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Cat® C6.6 ACERT™ VHPBase Power (1st gear) – Net 103 kW 138 hpVHP Range – Net 103-114 kW 138-153 hpVHP Plus Range – Net 103-136 kW 138-182 hpAWD Range – Net 110-144 kW 148-193 hp

Gross Vehicle Weight – BaseTotal 14 466 kg 31,891 lbFront Axle 4209 kg 9,280 lbRear Axle 10 256 kg 22,611 lb

MoldboardBlade Width 3.668 m 12 ft

120M/120M AWDMotor Grader

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120M Motor GraderThe 120M delivers multiple technological breakthroughs to give you the best returnon your investment.

The 120M motor grader represents arevolution in operational efficiency,visibility, service ease and overallproductivity, setting the new standardand building on the legacy of highquality you can trust.

All-Wheel Drive, Work Tools andAttachments

The Work Tools and optionalattachments for the 120M, includingthe industry leading All Wheel Drivesystem, expand machine versatility,utilization and performance. pg. 16

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Integrated Electronic Solutions

Full systems integration with advancedelectronics including Cat® Messenger,AccuGrade™ blade control system andCat® ET, create a “Smart Machine” thatoptimizes performance and availability.pg. 14

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Structures, Drawbar, Circle andMoldboard

The 120M frame provides a solidworking platform, and the DCMdelivers service ease and precise bladecontrol for maximum productivity.pg. 8

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Steering and Implement Controls

Two joysticks offer precise controland unparalleled ease of operation.This advanced technology makes the120M the most operator-friendly motorgrader in the world. pg. 6

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Operator Station

A technologically advanced cab,featuring joystick controls, providesunmatched comfort and visibility.pg. 4

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� New Feature

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Serviceability and Customer Support

Fast component replacement andminimum downtime are possiblewith Caterpillar’s exceptional partsavailability and dealers’ advancedrebuild and repair capabilities.pg. 20

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Safety

Caterpillar® has been and continues tobe proactive in developing machinesthat meet or exceed safety standards.pg. 18

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Hydraulics

The electro-hydraulic load-sensingsystem provides the foundation foradvanced machine controls, enablingsuperior controllability and preciseand predictable hydraulic movements,with the reliability you expect fromCaterpillar. pg. 13

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Engine

The Cat C6.6 engine combines powermanagement with ACERT™ Technologyto deliver maximum power and efficiencyin every gear while reducing theenvironmental impact. pg. 12

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Power Train

An electronically controlled power shifttransmission assures smooth shiftingand maximum power to the ground.A modular rear axle and hydraulicbrakes simplify serviceability andreduce operating costs. pg. 10

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The 120M features a revolutionary cab design that provides unmatched comfort, visibilityand ease of use, making the operator more confident and productive.

Operator Station

Advanced Joystick Controls.Two electro-hydraulic joysticks reducehand and wrist movement as much as78% compared to conventional levercontrols for greatly enhanced operatorefficiency. The intuitive pattern iseasy to learn and provides the preciseimplement control you expect fromCaterpillar.

Auxiliary Pod and Ripper Control.The optional ripper control and auxiliarycontrol pod are ergonomically positionedto allow simple, comfortable operationfor the multiple hydraulic options.

Visibility. The 120M boasts excellentvisibility to the work area, madepossible with angled cab doors,a tapered engine enclosure anda patented sloped rear window.

Cat Comfort Series Seat. The Cat®

Comfort Series suspension seat has anergonomic high-back design, with extrathick contoured cushions and infinitelyadjustable lumbar support that evenlydistributes the operator’s weight.Multiple seat controls and armrestsare easy to adjust for optimal supportand comfort all day. The optional airsuspension seat enhances ride qualityfor additional comfort.

In-Dash Instrument Cluster.The instrument panel, with easy-to-read,high-visibility gauges and warninglamps, keeps the operator aware ofcritical system information.

Cat Messenger. Cat Messenger providesreal-time machine performance anddiagnostic data. You can quickly viewcritical performance and operatinginformation, in multiple languages,helping to maximize the life andproductivity of the machine.

Controls and Switches. Reliable, long-life rocker switches are located on theright side cab post and front instrumentcluster, within easy reach for the operator.

Comfort and Convenience. Caterpillarhas built the most comfortable cab inthe industry by replacing the controllevers and steering wheel with twojoystick controls, and lengthening thecab to give more leg room.

Multiple adjustment capabilities for thearm rest, wrist rests and joystick podshelp keep the operator comfortablethroughout a long shift.

Low Interior Sound and VibrationLevels. Isolation mounts for the cab,engine and transmission, in additionto the relocation of the hydraulic pumpand valves, provide significant soundand vibration reductions. The lowvibration levels and quiet interiorprovide a comfortable work environment.

HVAC. The heating, ventilation andair conditioning system uses intelligentvent placement for consistent climatecontrol and clear windows for everycondition. The high-capacity systemdehumidifies air and pressurizes thecab, circulating fresh air and sealing outdust. An easily accessible fresh air filteris located outside the cab at groundlevel for quick replacement or cleaning.

Additional Cab Features. Additional cabfeatures include cup holder, lighter andashtray, coat hook, storage area, nighttime light, power port and heater.Optional rearview camera, 25 amppower converter and radio are alsoavailable.

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Ease of Operation. The revolutionaryjoystick controls and exceptionalvisibility make the 120M easier tooperate without sacrificing control.

The intuitive joystick control patternallows both new and experiencedoperators to become productive quickly.

Logical grouping of hydraulic functionsin the joysticks allow any operator toeasily control several functions at thesame time. This allows the operatorto be more productive and remaincomfortable throughout the work shift.

Intuitive Steering Control. The 120Mintroduces a breakthrough in joysticksteering control. This technologycreates a direct relationship betweenthe lean angle of the joystick and theturning angle of the steer tires.

A brake tensioning system holds thejoystick in position until the operatormoves it. In addition, the steeringcontrol automatically reduces steeringsensitivity at higher ground speeds forcomfortable and predictable control.

Electronic Throttle Control. ElectronicThrottle Control (ETC) provides theoperator with easy, precise, and consistentthrottle operation. An automatic andmanual mode on a single switch offersflexibility for different applications andoperator preferences.

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The 120M sets the new standard for motor grader operational efficiency.

Steering and Implement Controls

Left Joystick Functions. The leftjoystick primarily controls the machinedirection and speed.

1 – Steering: Lean joystick left and right

2 – Articulation: Twist joystick leftand right

3 – Articulation Return to Center:Yellow thumb button

4 – Wheel Lean: Two black thumbbuttons

5 – Direction: Index trigger shiftstransmission to forward, neutral orreverse

6 – Gear Selection: Two yellow thumbbuttons upshift and downshift

7 – Left moldboard lift cylinder:Push joystick to lower, pull joystickto raise

7 – Left moldboard lift cylinder float:Pushing joystick through detentengages float

Articulation Return-to-Center.This feature automatically returns themachine to a straight frame position fromany articulation angle with the touch ofa single button. Return-to-Center helpsimprove productivity and safety byallowing the operator to focus oncontrolling the moldboard.

Right Joystick Functions. The rightjoystick primarily controls the Drawbar,Circle and Moldboard functions.

1 – Right moldboard lift cylinder:Push joystick to lower, pull joystickto raise

7 – Right moldboard lift cylinder float:Pushing joystick through detentengages float

2 – Moldboard slide: Lean joystick leftand right

3 – Circle turn: Twist joystick leftand right

4 – Moldboard tip: Thumb switch foreand aft

5 – Drawbar center shift: Thumb switchleft and right

6 – Electronic Throttle Control: Triggerswitch is resume and decrement

7 – Differential Lock/Unlock:Yellow button

1 – Ripper Control Pod. Infinitely variableroller switches control the rear ripperand/or front lift group (when equipped),for easy and comfortable control.

2 – Programmable Auxiliary HydraulicPod. Four fingertip controls and amini joystick maximize hydrauliccontrol flexibility, accommodatingup to six hydraulic circuits. Individualfunctions are easily programmablethrough Cat ET to meet theconfiguration you need.

The optional auxiliary hydraulic pod isprovided when the machine is configuredwith three or more auxiliary functions.

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Front Frame Structure. The 120M frontframe is a formed structural carbon steeltube. Advanced fabrication technologysignificantly reduces the number of weldjoints, which more evenly distributesstress loads. The result is a robustmachine that delivers the durabilityyou expect from Caterpillar.

Rear Frame Structure. The box-sectionedhitch design helps resist torsion loadsand ensure structural durability.The integrated bumper ties the rearframe together as a single, solid unit,so the frame can withstand heavy-dutyapplications such as ripping andwinging snow.

Articulation Hitch. A large taperedroller bearing at the lower pivot carriesloads evenly and smoothly. This joint issealed to prevent contamination in thiscritical area.

A mechanical locking pin preventsframe articulation to help ensure safetywhen servicing or transporting themachine.

Circle Construction. Our one-pieceforged steel circle is built to stand up tohigh stress loads and provide structuraldurability. The front 240° of circle teethare hardened to reduce wear and ensurecomponent reliability.

Drawbar Construction. The A-framedrawbar features a tubular design forhigh strength and optimum durability.

Aggressive Blade Angle.With a longwheelbase the operator can obtainaggressive moldboard angles, so materialrolls more freely along the length of theblade. This is particularly helpful whenhandling very dry materials or cohesivesoils. Better material control gets thejob done faster, requires less powerand saves fuel.

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Durable structures with fast and simple DCM adjustments deliver precise material controlwhile lowering operating costs.

Structures, Drawbar, Circle and Moldboard

Top-Adjust Drawbar Wear Strips.The patented top-adjust wear stripsdramatically reduce drawbar/circleadjustment time. By removing theaccess plates on top of the drawbar,shims and wear strips can easily beadded or replaced. This feature reducesservice downtime and lowers overallmachine operating costs.

Replaceable Wear Inserts. Tough,durable nylon composite wear insertsreduce rotational friction for maximumcircle torque and longer component life.They are located between the drawbarand circle, and between the supportshoes and circle. High load-resistantbrass wearstrips are placed between theblade mounting group and moldboard.This sacrificial wear system can bereplaced easily and helps keepcomponents tight for fine grading.

Moldboard. The optimal curvatureand large throat clearance help movematerial quickly and efficiently.Heat-treated moldboard rails, hardenedcutting edges and end bits, and largediameter bolts assure reliability andlonger service life. The moldboard sideshift cylinder is positioned on the leftside to eliminate snow wing interference.

Moldboard Positioning. The blade linkbar design extends the possibilities formoldboard positioning, most beneficialin mid-range bank sloping and in ditchcutting and cleaning.

Shimless Moldboard Retention System.The unique shimless moldboardretention system reduces the potentialfor blade chatter. Vertical and horizontaladjusting screws keep the moldboard’swear strips aligned for precise bladecontrol and dramatic reductions inservice time.

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Top-adjust drawbar wear strips

Shimless moldboard retention system with adjusting screws

Smooth Shifting Transmission. The 120Mcombines several key innovations toensure smooth, powerful shifts throughoutthe gear range.

Electronically Controlled Shifting.The full Electronic Clutch PressureControl (ECPC) system optimizesinching modulation and smooths shiftingbetween all gears and directionalchanges. This provides outstandingcontrol and also extends the life of thetransmission by reducing stress on gears.

Load Compensation. This standardfeature ensures consistent shift qualityregardless of blade or machine load.

Controlled Throttle Shifting. This standardfeature helps to smooth directional andgear changes without use of theinching pedal.

Engine Over-Speed Protection.Helps protect the transmission andextend component life by preventingdownshifting until a safe travel speedhas been established.

Power Shift Countershaft Transmission.Designed and manufactured specificallyfor the 120M motor grader, the directdrive countershaft transmission ismatched with the powerful Cat C6.6engine to maximize power to the ground.

Modular Rear Axle. The 120Mincorporates a bolt-on modular rearaxle design, which offers easy accessto differential components, improvesserviceability and contaminationcontrol, and lowers maintenance timeand operating costs. The result is arugged machine you can rely on foryears to come.

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Integrated, electronically controlled systems, deliver smooth reliable performancewith reduced operating costs.

Power Train

Front Axle. The Cat sealed spindle keepsthe bearings free from contaminantsand lubricated in a light-weight oil (1).This durable, low-maintenance designreduces your owning and operating costs.Two tapered roller bearings (2) supportthe wheel spindle. The Cat “Live Spindle”design places the larger tapered rollerbearing outboard where the load isgreater, extending bearing life.

Gear Selection. Eight forward andsix reverse gears give the operator awide operating range. The specificallydesigned range of gears ensuresmaximum productivity in allearthmoving applications.

Programmable Autoshift. The operatorcan easily customize various shiftparameters through Cat Messengerto match the specific applicationrequirement. This feature automaticallyshifts the transmission at optimal pointsso the operator can focus on the work,improving safety, productivity andease of operation.

Inching Pedal. Allows precise controlof machine movements in any gearwith low pedal effort and excellentmodulation, critical in close-quarterwork or finish grading.

Hydraulic Brakes. The oil bathed,multi-disc service brakes arehydraulically actuated (1), providingsmooth predictable braking and loweroperating costs. With brakes located ateach tandem wheel, the 120M offersthe largest total brake surface area inthe industry (2), delivering dependablestopping power and longer brake life.

Brake Serviceability and Reliability.An easily accessible brake wearindicator/compensator system (3)maintains consistent brake performanceand indicates brake wear withoutdisassembly. This system cuts servicetime and extends brake service life.

Parking Brake. The spring-applied,hydraulically released multi-discparking brake is a sealed, oil-cooleddesign extending component life andreducing the need for service. The parkingbrake is integrated into the OperatorPresence System to prevent unintendedmachine movement.

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ACERT™ Technology. ACERTTechnology allows Cat enginesto supply more power per unit ofdisplacement without causing prematurewear. This breakthrough technologyreduces emissions during the combustionprocess by using advanced technology inthe air and fuel systems, in conjunctionwith integrated electronics. ACERTTechnology enhances overall engineperformance while dramaticallyreducing exhaust emissions.

Fuel Delivery. The C6.6 engine withACERT Technology uses multipleinjection fuel delivery to precisely shapethe combustion cycle. Several smallignitions lower combustion chambertemperatures, generates fewer emissionsand optimizes fuel combustion. Bottomline: more work output for your fuel cost.

Power Management. The 120M PowerManagement System automaticallydelivers an additional five horsepowerin each forward gear 1st through 4th,and each reverse gear 1st through 3rd.This standard feature optimizes rimpullfor all gears by balancing traction,speed and horsepower while conservingfuel. The system limits horsepower inlower gears, which helps reduce wheelslip where traction is limited. With theVariable Horsepower Plus (VHP Plus)option, an additional five-horsepoweris delivered in each forward gear 5th

through 8th for more power athigher speeds.

Performance. The Cat C6.6 engine meetsspecific performance requirements for120M applications. Its superior torqueand lugging capability can pull throughsudden, short-term increases in loads,maintaining consistent, desirablegrading speeds to get the work donefaster without downshifting.

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

Exhaust Emissions Certified.The Cat C6.6 with ACERT Technologymeets or exceeds all U.S. EPA Tier 3and European Union Stage IIIaemissions control standards.

EngineThe 120M combines power management with ACERT™ Technology to deliver maximumpower and efficiency while reducing the environmental impact.

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Advanced Electro-Hydraulic System.The 120M incorporates a state-of-the-artelectro-hydraulic system. This technologyis the foundation for revolutionarychanges of the machine and implementcontrols. Advanced joystick controlsprovide unmatched controllability withprecise, predictable hydraulic movementsand the reliability you expect fromCaterpillar.

Blade Float. Blade float is built into theblade lift control valves and is optionalfor some auxiliary hydraulic functions.The blade float feature allows the bladeto move freely under its own weight.By floating both cylinders, the bladecan follow the contours of the roadwhen removing snow. Floating onlyone cylinder permits the toe of theblade to follow a hard surface whilethe operator controls the slope withthe other lift cylinder.

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

Load Sensing Hydraulics (PPPC).The time proven load-sensing systemand the advanced Proportional PriorityPressure-Compensating (PPPC, or“triple-PC”) electro-hydraulic valveson the 120M are designed to providesuperior implement control and enhancedmachine performance in all applications.Continuous matching of hydraulic flowand pressure to power demands createsless heat and reduces powerconsumption.

Cat® XT™ Hose. Cat hose technologyallows high pressures for maximumpower and reduced downtime.Intelligent routing minimizes exposureto damage. Hose clips prevent hoserubbing and excessive vibration forlower owning and operating costs.

Balanced Flow. Hydraulic flow isproportioned to ensure all implementsoperate simultaneously with little effecton the engine or implement speeds.If demand exceeds pump capacity,all cylinder velocities are reduced bythe same ratio. The result is improvedproductivity in all applications.

Consistent and Predictable Movement.PPPC valves have different flow ratesfor the head (red) and rod ends (blue)of the cylinder. This ensures consistentextension and retraction speeds foreach cylinder, and gives the operator aconsistent and predictable response everytime an implement control is moved.

Predictable movements

HydraulicsThe 120M electro-hydraulics enable advanced machine controls with precise andpredictable movements.

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Full systems integration optimizes machine performance and availability.

Integrated Electronic Solutions

“Smart Machine”. The 120M fullyintegrates all core systems creating a“Smart Machine.” The Cat data linkshares key data among systems,optimizing machine performance whilepreventing potential machine damage.

Diagnostics. Cat Messenger, combinedwith full systems integration, enhancesthe diagnostic capability of the 120M.Machine system errors are displayedin text as well as with fault codes,allowing service technicians andoperators to quickly analyze criticaldata, increasing machine availability.

Optional Automatic Blade Control.The Cat AccuGrade System automaticallycontrols the blade, improving operatorefficiency and productivity. AccuGrade™technology reduces the need for traditionalsurvey stakes or grade checkers, so youcan reach grade faster and in fewerpasses than ever before.

AccuGrade Attachment Ready Option.The AccuGrade System is fully integratedinto the machine design, makinginstallation quick and easy. Integralhydraulic and electrical components arestandard on the 120M (Grade ControlReady). The AccuGrade AttachmentReady Option provides additionalmounting brackets, cab controls andelectrical harnesses for easy installationof the Cross Slope, Sonic, Laser, GPSor ATS electronics kits.

Product Link. Product Link streamlinesdiagnostic efforts, and reduces downtime,maintenance scheduling and costsby providing a communication flowof vital machine data and location.Product Link gives automatic updateson machine parameters such as machinehours, machine condition, location,fault codes and alarms directly to youroffice computer.

120M with AccuGrade™ System

Electronic Technician (Cat ET). Cat ETis a two-way communication tool thatgives service technicians easy accessto stored diagnostic data and lets themconfigure the machine parametersthrough the Cat Data Link. This integratedfeature reduces machine downtime andlowers operating costs.

Cat Messenger. Standard on the 120M,Cat Messenger provides real-timemachine performance and diagnosticdata with an easy-to-use interface.Messenger monitors all system data andalerts the operator of any faults througha digital text display that can be shownin multiple languages.

Low Battery Elevated Idle. After the120M is at low idle for an extendedperiod and low system voltage is detected,idle speed is raised. This ensuresadequate system voltage and improvesbattery reliability.

Automatic Engine Deration. Protects theC6.6 engine by automatically loweringengine torque output and alerting theoperator if critical conditions are detected. Machine Security System (MSS).

The optional MSS uses electronicallycoded keys to limit usage by specificindividuals or times of the day.MSS deters theft, vandalism andunauthorized use.

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All Wheel Drive (AWD) System.The optional AWD system utilizesdedicated left and right pumps forprecise hydraulic control. The infinitelyvariable pumps and motors maximizetorque in each gear delivering the mostpower to the ground in the industry andincreasing productivity in the mostdemanding applications.

Precise control

AWD – Maximum Net Power.When equipped with AWD, the 120Mwill automatically increase power upto 26 kW (35 hp) when the systemis engaged. This offsets the parasiticlosses and maximizes net power tothe ground for increased productivity.

AWD – Hydrostatic Mode. Standardwith AWD, this mode disengages thetransmission and provides hydraulicpower to the front wheels only.The ground speed is infinitely variablebetween 0-8 km/h (0-5 mph), perfectfor precise finish work.

AWD – Steering Compensation.The Cat Steering CompensationSystem is standard with All WheelDrive. This feature enables a “poweredturn” by adjusting the outside front tirespeed up to 50% faster than the insidetire. The result is improved control,less damage to surfaces and a dramaticreduction of turning radius in poorunderfoot conditions.

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The AWD, Work Tools and optional attachments for the 120M expand machine versatility,utilization and performance.

All-Wheel Drive, Work Tools and Attachments

Moldboard Options. A 3.7 m (12 ft)moldboard is standard on the 120M,with an optional 4.3 m (14 ft) moldboardavailable from the factory. Left sidemoldboard extensions are also available,increasing versatility.

Ground Engaging Tools (GET). A widevariety of Cat GET is available on the120M, including cutting edges, graderbitsand end bits, all designed for maximumservice life and productivity.

Front Mounted Groups. A front mountedpush plate/counterweight or front liftgroup can be ordered on the 120M.The Cat Work Tools front lift groupcan be combined with a front dozer bladeor front scarifier for added versatility.

Snow Removal Work Tools. Cat WorkTools offer a variety of snow removalequipment specifically for the 120M.Multiple snow plow, snow wing andmounting options are available, addingadditional machine versatility andutilization throughout the year.

Air Compressor. An optional aircompressor is available, giving you aconvenient on-board air system to blowdebris off the machine and operatepower tools.

Rear Ripper/Scarifier. The 120M optionalripper is made to penetrate tough materialfast and rip thoroughly for easiermaterial movement with the moldboard.The ripper includes three shanks withthe ability to add two more if needed.Nine scarifier shanks can also be addedfor additional versatility.

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Operator Presence System. The OperatorPresence System keeps the parkingbrake engaged and hydraulic implementsdisabled until the operator is seated andthe machine is ready for safe operation.

Secondary Steering System. The standardsecondary steering system automaticallyengages an electric hydraulic pump incase of a drop in steering pressure,allowing the operator to steer themachine to a stop.

Speed Sensitive Steering. The steeringsoftware automatically provides aninfinitely variable ratio between thejoystick and the steer tires, resultingin less sensitive steering as the groundspeed increases.

Low Sound and Vibration Levels.Isolation mounts for the cab, engineand transmission maximize operatorcomfort and help to minimize soundand vibration. These modificationsprovide a quieter and more comfortableworking environment, optimizingoperator focus.

Hydraulic Lockout. A simple switchlocated in the cab disables all implementfunctions while still providing machinesteering control. This safety feature isespecially useful while the machineis roading.

Brake Systems. Brakes are located ateach tandem wheel to eliminate brakingloads on the power train. In addition,the brake systems are redundant andutilize accumulators to enable stoppingin case of machine failure, furtherincreasing operational safety.

Circle Drive Slip Clutch. This standardfeature protects the drawbar, circle andmoldboard from shock loads when theblade encounters an immovable object.It also reduces the possibility of abruptdirectional changes in poor tractionconditions, protecting the machine,operator and surroundings.

Drop-Down Rear Lights. Optional drop-down lights fold out from the rear of themachine. This creates a wider, lowerprofile to be better aligned withpassenger cars.

Rearview Camera. Visibility is furtherenhanced with an optional Work AreaVision System (WAVS) through a178 mm (7 in) LCD color monitor inthe cab. Developed specifically forrugged applications, this durable cameraimproves productivity and increasesoperator awareness of surroundings.

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Safety is an integral part of all machine and system designs.

Safety

Steel Tandem Walkways. Perforatedraised steel walkways cover the tandems.This provides a sturdy platform forstanding and walking, and additionalprotection for the brake lines.

ROPS/FOPS Cab. Isolation mountedto the frame to reduce vibration andsound, the integral ROPS/FOPSstructure meets ISO and SAE criteriafor operator protection.

Blade Lift Accumulators. This optionalfeature uses accumulators to help absorbimpact loads to the moldboard byallowing vertical blade travel. Blade liftaccumulators reduce unnecessary wearand help to avoid unintended machinemovement for increased operator safety.

Engine Shutoff Switch. An engineshutoff switch is located at ground levelon the left rear of the machine, allowinganyone nearby to shut it down in case ofan emergency.

Electrical Disconnect Switch. A batterydisconnect switch, located inside theleft rear enclosure, provides ground-level lockout of the electrical systemto prevent inadvertent starting ofthe machine.

Fenders. To help reduce objects flyingfrom the tires, as well as build-up ofmud, snow and debris, optional fenderscan be added.

Additional Safety Features. The 120Mhas many additional standard safetyfeatures, including laminated glass onthe front windows and doors, lockabledoors, back-up lights and soundingalarm, black glare-reducing paint onthe front frame and engine enclosure,and conveniently located grab rails foradded safety.

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Grouped Service Points. The 120Mgroups daily service points in the leftside service center to help ensure propermaintenance and inspection routines.

Extended Service Intervals.The 120M extended service intervals,such as 500-hour engine oil changesand 4000-hour hydraulic oil changes,reduce machine service time andincrease availability.

Ecology Drains. Conveniently locatedecology drains shorten service timesand help keep the environment safeby preventing spills.

Diagnostics and Monitoring.The 120M integrates Cat Messenger,Cat Electronic Technician and S•O•SSM

Sampling Ports for easy monitoringand fast troubleshooting, keeping yourmachine up and running.

Machine Selection.Make detailedcomparisons of the machines underconsideration before purchase. Cat dealershelp you size the right machine for youroperations and can estimate componentlife, preventative maintenance cost, andthe true cost of production.

Purchase. Consider the financingoptions available, as well as day-to-dayoperating costs. Look at dealer servicesthat can be included in the cost of themachine to yield lower equipment owningand operating costs over the long run.

Maintenance Services. Repair optionprograms guarantee the cost of repairsup front. Diagnostics programs such asScheduled Oil Sampling, S•O•SSM

analysis, Coolant Sampling and TechnicalAnalysis help avoid unscheduled repairs.

Product Support. You will find nearlyall parts at our dealer parts counter.Cat dealers use a world-wide computernetwork to track in-stock partsto minimize machine down time.Save money with genuine Cat Remanparts. You receive the same warrantyand reliability as new products atsubstantial cost savings.

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Serviceability and Customer SupportSimplified service, world-class product support and Cat® dealer-trained experts keep yourfleet up and running, maximizing your equipment investment.

21120M/120M AWD Motor Grader specifications

Std – Fan speed – max 1,150 rpmStd – Fan speed – min 600 rpmStd – Ambient Capability 43° C 109° FHi Ambient – Fan speed – max 1,650 rpmHi Ambient – Fan speed – min 600 rpmHi Ambient Capability 50° C 122° F

• Max torque (VHP Plus) measured at 1,000 rpm.

• 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 attachment for tandem-drive machines.

• Max torque (VHP Plus) measured at 1,400 rpm.

• Net power advertised is the power available at rated speedof 2,000 rpm, measured at the flywheel when engine isequipped with fan running at minimum speed, air cleaner,muffler and alternator.

• No engine derating required up to 3505 m (11,500 ft).

Engine

Engine Model Cat® C6.6 ACERT™ VHPBase Power (1st gear) – Net 103 kW 138 hpVHP range – Net 103-114 kW 138-153 hpVHP Plus range – Net 103-136 kW 138-182 hpDisplacement 6.6 L 403 in3

Bore 105 mm 4.13 inStroke 125 mm 4.92 inTorque rise (VHP Plus) 40%Max torque (VHP Plus) 906 N·m 668 lb ftSpeed @ rated power 2,000 rpmNumber of cylinders 6Derating altitude 3505 m 11,500 ft

Power Train

Forward/Reverse Gears 8 Fwd/6 RevTransmission Direct drive, power shift,

countershaftBrakes – Service Multiple oil-discBrakes – Service, surface area 23 000 cm2 3,565 in2

Brakes – Parking Multiple oil discBrakes – Secondary Dual circuit control system

Hydraulic System

Circuit type Electro-hydraulic loadsensing, closed center

Pump type Variable pistonPump output 151 L/min 40 gal/minMaximum system pressure 24 100 kPa 3,500 psiStandby Pressure 3100 kPa 450 psi

• Pump output measured at 2,150 rpm

All-Wheel Drive System (Optional)

AWD HP Range – Net* 110-144 kW 148-193 hpMotor Type 2 Variable axial pistonPump Type 2 Variable pistonMaximum Torque 13 998 N·m 10,325 ft-lbOperational gears Forward = 1-7

Reverse = 1-5

* AWD Net power is an incremental increase per gear rangingfrom 7-26 kW (10-35 hp), depending on selected gear.

120M Net PowerVHP VHP Plus

Gear kW (hp) – Net kW (hp) – NetFwd. 1st 103 (138) 103 (138)

2nd 106 (143) 106 (143)3rd 110 (148) 110 (148)4th 114 (153) 114 (153)5th 114 (153) 118 (158)6th 114 (153) 121 (163)7th 114 (153) 125 (168)8th 114 (153) 136 (182)

Rev. 1st 103 (138) 103 (138)2nd 106 (143) 106 (143)3rd – 6th 110 (148) 110 (148)

Tandems

Height 502 mm 19.76 inWidth 171.7 mm 6.76 inSidewall thickness – inner 14 mm 0.5 inSidewall thickness – outer 16 mm 0.6 inDrive chain pitch 44.5 mm 1.8 inWheel axle spacing 1510 mm 59.5 inTandem oscillation – front up 15°Tandem oscillation – front down 25°

Moldboard

Blade width 3.668 m 12 ftMoldboard – height 610 mm 24 inMoldboard – thickness 22 mm 0.87 inArc radius 413 mm 16.3 inThroat clearance 123.9 mm 4.9 inCutting edge – width 152.4 mm 6 inCutting edge – thickness 16 mm 0.6 inEnd Bit – width 152.4 mm 6 inEnd Bit – thickness 16 mm 0.6 inBlade Pull – base GVW 9230 kg 20,350 lbBlade Pull – max GVW 10 985 kg 24,218 lbBlade Pull – base GVW (AWD) 13 881 kg 30,603 lbBlade Pull – max GVW (AWD) 15 887 kg 35,024 lbDown Pressure – base GVW 7455 kg 16,435 lbDown Pressure – max GVW 13 211 kg 29,125 lb

• Blade pull calculated at 0.9 traction coefficient, which isequal to ideal no-slip conditions, and Gross Machine Weight.

Blade Range

Circle centershift – right 656 mm 25.8 inCircle centershift – left 656 mm 25.8 inMoldboard sideshift – right 660 mm 26 inMoldboard sideshift – left 510 mm 20.1 inMaximum blade position angle 90°Blade tip range – forward 40°Blade tip range – backward 5°Maximum shoulder reach outside of tires

– right 1905 mm 75 in– left 1742 mm 68.6 in

Maximum lift above ground 427 mm 16.8 inMaximum depth of cut 720 mm 28.3 in

Operating Specifications

Top Speed – Fwd. 45.7 km/h 28.4 mphTop Speed – Rev. 36.1 km/h 22.4 mphTurning radius, outside front tires 7.34 m 24 ft 1 inSteering range – left/right 47.5°Articulation angle – left/right 20°Fwd. 1st 3.9 km/h 2.4 mphFwd. 2nd 5.3 km/h 3.3 mphFwd. 3rd 7.6 km/h 4.75 mphFwd. 4th 10.5 km/h 6.5 mphFwd. 5th 16.4 km/h 10.2 mphFwd. 6th 22.8 km/h 14.2 mphFwd. 7th 31.4 km/h 19.5 mphFwd. 8th 45.7 km/h 28.4 mphRev. 1st 3.3 km/h 2 mphRev. 2nd 6.2 km/h 3.8 mphRev. 3rd 8.9 km/h 5.6 mphRev. 4th 13.2 km/h 8.2 mphRev. 5th 24.8 km/h 15.4 mphRev. 6th 36.1 km/h 22.4 mph

Service Refill

Fuel Capacity 341 L 90 galCooling system 33 L 8.7 galHydraulic system – tank 64 L 16.9 galEngine Oil 14 L 3.7 galTrans./Diff./Final Drives 62.5 L 16.5 galTandem housing (each) 59 L 15.6 galFront wheel spindle 0.5 L 0.1 galbearing housingCircle drive housing 7 L 1.8 gal

Frame

Circle – diameter 1530 mm 60.2 inCircle – blade beam thickness 35 mm 1.4 inDrawbar – height 152 mm 6 inDrawbar – width 76.2 mm 3 inDrawbar – thickness 9.5 mm 0.4 inDrawbar – yoke bar thickness 19.1 mm 0.75 inFront frame structure

– height 254 mm 10 in– width 254 mm 10 in– thickness 16 mm 0.6 in

Front axle – height to center 572 mm 22.5 in– wheel lean, left/right 18°– total oscillation per side 32°

22 120M/120M AWD Motor Grader specifications

120M/120M AWD Motor Grader specifications 23

Weights

Gross Vehicle Weight – base– total 14 466 kg 31,891 lb– front axle 4209 kg 9,280 lb– rear axle 10 256 kg 22,611 lb– total with AWD 15 424 kg 34,003 lb

Gross Vehicle Weight – max – total 20 271 kg 44,690 lb– front axle 7460 kg 16,446 lb– rear axle 12 811 kg 28,244 lb

• Base operating weight calculated on standard machineconfiguration with 13.00 24 12PR (G-4) tires, full fuel tank,coolant, lubricants and operator.

Standards

ROPS/FOPS ISO 3471:1992/ISO 3449:1992Steering ISO 5010:1992Brakes ISO 3450:1996Sound ISO 6394:1998/ISO 6395:1988

• The static sound operator pressure level measuredaccording to ISO 6394:1988 for a cab offered by Caterpillar,when properly installed, maintained and tested with doorsand windows closed and hydraulic fan at maximum speedis 70 dB(A).

• The dynamic spectator sound power level for the standardmachine when equipped with sound suppression packageand hydraulic fan running at 70% of maximum speed,machine sound measured is less than 105 dB(A), complyingwith EU 2000/14/EC requirement.

Ripper

Ripping depth, maximum 428 mm 17 inRipper shank holders 5Ripper shank holder spacing 533 mm 21 inPenetration force 8031 kg 17,705 lbPryout force 11 931 kg 26,303 lbMachine length increase, 995 mm 39.2 inbeam raised

Scarifier

Front, V-Type, 5 or 11 toothWorking width 1205 mm 47.4 inScarifying depth, maximum 467 mm 18.4 inScarifier shank holders 5/11Scarifier shank holder spacing 116 mm 4.6 in

Mid, V-Type Working width 1184 mm 46.6 inScarifying depth, maximum 292 mm 11.5 inScarifier shank holders 11Scarifier shank holder spacing 116 mm 4.6 in

Mid, straightWorking width 1800 mm 71 inScarifying depth, maximum 317 mm 12.5 inScarifier shank holders 17Scarifier shank holder spacing 111 mm 4.4 in

DimensionsAll dimensions are approximate, based on standard machine configuration with 13.00-24 12PR (G-2) tires.

1 Height – top of cab 3308 mm 130 in2 Height – front axle center 572 mm 22.5 in3 Length – between tandem axles 1511 mm 59.5 in4 Length – front axle to moldboard 2511 mm 98.9 in5 Length – front axle to mid tandem 5915 mm 232.8 in6 Length – front tire to rear of machine 8488 mm 334.1 in7 Length – counterweight to ripper 9889 mm 389.3 in

8 Ground clearance at rear axle 347 mm 13.6 in9 Height to top of cylinders 2920 mm 115 in10 Height to exhaust stack 2885 mm 113.6 in11 Width – tire center lines 2136 mm 84.1 in12 Width – outside rear tires 2512 mm 98.9 in13 Width – outside front tires 2531 mm 99.6 in

2

91

8

10

43

5

11

12

13 6

7

24 120M/120M AWD Motor Grader specifications

Optional Tire ArrangementsTotal machine width and changes in machine weight are shown for common tire options.

Wheel Outside Front Tires Outside Rear Tires Tire Arrangement Group Tires Width Width Weight

9x24 SP 13 .00-24 Firestone SGG RB 12PR 2531 mm 99.6 in 2512 mm 98.9 in 0 kg 0 lb10x24 MP 14.00-24 Goodyear SGG-2A 12PR 2562 mm 100.9 in 2543 mm 101.1 in 323 kg 712 lb9x24 SP 14.00R24 Michelin XGLA2 1 Star 2553 mm 100.5 in 2534 mm 99.8 in 272 kg 600 lb10x24 MP 14.00R24 Michelin XGLA2 1 Star 2567 mm 101.1 in 2548 mm 100.3 in 427 kg 941 lb14x25 MP 17.5R25 Michelin XTLA 1 Star 2758 mm 108.6 in 2739 mm 107.8 in 596 kg 1314 lb14x25 MP 17.5R25 Bridgestone VKT 1 Star 2734 mm 107.6 in 2715 mm 106.9 in 795 kg 1753 lb

• Based off the standard arrangement, AWD arrangements will have between 113 mm (4.4 in) – 309 mm (12.2 in) additional width.

25120M/120M AWD Motor Grader specifications

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

ELECTRICALAlarm, back upAlternator, 80 ampere, sealedBatteries, maintenance free, heavy duty 1125 CCABreaker panel, ground accessibleElectrical system, 24VGrade Control Ready – Cab harness, software,electrical hydraulic valves, bosses and brackets

Lights, reversingLights, roading, roof-mountedProduct Link ReadyLights, stop and tail, LEDStarter, electric

OTHER STANDARD EQUIPMENTBrake accumulators, dual certifiedBumper, rear, integrated with hitchCD ROM Parts BookClutch, circle drive slipCutting edgescurved DH-2 steel152 mm � 16 mm (6 in � 5/8 in)19 mm (3/4 in) mounting bolts

Doors (3), engine compartment, lockingDrawbar – 4 shoes with replaceable wear stripsEndbits16 mm (5/8 in) DH-2 steel19 mm (3/4 in) mounting bolts

Extended Life Coolant to –35° C (–30° F)Fluid check, ground levelFrame, articulated, with safety lockFuel tank, ground level accessGround level engine shutdownHammer (emergency exit)Horn, electricHydraulics, base 8 implement controlsHydraulics, load-sensingLockout, hydraulic implement for roadingMoldboard3658 mm � 610 mm � 22 mm (12 ft � 24 in � 7/8 in)hydraulic sideshift and tip

Mounting, cab roof accessoriesPaint, glare reducing – top of front frame and rear enclosurePump, hydraulic, high capacity (99cc/6 in3)Radiator cleanout accessSecondary steeringServiceability, LH sideS•O•SSM ports: engine, hydraulic, transmission, coolant, fuelTandem walkway/guardsTool boxTow hitch

TIRES, RIMS, & WHEELSPartial allowance for tires and multi-piece rims

OPERATOR ENVIRONMENTAir Conditioner with heaterArm and wrist rest, adjustableArticulation, automatic Return-to-CenterAshtray and lighterCat Messenger, operator information systemCentershift pin indicatorCoat hookCup holderDisplay, digital speed and gearDoors, left and right side with wiperGauge cluster – articulation, engine coolant temp,engine RPM, fuel, system voltage

Gauge, machine levelHour meter, digitalJoystick hydraulic controlsimplements, steering, transmission

Ladders, cab, left and right sideLights, night time cabMirror, inside rearview, wide anglePower port, 12VRadio Ready, EntertainmentROPS cab, sound suppressedSeat belt, retractable 76 mm (3 in)Seat, cloth-covered, comfort suspensionStorage area for cooler/lunchboxThrottle control, electronicWindows, laminated glass:fixed front with intermittent wiperside and rear (3)

POWER TRAINAir cleaner, dual stage, dry type, automatic dust ejector,service indicator through Cat Messenger

Air-to-air after cooler (ATAAC)Belt, serpentine, automatic tensionerBrakes, four-wheel hydraulicDifferential, lock/unlockDrain, engine oil, ecologyElectronic over speed protectionEngine, Cat® C6.6 with ACERT™ TechnologyFuel-water separatorHydraulic demand fanMuffler, under hoodParking brake – multi-disc, sealed, oil-cooledPriming pump, fuelRear axle, modularSediment drain, fuel tankTransmission, 8F/6R, power shift, direct driveVHP (Variable Horsepower)VHP Plus (Variable Horsepower Plus) – AWD Model

26 120M/120M AWD Motor Grader specifications

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

kg lb

OTHER ATTACHMENTSAccuGrade ARO 41 90Accumulators, Blade Lift 77 170Camera, Rearview 7 15Cat Product Link 321SR 13 29Compressor/Tank, Air 18 40Fenders, Front, AWD 56 124Fenders, Rear 163 360Heater, Engine Coolant:120V 0.5 1240V 1 3

Hydraulic Arrangements with One or MoreAdditional Hydraulic Valves are Availablefor Rear Ripper, Blade, Mid Mount Scarifier,Front Lift Group, Snow Plow and Snow Wing.Security System 5 10Snow Wing Mounting, Frame Ready 104 229Starting Aid, Ether 0.5 1

WORK TOOLS/G.E.T.Blade Extension, 610 mm (2 ft)Left Hand 113 250

Cutting Edges, Curved 18 40Drawbar, 6 Shoe Circle Guide 82 180Endbits, Overlay 24 52Front Lift Group, Manual 680 1,500Mid Mount Scarifier 939 2,071Moldboard4267 mm � 610 mm � 22 mm (14 ft � 24 in � 7/8 in)4267 mm � 686 mm � 25 mm (14 ft � 27 in � 1 in)

Push Plate, Counterweight 885 1,950Ripper/Scarifier, Rear 998 2,200Ripper, Tooth 30 67Scarifier, Front 434 956 Scarifier, Tooth 69 152

MACHINE ARRANGEMENTSCanadian ArrangementEuropean ArrangementRoading Arrangement, EuropeanSnow Arrangement

kg lb

ELECTRICALAlternator, 150 Ampere 2 5Batteries:Extreme Duty, 1400 CCA 44 96Heavy Duty, 1125 CCA 18 40

Converter, Communication (CB) 2 5Lights:5 Lighting Arrangements, including rear roading, drop down

Warning, LED strobe 1 2

GUARDSCovers, Screen 4 9Debris 9 20Transmission Sides/Sound 76 167Transmission 133 293

OPERATOR ENVIRONMENTFan, Defroster, Rear Window 2 4Mirrors, Outside:Heated 24V 15 33Mounted 15 32

Seat, Air Suspension, Cloth 5 10Shade, Sun 4 9Wiper, Each Side 0 1Wiper/Washer, Rear 0 1

POWER TRAINAll Wheel Drive 680 1,500Engine, Variable Horsepower Plus (VHP Plus)Precleaner, Sy-Klone 2 5Transmission, Autoshift 2 5

Note: Not all attachments are available in all regions.

27120M/120M AWD Motor Grader specifications

Notes

For more complete information on Cat products, dealer services, and industry solutions, visit us on the web atwww.cat.com

© 2010 CaterpillarAll Rights Reserved

Printed in U.S.A.

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

See your Cat dealer for available options.

CAT, CATERPILLAR, ACERT, AccuGrade, XT, SAFETY.CAT.COM, their respective logos,“Caterpillar Yellow” and the “Power Edge” trade dress, as well as corporate and product

identity used herein, are trademarks of Caterpillar and may not be used without permission.

AEHQ5729-03 (09-10)

Replaces AEHQ5729-02

120M/120M AWD Motor Grader