce rotational friction,resulting in extended component life.

Circle Drive Slip Clutch. This standardfeature protects the drawbar, circle,and moldboard components fromshock loads when the blade encountersimmovable objects. It also reduces thepossibility of the grader making abruptdirectional changes in poor tractionconditions.

Drawbar Construction. The Y-framedrawbar is constructed of two solidbeams for high strength and optimumdurability, as well as precise bladingcontrol. And the yoke plate completelycovers the top of the circle.

Blade Lift Accumulators. These optionalblade lift accumulators absorb verticalshocks encountered when the moldboardcontacts immovable objects. This optionis especially useful in rough gradingand rocky areas.

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Drawbar, Circle, MoldboardEvery component is designed for maximum productivity and durability.

Integrated Bumper. The integratedbumper ties the rear frame togetherinto a cohesive unit to provide a solidplatform for the new 3176C powertrain. This is especially important inripping or snow removal applicationswhere graders are equipped with snowwing attachments.

Rear Frame. Rear frame has two box-sectioned channels integral with a fullywelded differential case for a solidworking platform.

Front Frame. Continuous top and bottomplate construction provides consistencyand strength. The flanged box sectiondesign removes welds from highstress areas, improving reliabilityand durability, and increasing resalevalues for the customer.

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StructuresThe 143H frame is designed and built to exceed the expectations of the customer.

1 Integrated bumper; 2 Box-sectioned channels; 3 Fully welded differential

Service Center. A “Service Center”on the left-hand side provides easy,centralized access to most check andmaintenance points. Routine inspectionand service are faster and easier,providing better machine availabilityand lower operating costs.

• Large hinged doors provide easyaccess to the adjacent engine andmaintenance service compartments.

• Engine and hydraulic oil checkpoints,coolant gauges, and air filters

• Spin-on filters for oils, fuel, andcoolant

• Remote lubrication points, purgevalves, and ecology drain lines

• Fuse panel with new automotivestyle fuses located inside cab

• Tandem oil checkpoint is convenientlylocated between the wheels in thecenter of the tandem.

• Sample ports for engine, hydraulicand transmission fluids, coolant,and fuel encourage preventivemaintenance and diagnosticslike the S•O•S program.

Fuel Tank. The 397 L (105-gallon)ground-level fuel tank allows longerwork shifts and reduces refuelingfrequency. An easily accessiblefuel tank sediment drain enablesthe operator to remove sedimentaccumulation, reducing the riskof fuel system damage.

Extended Oil Change Interval. Operatea full 500 hours between engine oiland filter changes, 4000 hours betweenhydraulic oil changes, and 6000 hoursbetween engine coolant changes. Thisreduces downtime and operating expense.

Cat XT Hose. Caterpillar XT hosetechnology allows high pressures formaximum power and reduced downtime.Hoses are securely routed to minimizeexposure to damage.

O-Ring Face Seals. Cat O-ring faceseals assure rock-solid connections thatmaintain pressure and reduce oil leaks.Intelligent hose routing minimizesexposure to damage, increasing hoselife and enhancing reliability.

Radiator Cleanout Access. Radiatorclean-out access gives the operator theability to clear away debris and othermaterials that build up around theradiator. This ensures that the radiatorfunctions properly, keeping the enginecool and increasing component life.

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ServiceabilityRe-engineered inspection and service points save time and expense.

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The 143H includes innovative changes to improve operator efficiency and, in turn, providegreater machine productivity.

Operator’s Station

Comfort and Convenience. Comfortand convenience are designed intoevery feature of the operator’s station.

Autoshift Transmission. Improvesease of operation and maximizesproductivity by automatically shiftingthe transmission at optimal shift points.

Optimized Inching Modulation. The newElectronic Clutch Pressure Control(ECPC) optimizes inching modulationand smoothes shifting. It also eliminatescable control, improving reliability, andenhances cold oil characteristics.

All-Wheel Drive. Using the rockerswitch on the transmission console, theoperator can choose from three operatingmodes — automatic, manual, or off.The torque control lever allows theoperator to control the aggressiveness ofthe front wheels in both active modes.

Electronic Throttle Control. ETC provideseasier, more precise, more consistentthrottle operation. Two modes on asingle switch offer flexibility for varyingapplications and operator preference.Like cruise control, ETC improvesfuel efficiency.

Electronic Monitoring System. Powerfulmonitoring and diagnostic capabilitiesallow more efficient and safer machineoperation. The Cat EMS III keepsoperators better informed of machinestatus with:

• Continuous tracking of all criticalmachine parameters on a dash display

• Warnings/alerts for abnormalconditions

• Retrieval or adjustment of over200 vehicle system parameters usingthe powerful Cat ET service tool

Controls on Steering Console. Controlsand switches are located on the steeringconsole, shift console, and right cabpost, all within easy reach. Gauges arelocated inside the cab, directly in frontof the operator.

Backlit Controls. Rocker switchesand transmission shifter are backlitfor nighttime operation.

Optional Air Conditioner/Heater.The optional heater and air conditionerarrangements help create a comfortablework environment. The high-capacitysystems dehumidify air and pressurizethe cab, while circulating fresh air andsealing out dust. Multiple additional ventsevenly distribute air throughout the cabfor clear windows and operator comfort.

Exceptional Visibility. A redesignedoperator’s console improves forwardvisibility. Large side windows allowa clear view of the moldboard heeland tandem tires. A wide rear windowand tapered engine hood provide agood view to the rear of the machine.Moving the air dryer and air cleaner,and aligning the precleaner and muffler,improves visibility to the rear of themachine. Operators can work moreconfidently and efficiently.

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Constant Net Horsepower. This exclusivesystem increases horsepower in all gearswhen all-wheel drive is engaged. Theadditional horsepower compensates forpower redirected to hydraulic pumpsand front motors. The system deliversa smooth constant net horsepower inall gears, delivering more power tothe ground.

Superior Traction. All-wheel driveimproves tractive performance in poorunderfoot conditions such as snow, mud,and sand. This feature also providesexcellent steering and sidedraft control.

More Power. The Variable Horsepowerfeature is standard on the 143H. Whenall-wheel drive is engaged, VariableHorsepower kicks in and deliversmaximum power in all gears via anelectronically controlled variabledisplacement piston pump drivendirectly from the transmission.

Wide Working Range. All-wheel isdrive available in gears 1-7 forwardand 1-5 reverse, making it effectivein both low-speed and high-speedapplications — from ditch cutting tosnow winging. Electronically controlleddual displacement wheel motors deliverhigh displacement in gears 1-4 forwardand 1-3 reverse, and low displacementin gears 5-7 forward and 4-5 reverse.Front wheels freewheel in 8 forwardand 6 reverse.

Three Operating Modes. Three operatingmodes are available — automatic, manual,or off. The operator selects the operatingmode using a rocker switch on thetransmission console.

• Automatic mode makes the all-wheel drive feature easy to use.It automatically increases torque tothe front wheels as rear wheel slipincreases. The operator controls theresponsiveness of the front wheelby adjusting the torque control lever.The farther forward the lever, themore rapidly front wheel torque willincrease as slip increases. This modeprovides power to the front wheelsonly when needed, which reduceshydraulic system heat and lowerspower consumption. It also allowsthe operator to focus all his attentionon his work.

• Manual mode gives the operator100 percent control. He adjusts thetorque control lever to set a constanttorque level to the front wheels. Hecan make torque setting adjustmentsas operating conditions change.There are many situations wherean operator may want to controlthe front wheels independent ofrear wheel slip such as when tryingto remove a machine from a snowdrift; when making a tight turn onsnow, mud, or sand; or when workingon a side slope.

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All-Wheel Drive SystemAll-wheel drive keeps productivity high, even in poor underfoot conditions.

Quiet Cab. The resiliently mountedengine and transmission reduce interiorengine noise and vibration to less than81 dB(A), measured according toISO 6394. With the sound suppressiongroup, interior sound levels do notexceed 72 dB(A), measured accordingto ISO 6394. Lower interior noise levelsimprove operator working conditions.

Quiet Machine. Exterior sound levelsare under 110 dB(A), measuredaccording to ISO 6395. The soundsuppression group lowers exteriorsound levels below 107 dB(A),complying with the EU 2000/14/EC.This quiet operation lets the 143Hwork with minimal disturbance tothe surroundings.

Low Emissions. The 143H MotorGrader is even more environmentallyfriendly than its predecessors withreductions in NOx, hydrocarbon, andparticulate emissions. It complies withall U.S. EPA Tier 2 and EU Stage IIemissions control standards worldwide.

Fuel Efficient. Caterpillar state-of-the-artelectronically controlled, unit injectionfuel system has high injection pressurefor complete fuel combustion, increasedfuel efficiency, and reduced emissions.

Dry Machine. Lubricant fill points andfilters are designed to minimize spillage.O-ring face seals, Cat XT hose, andCat hydraulic cylinders protectagainst leaks.

Extended Oil Change Interval. Operatea full 500 hours between engine oil andfilter changes, and 4000 hours betweenhydraulic oil changes. This reducesmachine downtime and operatingexpense, and helps preserve ournatural resources.

Ecology Drains. Make regularmaintenance easier and help preventspills when changing fluids.

Ozone Protection. To help protect theearth’s ozone layer, air-conditioningunits use a refrigerant free ofchlorofluorocarbons (CFCs).

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Environmentally Responsible DesignCaterpillar builds machines that help you create a better world.

Product Support. You will find nearlyall parts at our dealer parts counter.Cat dealers use a worldwide computernetwork to find in-stock parts to minimizemachine downtime. Save money withgenuine Cat Reman parts. You receivethe same warranty and reliability as newproducts at substantial cost savings.

Machine Selection. Make detailedcomparisons of the machines underconsideration before purchase.Cat dealers can estimate componentlife, preventive maintenance cost,and the true cost of lost production.

Purchase. Look past initial price.Consider the financing options available,as well as day-to-day operating costs.Look at dealer services that can beincluded in the cost of the machine toyield lower equipment owning andoperating costs over the long run.

Customer Support Agreements.Cat dealers offer a variety of productsupport agreements and work withcustomers to develop a plan that bestmeets specific needs. These plans cancover the entire machine, includingattachments, to help protect thecustomer’s investment.

Operation. Improving operatingtechniques can boost your profits.Your Cat dealer has videotapes,literature, and other ideas to help youincrease productivity, and Caterpillaroffers certified operator training classesto help maximize the return on yourmachine investment.

Maintenance Services. Talk to yourdealer about the range of availablemaintenance services. Repair optionprograms guarantee the cost of repairsup front. Diagnostic programs suchas S•O•S and Coolant Sampling andTechnical Analysis help avoidunscheduled repairs.

Replacement. Repair, rebuild, or replace?Your Cat dealer can help you evaluatethe cost involved so you can make theright choice.

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Customer SupportCat dealer services help you operate longer with lower costs.

15143H Motor Grader specifications

Torque rise 50%Max torque @ 1000 RPM 1095 N•m 808 lb ftSpeed @ rated power 2000 RPMNumber of cylinders 6Derating altitude 3048 m 10,000 ftStd - Fan speed - max 1350 RPMStd - Fan speed - min 500 RPMStd - Ambient Capability 47° C 117° F

• Net power is tested per ISO 9249, SAE J1349, and EEC 80/1269standards in effect at the time of manufacture.

• VHP Plus is an optional arrangement.

• Net power advertised is the power available at ratedspeed of 2000 RPM, measured at the flywheel when engineis equipped with fan, air cleaner, muffler, and alternator.

• No derating required up to 3048 m (10,000 ft) altitude.Deration rate of 1.5% per 304.8 m (1000 feet) above 3048 m(10,000 feet).

Engine

Engine Model Cat 3176C DITA ATAAC,Variable HP

VHP - gears 1-3 Net 123 kW 165 hpVHP - gears 4-8 Net 138 kW 185 hpVHP Plus - gears 1-3 Net 123 kW 165 hpVHP Plus - gears 4-6 Net 138 kW 185 hpVHP Plus - gears 7-8 Net 153 kW 205 hpVHP - gears 1-3 Gross 136 kW 182 hpVHP - gears 4-8 Gross 151 kW 202 hpVHP Plus - gears 1-3 Gross 136 kW 182 hpVHP Plus - gears 4-6 Gross 151 kW 202 hpVHP Plus - gears 7-8 Gross 166 kW 222 hpVHP AWD on - gears 1-3 Gross 151 kW 202 hpVHP AWD on - gears 4-8 Gross 166 kW 222 hpVHP Plus AWD on -

gears 1-3 Gross 151 kW 202 hpgears 4-6 Gross 166 kW 222 hpgears 7-8 Gross 180 kW 242 hp

Displacement 10.3 L 629 in3

Bore 125 mm 4.9 inStroke 140 mm 5.5 in

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16 143H Motor Grader specifications

Service Refill

Fuel Tank 397 L 105 galCooling system 38 L 10 galHydraulic system - total 80 L 20.8 galHydraulic system - tank 38 L 9.9 galEngine oil 39 L 10.2 galDifferential / Final Drives 47 L 12.4 galTandem housing (each) 64 L 16.9 galFront wheel spindle bearing housing 0.5 L 0.13 galCircle drive housing 7 L 1.8 gal

Frame

Circle - diameter 1530 mm 60.2 inCircle - blade beam thickness 30 mm 1.2 inDrawbar - height 127 mm 5 inDrawbar - thickness 76 mm 3 inFront - top/bottom plate - width 305 mm 12 inFront - top/bottom plate - thickness 25 mm 1 inFront - side plates - width 241 mm 9.5 inFront - side plates - thickness 12 mm 0.5 inFront - linear weights - min 165 kg/m 112 lb/ftFront - linear weights - max 213 kg/m 144 lb/ftFront - section modulus - min 2083 cm3 127 in3

Front - section modulus - max 4785 cm3 291 in3

Front axle - ground clearance 625 mm 24.6 inFront axle - front wheel lean 18ºFront axle - oscillation angle 32º

Tandems

Height 572 mm 22.5 inWidth 201 mm 7.9 inSidewall thickness - inner 16 mm 0.63 inSidewall thickness - outer 18 mm 0.71 inDrive chain pitch 51 mm 2 inWheel axle spacing 1522 mm 60 inTandem oscillation - forward 15ºTandem oscillation - reverse 25º

Power Train

Forward/Reverse Gears 8 fwd/6 revTransmission Direct drive, power shiftBrakes, Service air-actuated, oil-discBrakes, Service - surface area 23 948 cm2 3,712 in2

Brakes, Parking manual, multiple oil-discBrakes, Secondary air actuated, oil-disc

All-Wheel Drive System

Pump output (2500 rpm, 35000 kPa) 175 L/min 46.2 gal/minMaximum operating pressure 35 000 kPa 5,080 psiMinimum operating pressure 5500 kPa 800 psiMotor displacement - high 1650 cc/rev 100.7 in3/revMotor displacement - low 660 cc/rev 40.2 in3/rev

Hydraulic System

Circuit type Closed center load sensePump type Axial pistonPump output @ 2100 RPM 206 L/min 54.4 gal/minMaximum system pressure 24 150 kPa 3,500 psiReservoir tank capacity 38 L 9.9 galStandby pressure 3100 kPa 450 psi

Operating Specifications

Top Speed - Fwd. 44 kph 27.4 mphTop Speed - Rev. 34.7 kph 21.6 mphTurning radius (outside front tires) 7.5 m 24.6 ftSteering Range - left/right 50ºArticulation Angle - left/right 20ºFwd. 1st 3.8 kph 2.3 mphFwd. 2nd 5.1 kph 3.2 mphFwd. 3rd 7.4 kph 4.6 mphFwd. 4th 10.3 kph 6.4 mphFwd. 5th 16.2 kph 10 mphFwd. 6th 22 kph 13.7 mphFwd. 7th 30.3 kph 18.8 mphFwd. 8th 44 kph 27.4 mphRev. 1st 3 kph 1.8 mphRev. 2nd 5.6 kph 3.5 mphRev. 3rd 8.1 kph 5 mphRev. 4th 12.8 kph 7.9 mphRev. 5th 23.9 kph 14.8 mphRev. 6th 34.7 kph 21.6 mph

17143H Motor Grader specifications

Scarifier

Front, V-Type: Working width 1184 mm 46.6 inFront, V-Type: Scarifying depth, 292 mm 11.5 in

maximumFront, V-Type: Scarifier shank 11

holdersFront, V-Type: Scarifier shank 116 mm 4.6 in

holder spacingFront, straight: Working width 1800 mm 71 inFront, straight: Scarifying depth, 317 mm 12.5 in

maximumFront, straight: Scarifier shank 17

holdersFront, straight: Scarifier shank 111 mm 4.38 in

holder spacingRear: Working width 2300 mm 91 inRear: Ripping depth, maximum 411 mm 16.2 inRear: Scarifier shank holders 9Rear: Scarifier shank holder 267 mm 10.5 in

spacing

Weights

Gross Vehicle Weight - max 22 146 kg 48,863 lbfront axles 7906 kg 17,443 lbrear axles 14 240 kg 31,420 lb

Gross Vehicle Weight - base 15 270 kg 33,670 lbfront axles 4305 kg 9,493 lbrear axles 10 965 kg 24,177 lb

• Base operating weight calculated on standard machineconfiguration with 14.00-24 10PR (G-2) tires, full fuel tank,coolant, lubricants, and operator.

Cab

• ROPS (Rollover Protective Structure) meets the followingcriteria: SAE J1040 MAY 94, ISO 3471:1986, ISO 3471:1994

• FOPS (Falling Object Protective Structure) meets the followingcriteria: ISO 3449:1984, ISO 3449:1992 Level II

Brakes

• Brakes meet the following standard: SAE J/ISO 3450 JAN 98.

Moldboard

Blade Width 3.658 m 12 ftBlade Height 610 mm 24 inBlade Thickness 22 mm 0.87 inArc radius 413 mm 16.25 inThroat clearance 120 mm 4.7 inCutting edge - width 152 mm 6 inCutting edge - thickness 16 mm 0.63 inEnd Bit - width 152 mm 6 inEnd Bit - thickness 16 mm 0.63 inBlade Pull - max GVW 19 931 kg 43,977 lbBlade Pull - base GVW 13 743 kg 30,303 lbDown Pressure - max GVW 13 665 kg 30,126 lbDown Pressure - base GVW 7441 kg 16,400 lb

• Blade pull calculated at 0.9 traction coefficient, whichis equal to ideal no-slip conditions, and Gross VehicleWeight (GVW).

Blade Range

Circle centershift - right 728 mm 28.7 inCircle centershift - left 695 mm 27.4 inMoldboard sideshift - right 660 mm 26 inMoldboard sideshift - left 524 mm 20.6 inMaximum blade position angle 90ºBlade tip range (forward) 40ºBlade tip range (backward) 5ºMaximum shoulder reach 1978 mm 77.9 inoutside of tires - rightoutside of tires - left 1896 mm 74.6 inMaximum lift above ground 480 mm 18.9 inMaximum depth of cut 715 mm 28.1 in

Ripper

Ripping depth, maximum 462 mm 18.2 inRipper shank holders 5Ripper shank holder spacing 533 mm 21 inPenetration force 8047 kg 17,740 lbPryout force 9281 kg 20,460 lbMachine length increase, 970 mm 38.2 inbeam raised

18 143H Motor Grader specifications

DimensionsAll dimensions are approximate. Based on standard machine configuration with 14.00-24 10PR tires.

1 Height - low profile cab 3131 mm 123 inHeight - high profile cab 3356 mm 132 inHeight - no cab 3103 mm 122.2 in

2 Height to axle 600 mm 23.6 in3 Length - between tandem axles 1523 mm 60 in4 Length - front axle to moldboard 2561 mm 100.8 in5 Length - front axle to mid tandem 6169 mm 242.9 in6 Length - front tire to 8713 mm 343 in

end of rear frame

7 Length - counterweight to ripper 10 097 mm 398 in8 Ground clearance at trans. case 344 mm 13.5 in9 Height to exhaust stack 3103 mm 122.2 in10 Height to top of cylinders 3028 mm 119.2 in11 Width - tire center lines 2091 mm 82.3 in12 Width - outside rear tires 2457 mm 96.7 in13 Width - outside front tires 2553 mm 100.5 in

910

28

11

5

4 3

12

13

1

6

7

19143H Motor Grader specifications

Standard EquipmentStandard equipment may vary. Consult your Caterpillar dealer for details.

POWER TRAINAir cleaner with dry-type radial seal,

service indicator, automatic dust ejectorAir-to-Air Aftercooler (ATAAC)Brakes — oil disc, four-wheel air actuatedDemand fanDifferential, lock-unlockEngine, 3176C ETA diesel with VHP,

automatic derate, automatic idle controlFuel tank, sediment drainFuel-water separatorLube for life pump drive shaftMuffler, under hoodParking brake — multi-disc, sealed and oil cooledPre-screenerPriming pump, fuelSerpentine belt, automatic tensionerTandem driveTransmission

8 forward/6 reverse speedspower shiftdirect driveelectronic shift controloverspeed protection

OTHER STANDARD EQUIPMENTAntifreeze –35°C (–30°F)Bumper, rear, integrated, with hitchClutch, circle drive slipCutting edges

152 mm � 16 mm (6" � 5/8")curved DH-2 steel16 mm (5/8") mounting bolts

Doors, engine compartment, lockingDrawbar — 6 shoe, replaceable wear stripsEnd bits — 16 mm (5/8") DH-2 steel, 16 mm (5/8")

mounting boltsEngine shutdown, ground levelFrame, articulated with safety lockFuel tank, 397 L (105 gallon)Fueling, ground levelHorn, airMoldboard

3658 mm � 610 mm � 22 mm (12' � 24" � 7/8")hydraulic sideshift and tip

Radiator cleanout accessS•O•S ports: engine, hydraulic, transmission, coolant, fuelTool box

TIRES, RIMS, AND WHEELSPartial allowance: 14.00-24 10PR on 9" single piece rims

ELECTRICALAlarm, back-upAlternator, 75 ampere, sealedBatteries, maintenance free, 1100 CCAElectrical system, 24 voltLights, stop and tailMotor, startingProduct link connection

OPERATOR ENVIRONMENTAcceleratorAshtray and lighterCoat hookControl console, adjustableCup holderEMS III operator warning systemPanel gauges inside the cab

fuelarticulationengine coolant tempsystem voltageair brake pressure

Hydraulic controls, load sensingright/left blade lift with float positionblade sideshift and tipcircle drivecentershiftfront wheel leanarticulation

Meter, hour, digitalMirror, inside rearview, wide angleMounting bracket, general purposePower steering, hydraulicROPS cab, sound suppressed, low profileSeat, cloth, contour suspensionSeat belt, retractable 76 mm (3 in)Steering wheel, tilt, adjustableStorage area for cooler/lunchboxSunscreen, front windshieldThrottle control, electronicWasher/wipers, (3) front windshieldsWindows, fixed lower front

Optional EquipmentOptional equipment may vary. Consult your Caterpillar dealer for details.

kg lb

Hydraulic arrangements with one or moreadditional hydraulic valves are availablefor front scarifier, rear ripper-scarifier,dozer, dozer angle, snow plow, andnow wing. See dealer price list.

Hydraulic lockout 2 5Lighting systems:

bar mounted, directional and headlights 13 28cab mounted, directional and headlights 9 20cab and bar mounted, directional,headlights and work lights 22 48cab and bar mounted, high, directional,headlights and work lights 22 48work lights, front and rear 6 13snow wing light, right 18 40warning light, cab or canopy mounted 3 6

Mirrors, dual, inside mountedMirrors, outside mounted 8 18Mirrors, outside mounted, heated 8 18Power port, 12-V 2 5Precleaner, turbine-typePush plate, front mounted 919 2025Radio ready, entertainmentReceptacle — starting, plug-in 2 5Rims, tires — see dealer price listRipper-scarifier, rear 961 2119Ripper-scarifier/tooth, one 33 72Rear scarifier, shanks/teeth, nine 65 144Scarifier, front mounted, V-type 845 1862Scarifier, front mounted, straight 903 1988Seat, cloth-covered, contour air suspensionSnow arrangements, refer to

Snow Arrangement SupplementSound suppression 91 200Speedometer/tachometer 1 2Steering, secondary 50 111Sunshade, rear window 3 7Windows, lower front, opening 3 6Windows, sliding side 4 8Wiper and washer, rear, intermittent 7 16Wipers, intermittent (3), front 0.5 1European roading group which provides an

additional air tank, air circuit protection valve and two position lights with integral turn signals. Dealer supplied equipment is required to meet some specific country on-road requirements 23 52

kg lb

Accumulators, blade lift 71 156Accumulators, blade lift 71 156Air conditioner with heater and pressurizer 49 107Air dryer 13 29Autoshift, transmission 2 5Batteries, extreme duty, 1300 CCA 15 32Blade, 3658 mm � 688 mm � 25 mm

(12 ft � 27 in � 1 in) 151 340Blade, 3962 mm � 686 mm � 25 mm

(13 ft � 27 in � 1 in) 164 362Blade, 4267 mm x 610 mm � 22 mm

(14 ft � 24 in � 7/8 in) 75 166Blade, 4267 mm � 688 mm � 25 mm

(14 ft � 27 in � 1 in) 261 574Blade, front-mounted, 2750 mm � 980 mm

(9 ft � 39 in) 850 1874Cab, ROPS, high profile, sound suppressed 77 170Converter, 25-amp, 24-V to 12-V 5 11Covers, louver with screen 7 15Covers, lower rear frame 11 25Covers, metallic, fuel tank 11 25Cutting edges for 22 mm (7/8 in) thick blade

203 mm � 19 mm (8 in � 3/4 in) for 3.7 m blade203 mm � 19 mm (8 in � 3/4 in) for 4.1 m blade203 mm � 16 mm (8 in � 5/8 in) for 3.7 m blade203 mm � 16 mm (8 in � 5/8 in) for 4.1 m blade

Cutting edges for 25 mm (1 in) thick blade203 mm � 19 mm (8 in � 3/4 in) for 3.7 m blade203 mm � 19 mm (8 in � 3/4 in) for 4.1 m blade

End bits, overlay, reversible 11 24Engine, VHP Plus 4 10Ether starting aid 1 2Extensions, blade 610 mm (2 ft) right and left

for 22 mm (7/8 in) thick blade 114 250for 25 mm (1 in) thick blade 148 325

Fan, defroster, front and rear 2 4Grader bit system, penetration bit type 163 360Guard, brake lines 8 18Guard, lower platform 23 50Guard, transmission 98 215Hammer, with mounting 5 12Heater, engine coolant 1 3Heater, with pressurizer 18 40

20 143H Motor Grader specifications

21143H Motor Grader specifications

Notes

143H Motor Grader specifications22

Notes

143H Motor Grader specifications 23

Notes

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© 2003 CaterpillarPrinted in U.S.A.

Materials and specifications are subject to change without notice.Featured machines in photos may include additional equipment.

See your Caterpillar dealer for available options.

AEHQ5509-01 (10-03)

Replaces AEHQ5509 (8-02)

143H Motor Grader