®®

Global VersionCat® 3126B DITA ATAAC VHP

Base Power (all gears) 93 kW 125 hpVariable Horsepower Arrangement

- gears 1-3 93 kW 125 hp- gears 4-8 104 kW 140 hp

WeightsGross Vehicle Weight - base 12 650 kg 27,880 lb

front axle 3611 kg 7959 lbrear axle 9039 kg 19,921 lb

MoldboardBlade Width 3658 mm 12 ft

120HMotor Grader

2

120H Motor GraderThe 120H 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 120H representsa reliable, cost-effective investment.

Environmentally Responsible Design

New engine arrangements and operatorstation designs reduce emissions tomeet current and anticipated regulationsfor interior and exterior sound levels,emissions, exhaust. pg. 12

✔

Operator’s Station

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

✔

Hydraulics

The load-sensing hydraulic systemlowers power consumption and systemheat. The advanced PPPC controlvalves provide low lever effort,balanced flow and consistent cylinderspeeds for outstanding blade control.Blade float is incorporated into theblade lift valves. pg. 6

Power Train

The power shift transmission takesfull advantage of the powerful 3126Bengine. Variable Horsepower usesspecific torque curves for each gearrange for optimum performance.Dual air system and multi-disc oilbrakes assure reliable braking control.pg. 5

Engine

The Cat 3126B DITA ATAAC isdesigned to handle the tough loads.Variable Horsepower matches torquecurves to the gear to maximizeresponse, power, and efficiency. Lowfuel consumption reduces operatingcosts and reduces environmentalimpact. pg. 4

✔

✔ New Feature

3

Customer Support

Your Cat dealer offers a range ofservices that help you operate longerwith lower costs. pg. 13

Serviceability

Caterpillar® re-engineered inspectionand service points, grouping them into aconvenient left-hand side, ground level‘service center.’ Ground level fuelingand extended engine and hydraulic oilchange intervals help minimizedowntime. pg. 9

✔

Structures

The 120H frame is designed and builtto exceed the expectations of thecustomer. pg. 8

Drawbar, Circle, Moldboard

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

3126B DITA ATAAC Engine. Theinnovative Cat 3126B diesel enginedelivers large-engine performance froma compact engine design. The six-cylinderengine is turbocharged and air-to-airaftercooled. With high displacementand low rated speed, this engineprovides excellent fuel economy anddurability that can significantly reduceoperating costs.

Variable Horsepower (VHP).Automatically increases horsepower inhigher gears when the machine can useit. In applications such as snow removal,this power allows higher travel speedsand faster snow removal for more snowclearing in less time. Also, the higherrimpull in all gears maximizesperformance during high-speed wingingand heavy snow load applications. Inlower gears where traction is limited,horsepower is limited, reducing wheelslip and conserving fuel.

Lugging Performance. High torqueoutput and torque rise makes the 3126Bvery 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 reducedemissions. The dual-filter systemreduces component wear.

Turbocharged and Air-To-AirAftercooled. Turbocharger packs moredense air into the cylinders for morecomplete combustion and loweremissions, improving performanceand engine efficiency. These benefitsare especially useful at high altitudes.Air-to-air aftercooler reduces smokeand emissions by providing coolerinlet air for more efficient combustion.This also extends the life of the pistonrings and bore.

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

Hydraulic Demand Fan. The hydraulicdemand fan control automaticallyadjusts fan speed according to enginecooling requirements. This systemreduces demands on the engine, puttingmore power to the ground andimproving fuel efficiency.

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

Improved Torque. Power curvescustomized for the 120H increase peaktorque for higher ground speeds andenhanced productivity. Rimpull hasbeen increased in all gears for greaterproductivity.

Emissions Compliant. The 120H hasreduced NOx, hydrocarbon, andparticulate emissions. The Cat 3126Bmeets or exceeds all U.S. EPA Tier 2and EU Stage II emissions controlstandards worldwide.

4

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-powershifting as well as inching capability.

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

Gear Selection. Eight forward andsix reverse speeds offer a wide operatingrange for maximum flexibility.Four gears below 9.9 km/h (6.2 mph)match working speed to job conditionsfor maximum productivity inearthmoving jobs. Gears five, six andseven are optimal for efficient snowremoval operations. Gear 8 is designedfor roading.

Electronic Transmission Control.Produces easy, smooth shifts tomaintain uniform surfaces duringshifting, and extends transmission lifeby reducing stress on transmissionclutches. A single lever controlsdirection, gear and the parking brake.

Electronic Clutch Pressure Control.ECPC smoothes shifts and improvesinching control, which increasesoperator comfort and productivity.It uses input from the transmissionand operator controls to modulate thedirectional clutches and produceconsistent shifting.

Electronic Overspeed Protection.The transmission control upshifts thetransmission 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 gearwith low pedal effort and excellentmodulation, critical in close-quarterwork or finish grading. A new pedaldesign and location provides outstandingmodulation and operator comfort.

Dual Air Tanks. Supply braking capacityto each side of the machine. This systemensures secondary braking capability inthe event a failure occurs in a singlebrake line. The dual air system also hasa large reserve for stalled-engine braking.

Brakes. Caterpillar multi-disc brakesoffer a large surface area fordependable, extended-life braking.The air-actuated service brakes, locatedin each of the four wheel spindlehousings, are sealed, adjustment free,and lubricated and cooled by tandemhousing oil. The parking/emergencybrakes, located in the transmission onthe output shaft, are spring actuated andair pressure released. When engaged,they neutralize the transmission andlock the wheels on any surface.

5

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 andenhanced machine performance andefficiency. Continuously matchinghydraulic flow and pressure to powerdemands creates less heat and reducespower consumption.

Implement Control Valves. PPPC valveshave different flow rates for the headand rod ends of the cylinder. Thisinsures consistent extension andretraction properties for each cylinder,and improves operator ‘feel’ and systemresponse. All control valves use lockvalves to maintain blade settings. Linerelief valves protect cylinders fromexcessive pressure.

Balanced Flow. Hydraulic flow isproportioned to ensure all implementsoperate simultaneously. If demandexceeds pump capacity, all cylinders arereduced by the same ratio. The result isimproved productivity in virtually anyapplication.

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 of theblade to follow a hard surface while theoperator 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 control leversduring machine roading. This preventsimplements from being accidentallyengaged when the motor grader istravelling down the road.

6

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-2™ steelcutting edge and end bits, and replaceablemetallic wear inserts assure a long,reliable service life. Three sideshiftmounting locations for the optionalmoldboard 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 particularlyhelpful in handling very dry materials,cohesive soils, snow and ice.

Circle Construction. One-piece forgedcircle with hydraulically driven motorstands up to high stress loads. Raisedwear surfaces prevent circle teethwear against the drawbar. Sixty-fouruniformly spaced teeth on the front240° of the circle are flame cut and heatinduction hardened to resist wear. Andthe circle, with 360° rotation, is securedto the drawbar by four vertically andhorizontally adjustable shoes formaximum 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. The standardcircle drive slip clutch protects thedrawbar, circle and moldboard 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.

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

7

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

Integrated Bumper. The integratedbumper ties the rear frame together intoa cohesive unit, to handle the loadspossible with the new 3126B powertrain. This is especially important inripping and snow removal applicationswhere graders are equipped with snowwing attachments.

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

Front Frame. Continuous top and bottomplate construction provides consistencyand strength. The flanged box sectiondesign removes welds from high stressareas, improving reliability anddurability, and increasing resale valuesfor the customer.

8

StructuresThe 120H 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. Gathering many of thefrequently serviced items into a ‘ServiceCenter’ on the left side greatly improvesaccess, and helps ensure propermaintenance and inspection routines,The result is 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, coolant

• Remote lubrication points, purgevalves and ecology drain lines

• Fuse panel with new automotivestyle fuses located inside cab

• Sample ports for engine, hydraulic,transmission fluids, coolant and fuel,encourages preventive maintenanceand diagnostics like the S•O•SSM

analysis program.

Fuel Tank. A 340 L (90 gal) groundlevel fuel tank allows longer work shiftsand reduces refueling times. A fuel tanksediment drain enables the operator toremove sediment accumulation, reducingthe risk of fuel system damage.

Extended Fluid Change Interval.Operate a full 500 hours betweenengine oil and filter changes,4,000 hours between hydraulic oilchanges, and 12,000 hours betweenengine coolant changes. This reducesdowntime and operating expense.

Cat XT Hose. Caterpillar XT hosetechnology allows high pressuresfor maximum power and reduceddowntime, and intelligent routingminimizes exposure 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.

9

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

10

The 120H includes innovative changes to improve operator efficiency and, in turn, greatermachine productivity.

Operator’s Station

Comfort and Convenience. Comfort andconvenience are designed into everyfeature of the operator’s station.

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

Electronic Throttle Control. ETCprovides easier, more precise, moreconsistent throttle operation. Twomodes on a single switch offerflexibility for varying applications andoperator preference. Like cruise control,ETC improves fuel efficiency.

Electronic Monitoring System. Powerfulmonitoring and diagnostic capabilitiesallow more efficient and more reliablemachine operation. The Cat EMS IIIkeeps operators better informed ofmachine status with:

• Continuous tracking of all criticalmachine parameters on a dash display

• Warnings/alerts for abnormalconditions

• Retrieval or adjustment of over200 electronic system parametersusing the 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 switches andtransmission shifter are backlit fornighttime operation.

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

Suspension Seat. Optional contourseries suspension seat features fold-uparmrests and a retractable seat belt.The seat can easily adjust for optimalsupport and comfort. Seat controlsare located within easy reach and inplain view.

Fresh Air Filters. Located above eachcab door for quick replacement.

Optional 12V Power Port. Available foruse with computers, cellular phones orother electronic equipment.

Exceptional Visibility. The narrowoperator’s console provides goodforward visibility. Large side windowsallow a clear view of the moldboardheel and tandem tires. A wide rearwindow and tapered engine hoodprovide a good view to the rear of themachine. The position of the air dryerand air cleaner, and the alignment theprecleaner and muffler, provides goodvisibility to the rear of the machine.Operators can work more confidentlyand efficiently.

11

Quiet Cab. The resiliently mountedengine and transmission provideinterior sound levels of 76dB(A) whenmeasured with the doors and windowsclosed per ISO 6394. Lower interiornoise levels improve operator workingconditions.

Quiet Machine. Exterior sound level of107dB(A) when tested per ISO 6395,Annex B. The optional soundsuppression group complies withthe EU 2000/14/EC sound limit of107 dB(A). This quiet operation lets the120H work with minimal disturbanceto the surroundings.

Low Emissions. The 120H MotorGrader is even more environmentallyfriendly than its predecessors withreductions in NOx, hydrocarbon, andparticulate emissions. It meets orexceeds all U.S. EPA Tier II andEU Stage II emissions control standardsworldwide.

Fuel Efficient. Caterpillar state-of-the-art electronically controlled, unitinjection fuel system has high injectionpressure for complete fuel combustion,increased fuel efficiency and reducedemissions.

Dry Machine. Lubricant fill pointsand filters are designed to minimizespillage. O-ring face seals, Cat XT hoseand Cat hydraulic cylinders protectagainst leaks.

Extended Oil Change Interval. Operate afull 500 hours between engine oil andfilter changes, and 4000 hours betweenhydraulic oil changes. This reducesmachine downtime and operatingexpense, and helps preserve our naturalresources.

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 ofchloroflourocarbons (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 world-wide computernetwork to find in-stock parts tominimize machine down time. Savemoney with genuine Cat Reman parts.You receive the same warranty andreliability as new products at substantialcost savings.

Machine Selection. Make detailedcomparisons of the machines underconsideration before purchase. Catdealers can estimate component life,preventive maintenance cost, and thetrue cost of lost production.

Purchase. Look past initial price.Consider the financing options availableas 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, literatureand other ideas to help you increaseproductivity, and Caterpillar offerscertified operator training classes tohelp 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 such asS•O•SSM Analysis and Coolant Samplingand Technical Analysis help avoidunscheduled repairs.

Replacement. Repair, rebuild orreplace? Your Cat dealer can help youevaluate the cost involved so you canmake the right choice.

13

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

14 120H Motor Grader specifications

Number of cylinders 6Derating altitude 3048 m 10,000 ftStd - Fan speed - max 1210 RPMStd - Fan speed - min 500 RPMStd - Ambient Capability 47° C 117° FHi Ambient - Fan speed - max 1300 RPMHi Ambient - Fan speed - min 500 RPMHi - Ambient Capability 50° C 122° F

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

• VHP is an optional arrangement.

• Net power advertised is the power available at rated speedof 2000 rpm, measured at the flywheel when engine isequipped 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 3126B DITA ATAAC VHPBase Power (all gears) Net 93 kW 125 hpVHP - gears 1-3 Net 93 kW 125 hpVHP - gears 4-8 Net 104 kW 140 hpBase Power (all gears) Gross 104 kW 139 hpVHP - gears 1-3 Gross 104 kW 139 hpVHP - gears 4-8 Gross 115 kW 154 hpDisplacement 7.2 L 439 in3

Bore 110 mm 4.3 inStroke 127 mm 5 in

Torque rise 50%Max torque @ 1000 rpm 737 N•m 544 lb ftSpeed @ rated power 2000 RPM

500 1000 1500 2000 2500

200

400

600

800900

300

600

900

1200En

gine

Tor

que

(N•m

)

(lb-ft

)

0.3

0.4

0.5

0.6

BSFC

(g/k

W/h

r)

(lb/h

p-hr

)

200

250

300

350

40

80

120

160

200

8050

120

160

200

240

Engi

ne P

ower

(kW

)

(bhp

)

Engine Speed RPM GrossNet

500 1000 1500 2000 25000.3

0.4

0.5

0.6

200

250

300

350

BSFC

(g/k

W/h

r)

(lb/h

p-hr

)

Engine Speed RPM

200

400

600

800900

300

600

900

1200

Engi

ne T

orqu

e(N

•m)

(lb-ft

)

40

80

120

160

200

8050

120

160

200

240

Engi

ne P

ower

(kW

)

(bhp

)

GrossNet

Gears 4 - 8Base Gears 1 - 8VHP Gears 1 - 3

15120H Motor Grader specifications

Service Refill

Fuel Capacity 340 L 90 galCooling system 40 L 10.4 galHydraulic system - total 68 L 17.7 galHydraulic system - tank 38 L 9.9 galEngine Oil 29.5 L 7.8 galDifferential/Final Drives 47 L 12.2 galTandem housing (each) 49 L 12.7 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 280 mm 11 inFront-top/bottom plate - thickness 22 mm 0.9 inFront-side plates - width 236 mm 9.3 inFront-side plates - thickness 10 mm 0.4 inFront-linear weights - min 134 kg/m 90 lb/ftFront-linear weights - max 172 kg/m 115 lb/ftFront-section modulus - min 1619 cm3 99 in3

Front-section modulus - max 3681 cm3 225 in3

Front axle - ground clearance 608 mm 23.9 inFront axle - front wheel lean 18ºFront axle - oscillation angle 32º

Tandems

Height 438 mm 17.2 inWidth 172 mm 6.8 inSidewall thickness - inner 14 mm 0.55 inSidewall thickness - outer 16 mm 0.63 inDrive chain pitch 44.5 mm 1.75 inWheel axle spacing 1510 mm 59.5 inTandem oscillation - forward 15ºTandem oscillation - reverse 25º

Power Train

Forward/Reverse Gears 8 fwd/6 revTransmission direct drive, power shiftBrakes - Service air actuated, multiple

oil discBrakes - Service, surface area 16 744 cm2 2,595 in2

Brakes - Parking air-actuated, multipleoil-disc

Brakes - Secondary dual circuit

• Brakes meet the following standards: SAE J/ISO 3450 JAN98.

Hydraulic System

Circuit type closed center load sensePump type variable pistonPump output 144 L/min 38 gal/minMaximum system pressure 24 150 kPa 3,500 psiStandby Pressure 3100 kPa 450 psi

• Pump output measured @ 2000 RPM

Operating Specifications

Top Speed - Fwd. 42.6 kph 26.5 mphTop Speed - Rev. 33.7 kph 20.9 mphTurning radius (outside front tires) 7.3 m 23.6 ftSteering range - left/right 50ºArticulation angle - left/right 20ºFwd. 1st 3.6 kph 2.3 mphFwd. 2nd 5 kph 3.1 mphFwd. 3rd 7.2 kph 4.5 mphFwd. 4th 9.9 kph 6.2 mphFwd. 5th 15.7 kph 9.7 mphFwd. 6th 21.3 kph 13.2 mphFwd. 7th 29.3 kph 18.2 mphFwd. 8th 42.6 kph 26.5 mphRev. 1st 2.9 kph 1.8 mphRev. 2nd 5.4 kph 3.4 mphRev. 3rd 7.8 kph 4.9 mphRev. 4th 12.4 kph 7.7 mphRev. 5th 23.1 kph 14.4 mphRev. 6th 33.7 kph 20.9 mph

16 120H 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: Scarfying depth, 317 mm 12.5 in

maximumFront, straight: Scarifier 17

shank holdersFront, straight: Scarifier shank 111 mm 4.38 in

holder spacing

Weights

Gross Vehicle Weight - max 16 922 kg 37,306 lb- front axle 5076 kg 11,190 lb- rear axles 11 846 kg 23,116 lb

Gross Vehicle Weight - base 12 650 kg 27,880 lb- front axle 3611 kg 7,959 lb- rear axles 9039 kg 19,921 lb

• Base operating weight calculated on standard machineconfiguration with 13.00-24 10PR (G-2) tires, full fuel tank,coolant, lubricants and operator.

Cab

• ROPS (Rollover Protective Structure) meets the followingcriteria: SAE J1040 MAY 1994, ISO 3471:1986, ISO3471:1994

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

Moldboard

Blade Width 3658 mm 12 ftMoldboard Height 610 mm 24 inThickness 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 10 661 kg 23,504 lbBlade Pull - base GVW 8081 kg 17,816 lbDown Pressure - max GVW 9100 kg 20,056 lbDown Pressure - base GVW 6574 kg 14,488 lb

• Blade Pull calculated at 0.9 traction coefficient, which isequal to ideal no-slip conditions, and Gross VehicleWeight (GVW).

Blade Range

Circle centershift - right 628 mm 24.7 inCircle centershift - left 625 mm 24.6 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 outside of tires

- right 1912 mm 75.3 in- left 1840 mm 72.4 in

Maximum lift above ground 457 mm 18 inMaximum depth of cut 775 mm 30.5 in

Ripper

Ripping depth, maximum 262 mm 10.3 inRipper shank holders 5Ripper shank holder spacing 533 mm 21 inPenetration force 4343 kg 9,566 lbPryout force 2279 kg 5,020 lbMachine length increase, 1058 mm 41.7 inbeam raised

17120H Motor Grader specifications

DimensionsAll dimensions are approximate.

1 Height - low profile cab 3108 mm 122 in- high profile cab 3332 mm 131 in- no cab 3090 mm 121 in

2 Height to axle 594 mm 23.4 in3 Length - between tandem axles 1510 mm 59.4 in4 Length - front axle to moldboard 2596 mm 102.2 in5 Length - front axle to mid tandem 5923 mm 233 in6 Length - front tire to end of

rear frame 8314 mm 327.3 in

7 Length - counterweight to ripper 10 064 mm 396.2 in8 Ground clearance at trans. case 351 mm 13.8 in9 Height to exhaust stack 3138 mm 123 in10 Height to top of cylinders 2912 mm 115 in11 Width - tire centerlines 2056 mm 80.9 in12 Width - outside rear tires 2402 mm 94.6 in13 Width - outside front tires 2441 mm 96.1 in

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 after cooler (ATAAC)Brakes - oil disc, four-wheel air actuatedDemand fanDifferential, lock-unlockEngine, 3126 DITA 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 in � 5/8 in)curved DH-2 steel16 mm (5/8 in) mounting bolts

Doors, engine compartment, lockingDrawbar - 4 shoe, replaceable wear stripsEndbits - 16 mm (5/8 in) DH-2 steel, 16 mm (5/8 in)

mounting boltsFrame, articulated with safety lockFuel tank, 90 gallon (340 L)Fueling, ground levelGround level engine shutdownHorn, airLink bar, 7 positionMoldboard

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

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

TIRES, RIMS, & WHEELSPartial allowance: 13.00-24 10PR on 9" single piece rims

ELECTRICALAlarm, back-upAlternator, 35 ampere, sealedBatteries, maintenance free, 750 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

fuelarticulation engine 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, covered adjustableSeat 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

18 120H Motor Grader specifications

19120H Motor Grader specifications

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

kg lb

Hydraulic arrangements with one or more additional hydraulic valves are available for front scarifier, rear ripper-scarifier, dozer, dozer angle, snow plow and snow 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 mounted – –Mirrors, outside mounted 8 18Mirrors, outside mounted, heated 11 25Power port, 12-V 2 5Push plate, counterweight 919 2025Precleaner, turbine-type 2 5Radio ready, entertainmentReceptacle, starting, plug-in 2 5Rims, tires - refer to dealer price listRipper, rear 612 1350Ripper-scarifier/tooth, one 12 26Scarifier, front mounted, V-type 845 1862Scarifier, front mounted, straight 903 1988Seat, cloth-covered, contour air suspensionSeat, vinyl-covered, contour suspensionSound 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 16Wiper and washer, front, intermittentEuropean roading group which provides

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

kg lb

Accumulators, blade lift 71 156Air conditioner with heater and pressurizer 49 107Air dryer 13 29Alternator, 75 ampere 6 15Batteries, heavy duty, 1100 CCA 44 96Blade, 3962 mm � 688 mm � 25 mm

(13 ft � 27 in � 1 in) 209 460Blade, 4267 mm � 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 1874Blade, front 1180 2602Blade, front, narrow 1100 2425Blade, front with foldable ends 1525 3362Cab, ROPS, high profile, sound suppressed 77 170Canopy, ROPS, high profile,

with rear wall and window –41 –90Converter, 25 ampere, 24V to 12V 5 11Covers, 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

Endbits, overlay, reversible 11 24Engine, VHP 4 10Extensions, 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 4Graderbit system, penetration bit type 163 360Guard, lower platform 23 50Guard, transmission 98 215Hammer, with mounting 5 12Heater, engine coolant 1 3Heater, cab 14 30Heater, cab, with pressurizer 18 40

R

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© 2002 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.

AEHQ5516 (12-02)

Replaces AEHQ5274 (10-98)

120H Motor Grader