Specalog for D6N Track-Type Tractor, AEHQ5742-01

®®

EngineEngine Model Cat® C6.6 ACERT™Flywheel Power 111.8 kW 150 hp

WeightsOperating Weight – XL 16 605 kg 36,610 lbOperating Weight – LGP 17 791 kg 39,222 lb

D6NTrack-Type Tractor

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D6N Track-Type Tractor

Engineered to excel on the most demandingwork sites. Combining power, ruggedcomponents and superior balance, theversatile D6N is designed for toughworking conditions. It keeps materialmoving with the reliability and durabilityyou expect from Caterpillar® machines.

Work Tools

Caterpillar offers a variety bladedesigns and other work tools to tacklevirtually any job quickly and efficiently.pg. 14

SystemOne Undercarriage

Designed exclusively by Caterpillarfor Cat® Machines, SystemOneUndercarriage extends undercarriagesystem life, improves reliability andreduces Owning and Operating costs.pg. 13

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Drive Train

The new Multi Velocity Program(MVP) enhances the capability andperformance of the Powershifttransmission. Now, 5 speed ranges areavailable to match a wider range ofoperating conditions and applicationrequirements. pg. 6

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Differential Steering

This dependable system maintainspower to both tracks while turning.Simultaneous control of speed, directionand steering with the tiller bar controllerdelivers maximum productivity. pg. 5

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Engine

The Cat® C6.6 engine meets stringentTier 3/Stage IIIA emission standardswhile providing outstanding engineperformance, fuel efficiency andlong-term durability. pg. 4

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✔ New Feature

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Total Customer Support

Your Cat® Dealer offers a wide rangeof services that can be set up under aCustomer Support Agreement when youpurchase your equipment. The dealerwill help you choose a plan that cancover everything from machine andattachment selection to replacement-helping get the best return oninvestment. pg. 17

Serviceability

The time between PM service intervalshas been increased allowing moreup-time. All major components, filters,and lube points are easily accessible andmodular in design. The updated EMS IIImachine monitoring system has increaseddiagnostic capabilities. pg. 16

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Structure

Steel castings and heavy steel plates arewelded to insure a rigid one piece caseand frame structure. Bolted soft mountedcab supports reduce sound level andvibration. Fuel tank rubber isolationmounts eliminate vibration and reducestress. pg. 12

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AccuGrade ™ Laser and GPS MachineControl and Guidance Systems

AccuGrade Laser and GPS systems canbe easily installed on the AccuGradeARO (Attachment Ready Option)equipped machine. pg. 10

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Operator Station

Redesigned Operator station providesimproved visibility and reduces soundand vibration levels. Standard AirConditioning and C500 Air SuspendedSeat provide outstanding comfort tothe operator. pg. 8

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Cat® C6.6 Engine with ACERT™Technology. The Cat® C6.6 is a 6.6 liters(403 in3) displacement, six cylinder,inline configured engine equipped witha Caterpillar Common Rail fuel System.It uses ACERT Technology, a series ofCaterpillar engineered innovations thatprovide advanced electronic control,precision fuel delivery and refined airmanagement, resulting in outstandingperformance and lower emissions.The Cat C6.6 with ACERT Technologymeets the U.S. EPA Tier 3, EuropeanUnion Stage IIIA and Japan MOCStep 3 emissions standards.

Design. The C6.6 features a compactdesign with heavy-duty engine featuresfor outstanding durability, reliabilityand performance. The C6.6 incorporatesa new cross flow cylinder head design,a 4 valve head and an ADEM™ A4electronic controller.

Electronic Controls. The C6.6 enginesuse advanced electronic controllers,which have a proven track record forperformance and reliability. ADEM A4Electronic Control Module (ECM)receives data from engine-mountedsensors and adjusts critical parametersto maintain optimum performance.These adjustments also optimize fueleconomy and emissions compliance.Electronics also make engines easierto troubleshoot and repair

Fuel Delivery. Fuel is introduced inthe combustion chamber in a numberof precisely controlled microbursts.Injecting fuel in this way allows forprecise shaping of the combustionprocess. The ADEM A4 module directsthe injectors to deliver precise quantitiesof fuel at exactly the right times duringcombustion for optimum efficiency andperformance.

Air Management. The C6.6 uses aturbocharger fitted with a smart wastegate to give precise control of theboost pressure. Over the entire engineoperating ranges the result is improved:Throttle response, Lower fuelConsumption and optimized engineperformance. A new cross-flow designin the cylinder head facilitates airmovement, while tighter tolerancesbetween the piston and cylinder linerare reducing blow by gases.

Turbocharged and Aftercooled.A well-matched turbocharger andair-to-air aftercooler results in higherpower while keeping rpm steady andexhaust temperatures low.

Electric fuel priming pump. A standardelectric fuel priming pump is locatedin the primary fuel filter base above thecombined water separator/primary fuelfilter. A switch enables to easily primethe fuel system after a fuel filter service.

D6N Drawbar Pull

Torque Rise. The direct injectionelectronic fuel system provides acontrolled fuel delivery increase asthe engine lugs back from rated speed.This results in increased horsepowerbelow rated power. A combination ofincreased torque rise and maximumhorsepower improves response,provides greater drawbar pull andfaster dozing cycles.

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EngineThe new Caterpillar® C6.6 Diesel Engine with ACERT™ Technology meets worldwideemissions requirements for EPA Tier 3, EU Stage IIIA and Japan Moc Step 3 engine exhaustemission regulations, while providing excellent performance.

Tiller Bar Control System. The tiller barcontrol system allows for simultaneouscomfortable, one-handed steering,direction and transmission control.

• The differential steering tiller barhas easy touch shift buttons forupshifts and downshifts.

• The farther the tiller bar is moved,the tighter the turn.

• To change machine direction,operators rotate the tiller barclockwise for forward orcounterclockwise for reverse.Neutral transmission position isin the middle between the two.

• Low tiller bar efforts assure operatorcomfort during long shifts.

Power Turn with Differential Steering.With differential steering, large bladeloads can be smoothly maneuveredwhile turning. The operator maintainsprecise control on slopes, aroundbuildings, bridge abutments, treesor other obstacles.

• Differential Steering has the abilityto work in tight areas by providing a“Best in Class” tight turning radius.

• Steering modulation is finely tunedfor precise control in all turningapplications.

• Regardless of ground conditions,steering is consistent because poweris maintained to both tracks duringoperation.

Differential Steering System. A planetarydifferential turns the machine by speedingup one track and slowing the otherwhile maintaining full power to both.The differential steering systemconsists of:

• Three planetary gear sets.

• A dedicated variable-displacementhydraulic pump.

• A bi-directional, fixed-displacementsteering motor.

• Heavy-duty steering drive gears.

• Two planetary gear sets (steering anddrive) make up the dual differential.

• A third planetary gear set, theequalizing planetary, resides in themain case and provides a maximum4.0 km/h (2.49 mph) speed differencebetween tracks.

Operation. When moving straight ahead,power flows through the transmissionpinion and bevel gear into the dualdifferential, transmitting equal,uninterrupted power to each final drive.While turning, power is shifted tothe outboard track speeding it up.The inboard track slows down toaccommodate a tighter turning radius.Forward ground speed remains thesame throughout the turn.

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Differential SteeringDifferential Steering maintains power to both tracks while turning. Operators havecontrol of machine speed, direction and steering with the tiller bar controller, whilemaximizing production.

Multi Velocity Program (MVP).Caterpillar’s Multi Velocity Program(MVP) allows operators to choose fromfive different speed ranges in bothforward and reverse, increasing machineproductivity, decreasing fuel consumptionand significantly reducing operating costs.

Selectable operating speeds havebeen optimized to provide the bestperformance, fuel economy anddrawbar pull. The engine speed in eachspeed range adapts automatically toprovide a smooth, comfortable andperforming machine. Operator speedranges are independently selectablein both forward and reverse from 1.5,2.0, 2.5, 3.0 and 3.5.

Auto-Shift/Auto-Kickdown. Auto-shiftallows the operator to pre-select aforward and reverse speed range foreasy, efficient directional changes.

Auto-shift settings include:

• 1.5 forward to 2.5 reverse.

• 2.5 forward to 2.5 reverse.

• 2.5 forward to 1.5 reverse.

Auto-kickdown allows the transmissionto automatically downshift whensignificant load increases are detected.

Electronic Clutch Pressure Control.The D6N has an additional transmissionshifting feature for added performanceand operator comfort – the ElectronicClutch Pressure Control (ECPC).This unique feature provides smoothershifting by regulating and modulatingthe individual clutches based on currentoperating conditions.

Steering and Transmission Controls.The D6N Differential Steering systemdelivers the control the operators needfor all applications. Soft touch buttonslocated on the steering controls shift theelectronically controlled transmission.

Torque Converter. The D6N single-stagetorque converter efficiently responds tochanging load conditions by providingtorque multiplication, therefore increasingdrawbar pull. It provides protection tothe drive train components by preventingshock loads from heavy dozingapplications. The torque converter isefficiently matched to the power traincomponents and provides the superiorperformance you need.

Transmission. The proven planetarypowershift transmission features fivespeed ranges forward and five speedranges reverse and utilizes largediameter, high capacity, oil cooledclutches. To maximize the life of thetransmission, the planetary designdistributes loads and stresses overmultiple gears.

• Controlled throttle shifting regulatesengine speed during high-energydirectional shifts for smootheroperation and longer component life.

• The transmission and bevel gear setare modular by design, and easilyslide into the machine’s rear case,even with the ripper installed.

• Forced oil flow lubricates and coolsclutch packs to provide maximumclutch life.

• Load compensating shiftingprovides smooth engagement of theclutches under loaded conditions.

Brakes. Oil cooled, hydraulicallyactuated, brakes provide higher torquecapacity and increased service life.

Elevated Final Drive.

• Isolates final drives from ground andwork tool induced impact loads forextended power train life.

• Keeps sprocket teeth, bushings andfinal drives away from abrasivematerials and moisture.

• Caterpillar uses single reductionplanetary final drives in the D6Nproviding long-lasting performanceand durability.

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Rugged, durable and reliable components deliver smooth, responsive power andlasting reliability.

Drive Train

1) Steering Control. Differential SteeringTiller Bar control system providessimultaneous one-handed steeringand transmission control.

2) Differential Steering Motor.Bi-directional hydraulic steering motoractivates the dual differential, whichchanges the speed of individual tracks.Slowing one track and increasing thespeed of the other track achieves asmooth power turn.

3) Power Shift Transmission.Proven planetary design providesfast smooth speed changes whiledistributing loads over multiplegears for long life.

4) Final Drive. Caterpillar elevatedfinal drives provide isolation fromground or work tool impact loads,extending service life.

5) Brake Assembly. Oil cooled largediameter brake discs provide longservice life.

6) Engine. Caterpillar ® C6.6 DieselEngine with ACERT Technology meetscurrent engine exhaust emissionregulations.

7) Torque Converter. Efficient torqueconverter provides torque multiplicationfor increased drawbar pull and protectsthe drive train from shock loads.

8) Radiator. Aluminum bar plate radiatorprovides excellent heat transfer.

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State-of-the-art operator station has reduced sound levels, low cab vibrations and excellentvisibility. The Caterpillar comfort series air suspension seat helps reduce operator fatigue.Cab and air conditioning are standard.

Operator Station

Cab. The design is spacious andcomfortable to promote shift-longproductivity. Large glass window anddoor panels allow for excellent visibilityto the blade, rear and sides of themachine. Door and window seal designallows for a fully pressurized low dust

cab. Acoustic headliner material, andsound suppression foam panels reducesound levels.

Individual windshield wiper controlsare located in the front section ofthe headliner. The cooling system is

incorporated into the cab structureproviding good visibility to the rear ofthe machine. The operator can easilyaccess to the vital information regardingmachine functioning by having a lookon the efficient and clear dashboard.

Cat C500 Comfort Suspension Seat.Caterpillar C500 Comfort Series AirSuspended Seat is ergonomicallydesigned to support the operator invarious site conditions. This comfortequipment is now standard on the D6N.

• Seat is fully adjustable for maximumoperator comfort, support andreduced operator fatigue.

• Seat cushion reduces pressure on thelower back and thighs while allowingunrestricted arm and leg movement.

• A standard lumbar adjustmentprovides lower back comfort.

• Heated seat cushions are availablefrom your Caterpillar Dealer.

Dash. The instrument panel, with easyto read analog gauges and warninglamps, keeps the operator aware ofany potential problems. All gaugesand readouts are easily visible in directsunlight. Warning lights and gaugeshave been relocated, providing preciseand efficient view of the alerts.HVAC controls and vents areconveniently located on the dash toprovide climate control for the operator.Auto-shift and Auto-kickdown controlsare located within easy reach.Footpads keep the operator stable andcomfortable while working on slopes.

Electronic Monitoring System (EMS III).EMS III provides the operator instantfeedback on machine conditions andrecords performance data to helpdiagnose problems. It has flashablememory allowing system upgrades,as new technology and software becomeavailable. This system is compatiblewith Cat ET and CMS service tools.EMS with new functionalities includesthe following gauges and readouts:

• Fuel level gauge• Hydraulic oil temperature gauge• Engine coolant temperature gauge• Power train oil temperature gauge

• Indicators for:- Oil Pressure- Water in Fuel Separator

maintenance- Air Filter Plugging

• Engine oil pressure indicator• Engine speed digital readout • Transmission speed range indicator• Hour meter• Odometer

Throttle Rocker Switch. A rocker switchcontrol activates high or low idle with atouch of the finger. A decelerator pedalgives the operator full control of enginespeed when the rocker switch is in thehigh idle position. Specific enginespeeds can also be set with the rockerswitch to match application requirements.

To set engine speeds, push the decelpedal, select the desired speed andrecall it by activating the rocker switchfor 3 seconds.

Work Tool Controls. Low effort pilotoperated hydraulic controls make theD6N easy to operate and provide sure,precise blade control with less operatorfatigue. Ergonomically shaped bladeand ripper controls provide increasedoperator comfort during long shifts.

Other Features

The D6N operator station interiorstorage and amenities include:

• Adjustable armrest • Cigarette ashtray • Coat hook • Cup holder • Dome light • Electronic throttle control integrated

in the right console • Ergonomic pedals • Inside door release • Large storage space on each side

of seat • Lunchbox tie-downs• Padded consoles for side slope

operations• Storage area behind seat for

first-aid kit • Two 12-volt plug-in receptacles• Wide cab doors

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AccuGrade Attachment Ready Option.The AccuGrade Attachment ReadyOption (AccuGrade ARO) provides afactory installed on-board platform forthe AccuGrade Laser or GPS system.

All of the changes required to theelectrical system, hydraulic system,blade, and cab are incorporated into theAccuGrade ARO. Mounting bracketsadded on the blade allow easy installationof the masts. Mounting brackets in thecab secure the in-cab display. Plug-inpoints inside the cab and on the frontof the machine make it easy to installelectronic components.

Advantages. Current earthmoving andfine grading processes are labor intensive,dependent on manpower and instruments.Maintaining consistent grade betweenstakes is challenging, even forexperienced operators. The AccuGradeLaser and GPS Machine Control andGuidance Systems reduce laborrequirements and help operators workto the design plan by accurately cutting,filling and reducing material cost.

Automatic Blade Control Feature.Automatic control of the blade’s liftand/or tilt, provides consistent accuracywith higher productivity by reducingblade control demands on the operator.Based on correction signals, a hydrauliccontrol valve automatically raises orlowers the blade to maintain the correctedge elevation.

Applications. The AccuGrade Laserand the GPS systems are designed for awide range of construction earthmovingapplications requiring tight tolerancesand high productivity rates. Choosingwhether to use a Laser or GPS systemdepends on the job site requirements.

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Advanced Laser and GPS technology improves operator accuracy, increases productionand lowers operating costs.

AccuGrade® Laser and GPS Machine Control and Guidance Systems

AccuGrade Laser Grade Control System.The laser system is ideal for fine gradingsites with flat, single slope or dual slopesurfaces such as industrial, commercialand residential building sites.

Laser In-Cab Display. The in-cab displaywith easy-to-read grade indicator andbacklit elevation display shows theoperator all AccuGrade systeminformation. The in-cab display arrowsshow the blade’s position relative tograde and indicate cut or fill requirementsof the work area. Push button operationallows the operator to easily switchfrom manual mode for rough gradingto automatic mode for fine grading.

AccuGrade GPS Control System.The AccuGrade Global PositioningSystem (GPS) is the best solution whenthe construction site involves contours,rather than single or dual slope planes.A GPS system compares the bladeposition to a three-dimensionalcomputerized job site plan and signalsthe operator or hydraulic system toraise or lower the blade to achieve thedesign requirements.

GPS In-Cab Display. The in-cab displayprovides real-time operating informationto the operator. Designed for simpleoperation, the 140 mm (5.5 in) colorLCD daylight readable display withkeypad allows operators to easilyinterface with the system. Settings andviews can be easily configured accordingto operator preference. The display isdesigned for reliable performance inextreme operating conditions includingshock, dust and moisture.

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Frame and Castings. The D6N case andframes are built to absorb high impactshock loads and torsional forces.Castings are strategically located withinthe frame to add additional strength.Caterpillar uses robotic weldingtechniques in the assembly of the caseand frames. This ensures quality andreliability throughout the structure.

• High strength steel mainframeresists impact shock loads.

• Computer-aided finite elementanalysis is used to evaluate andensure durability.

• Full scale structural testing to testintegrity of the structures.

• Robotic welding provides deeppenetration and consistency forlong life.

• Precision top level machiningfor perfect alignment of boresand surfaces.

• Pivot shaft and pinned equalizer barto maintain track roller framealignment.

Equalizer Bar. The pinned equalizer bargives the roller frames the ability tooscillate up or down to better matchground contours while providingmaximum traction and operator comfort.

Roll Over Protection. N-Series cabsupports have been stiffened. Stiffer cabsupports result in lower noise andvibration in the cab, providing theoperator increased comfort.

Quality and Reliability.

• 4 mm (0.16 in) sheet metal onthe side service access panels andrear guard.

• Stamped, rounded sheet metalcorners add strength.

• Rubber isolation mounted fuel tankeliminates tank vibration and reducespotential stress fractures.

• Heavy-duty reinforced radiatorguard is now standard.

• Heavy-duty rear guard for ripper.

• Clipped seals provide protectionfrom dust and moisture for rearenclosure, door openings, andbetween ROPS post and rearenclosure.

Styling. Rounded machine shapes offerexcellent visibility, accessibility andserviceability.

• Durable, heavy steel doorpanel covers.

• Pre-cleaner is below the hoodfor good visibility.

• Engine enclosure is tapered asit reaches the cab.

• Large glass area.

• Controls are ergonomic for easieroperation and better efficiency.

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StructureEngineered and built to give solid support in the most demanding applications.Designed to last throughout the extended service life of the D6N.

SystemOne™ Undercarriage.Exclusively for Caterpillar machines thedesign extends system life and reducesoperating costs.

• Long-life Sprocket. Extended lifesprockets will outlast two or moretracks. The rotating bushingtechnology extends life.

• Guiding System. The guidingsystem contacts link rails instead ofpin ends and helps keep the trackwithin the roller system. The resultis improved track guiding.

• Rollers. The increased flangediameter on the rollers provideoptimum guiding and longer life.

• Carrier Rollers. Redesigned carrierrollers are factory sealed and servicedas a unit. The larger diameter providesextended wear to better matchundercarriage system life.

• Idlers. The center tread idlers contactonly the bushing – not the links –eliminating scalloping and providingmore guiding to the link assembly.The idlers last longer because itcontacts a rotating bushing insteadof a link rail.

• Cartridge Joints. Factory-sealedcartridge joints are laser welded tocontrol end play. They offer improvedseal integrity through an innovativenew sealing system and do notdepend on the link interface toremain sealed. As with all Catundercarriage products, they arefilled with special oils.

• May be used in any application

• The track roller frames are weldedand have a box section design,which provides strength andresistance to bending withoutadding extra weight

• The track adjuster and mechanicalrecoil spring and grease filledadjustment cylinder which allowsthe idler to move forward and backto maintain proper track tensionas it absorbs undercarriage shock

Undercarriage Arrangements.

XL (Extra Long) arrangement

• Forward idler position providesmore track on the ground and tothe front of the tractor. It providesoptimal balance, superior tractionand blade control for finish grading.

• Long roller frame provides goodflotation in soft underfootconditions.

LGP (Low Ground Pressure)arrangement

• Specially designed to work in softand spongy conditions.

• Wide track shoes, a longer trackframe and a wider gauge increasetrack contact area and reduce groundpressure for excellent flotation.

• Wide track shoes, long track framesand a wider gauge increase trackcontact area and reduce groundpressure for excellent flotation.

Complete Guarding. Caterpillarundercarriages are designed with fulllength guarding on top of the trackroller frame. This prevents abrasivematerials from falling down onmoving parts.

Roller Frames. Roller frames aretubular, to resist bending and twisting.

• Roller frames attach to the tractor bya pivot shaft and pinned equalizer bar.

Recoil System. The recoil system issuperior because it is protected fromthe elements and maintained in asealed, oil-filled cavity for years ofreliable service.

Oscillating Undercarriage. The pinnedequalizer bar is saddle-mounted beneaththe mainframe, allowing the roller framesand track to oscillate. The oscillationprovides a steady working platform andsmooth ride for the operator.

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SystemOne™ UndercarriageExclusively for Caterpillar machines the SystemOne™ Undercarriage is a revolutionary newundercarriage system – from the ground up.

Caterpillar Blades. With superiormoldboard and 4-cell structure design,Cat bulldozer blades hold up to thetoughest job conditions. Our high-tensilestrength blades resist torsional bendingand deflection in tough applications.

• High-tensile strength, Cat DH-2™steel, cutting edges resist bending.

• DH-3™ steel end bits maximizeservice life. Variable Pitch Power Angle and Tilt

Blade (VPAT). The VPAT blade givesthe operator the ability to hydraulicallyadjust the blade lift, angle and tilt fromthe operator’s station.

• Manually adjustable blade pitchfor optimum performance.

• Top corners of the blade are clippedfor better operator viewing area.(XL arrangement only).

• C-Frame is solidly pinned to themainframe for good blade controland eliminates blade motion due totrack oscillation or side forces.

• C-Frame to tractor joint is sealedand lubricated with remote linesfor extended service life and quietoperation.

• Large C-Frame tower bearings havebeen added to improve durability.

• Lubrication points are located atall pin joints to reduce wear.

VPAT Position – Blade Pitch.

• 54° – maximum blade loads andbest finish grading.

• 57.5° – good blade loads andgeneral dozing.

• 60-62° – maximum bladepenetration and reduced materialretention on blade.

Semi-Universal Blade (XL ArrangementOnly). Built for tough applicationswhere penetration and blade side loadingare important. The design of the SUblade makes it excellent for aggressivedirt penetration and loading materials.The blade wings are designed forsuperior load retention.

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Cat Work Tools and Ground Engaging Tools (G.E.T.) are designed to provide strengthand flexibility to match the machine to the job, maximizing performance.

Work Tools

Foldable Blade. Designed to conformto the 3 m (9.8 ft) width transportationlimit without blade removal. Allows asection on the left end of the blade tofold forward into transportation position.

Multi-Shank Ripper. The multi-shankparallelogram ripper lets you chooseone, two or three shanks dependingon job conditions.

• Curved or straight ripper shanks areavailable.

• Excellent chassis durability in severedrawbar applications.

Drawbar. The D6N can be equippedwith a drawbar for pulling work toolssuch as:

• Disks

• Compactors

• Chopper wheels

• Retrieval of other equipment

Winch.

• Single joystick electronicallycontrols both clutch and brakefunctions to improve operatorefficiency.

• Input clutches on PTO shaft reduceengine horsepower loss for fuelefficiency.

• Clutch engagement and brake releaseare automatically synchronized forsmooth operation.

• Winch components can be servicedwith winch mounted on tractor.

Check with your Caterpillar Dealerfor details.

Forestry Sweeps. In forestry and landclearing applications where limbs anddebris can damage a machine, optionalsweeps are available for the D6N.Sweeps help to shield critical componentson the tractor such as hydraulic lines,exhaust stacks, cab windows and lightsfrom damage.

Custom Products. The Special ProductGroup can help you with answers toyour specific requirements by buildingthe machine you need: Waste, Forestryand Shiphold applications.

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Built-in Serviceability. Less servicetime means more working time.Major components are designed asmodules and most can be removedwithout disturbing or removingother components.

Diagnostic Connector. Diagnosticconnector allows Caterpillar dealers toquickly troubleshoot the D6N or accessstored data with the use of ElectronicTechnician (Cat ET).

Diagnostics. Cat D6N diagnostic andtroubleshooting capabilities are amongthe best. Competitors monitoringsystems offer limited diagnosticcapabilities. The machine dashboardallows for quick identification ofproblems and its cause, utilizing athree level warning system.

Grouped Service Points andAccessibility. D6N machines have beendesigned with ease and simplicity ofservice in mind.

• Grouped pressure taps allow youto measure and troubleshoot thehydraulic system. Two groups ofremote taps are available, one inthe right hand fender and the secondbehind the transmission guard onthe rear of the machine.

• Hinged engine doors with mechanicalstops provide easy access to secondaryfuel filters, oil filters, engine oilfiller tube, engine air filter, and theA/C compressor.

• Left side enclosure access doorsprovide easy access to the batteries,transmission fill tube, fuse box,washer bottle, disconnect switch,transmission oil level, and machinesecurity system (optional).

• Right side enclosure access doorprovides easy access to the hydraulicoil filter and remote pressure taps.

Product Link. This system streamlinesdiagnostic efforts, downtime andmaintenance scheduling and costs byproviding communication flow of vitalmachine data and location informationbetween the dealer and the customer.Product Link provides updates on servicemeter hours, machine condition andmachine location.

Cat Machine Security System (MSS).MSS uses electronically coded keysselected by the customer to limit usageby individuals or time parameters.MSS deters theft, vandalism andunauthorized usage. Each machine systemcan store up to 255 keys and each keycan be used on as many machines asdesired. MSS can be controlled by aPersonal Data Assistant. Field installationis available.

Electronic Monitoring System. The D6Nfeatures a flexible monitoring systemthat is easily upgraded by flashingsoftware rather than replacing the module,reducing parts cost. As technologychanges and new electronics and softwarebecome available, the monitoringsystem will allow the machine to beeasily updated.

Ecology Drains. Ecology drains providean environmentally safer method todrain fluids. They are included on theradiator (coolant) and the hydraulictank, and for the engine oil change.

Easy Engine Maintenance. Many partscan be rebuilt and are available asremanufactured components.

• Parent-metal block can be reboredtwice and dry-sleeved.

• Connecting rods can be removedthrough cylinder tops.

• Camshaft followers and push rodscan be replaced without removingcamshaft.

• Extended oil and engine filterchange intervals up to 500 hours.

Accessibility.

• Hinged engine doors to increaseengine and service access.

• Filters located within easy reachduring PM service.

• Air filter conditions are monitoredelectronically.

• Fast fuel tank provision available(attachment).

• Larger service panel doors.

• Diagnostic test ports added for quicktroubleshooting.

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ServiceabilityModular design moves Caterpillar a generation ahead in simplifying serviceand maintenance.

Product Support. Nearly all D6N partscan be found at Cat dealer parts counters.Cat dealers utilize a worldwide computernetwork to find in-stock parts to minimizemachine downtime. An exchangeprogram for major components may beavailable. This will shorten repair timeand lower costs.

Remanufactured Components.Save money with remanufactured parts.You receive the same warranty andreliability as new products at a costsavings of 40 to 70 percent.

Service Capability. Whether in thedealer’s fully equipped shop or inthe field, you will get trained servicetechnicians using the latest technologyand tools.

Selection. Make detailed comparisonsof the machines you are consideringbefore you buy. How long do componentslast? What is the cost of preventivemaintenance? What is the true cost oflost production? Your Cat Dealer cangive you answers to these questions.

Purchase. Consider the financingoptions available as well as day-to-dayoperating costs. This is also the timeto look at dealer services that can beincluded in the cost of the machineto yield lower equipment owning andoperating costs over the long run.

Operation. Improving operatingtechniques can boost your profits.Your Cat Dealer has training videotapes,literature and other ideas to help youincrease productivity.

Replacement. Repair, rebuild or replace?Your Cat Dealer can help evaluate thecost involved so you can make theright choice.

Maintenance. More and more equipmentbuyers are planning for effectivemaintenance before buying equipment.Choose from your dealer’s wide rangeof maintenance services at the time ofyour purchase. Repair option programsguarantee the cost of repairs up front.Diagnostic programs such as ScheduledOil Sampling and Technical Analysishelp avoid unscheduled repairs.

SAFETY.CAT.COM™.

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Total Customer SupportYour Cat Dealer offers a wide range of services that can be set up with a Customer SupportAgreement. The dealer can customize a plan for you, from PM service to total machinemaintenance, allowing you to optimize your return on investment.

18 D6N Track-Type Tractor specifications

Weights

Operating Weight – 16 404 kg 36,166 lbXL with SU BladeOperating Weight – 16 605 kg 36,610 lbXL with VPAT BladeOperating Weight – 17 791 kg 39,222 lbLGP with VPAT BladeShipping Weight – 16 099 kg 35,492 lbXL with SU BladeShipping Weight – 16 300 kg 35,935 lbXL with VPAT BladeShipping Weight – 17 486 kg 38,550 lbLGP with VPAT Blade

• Operating Weight: Includes EROPS, A/C lights, transmission,drawbar, engine enclosure, 3-valve hydraulics, 100% fuel,C500 Comfort Seat and operator.

• Shipping Weight: Includes EROPS, A/C lights, transmission,drawbar, engine enclosure, 3-valve hydraulics, 5% fuel andC500 Comfort Seat.

Dimensions

Overall Length Basic Tractor 3.74 m 12 ft 4 in(with Drawbar)

Undercarriage

Width of Shoe – XL 610 mm 24.01 inWidth of Shoe – LGP 840 mm 33.07 inShoes/Side – XL 40Shoes/Side – LGP 46Track Gauge – XL 1890 mm 74.4 inTrack Gauge – LGP 2160 mm 85.03 inTrack on Ground – XL 2581 mm 101.6 inTrack on Ground – LGP 3117 mm 122.7 inGround Contact Area – XL 3.15 m2 4,882 in2

Ground Contact Area – LGP 5.24 m2 8,122 in2

Ground Pressure – XL 51.6 kPa 7.48 psiGround Pressure – LPG 33.2 kPa 4.8 psiTrack Rollers/Side – XL 7Track Rollers/Side – LGP 8

Blades

Blade Type VPAT, SUXL SU – Blade Capacity 4.28 m3 5.6 yd3

XL SU – Blade Width 3154 mm 10.35 ftXL VPAT – Blade Capacity 3.18 m3 4.16 yd3

XL VPAT – Blade Width 3272 mm 10 ft 9 inLGP VPAT – Blade Capacity 3.16 m3 4.13 yd3

LGP VPAT – Blade Width 4080 mm 13 ft 5 in

Engine

Engine Model Cat® C6.6 ACERT™Flywheel Power 111.8 kW 150 hpNet Power – Caterpillar 111.8 kW 150 hpNet Power – ISO 9249 111.8 kW 150 hpNet Power – SAE J1349 110.4 kW 148 hpNet Power – EU 80/1269 111.8 kW 150 hpBore 105 mm 4.13 inStroke 127 mm 4.99 inDisplacement 6.6 L 402.75 in3

• Engine Ratings at 2,200 rpm.

• Net power advertised is the power available at the flywheelwhen the engine is equipped with fan, air cleaner, mufflerand alternator.

• No derating required up to 3000 m (9,840 ft) altitude, beyond3000 m (9,840 ft) automatic derating occurs.

Transmission

1.5 Forward 3.1 km/h 1.93 mph2.0 Forward 4.6 km/h 2.86 mph2.5 Forward 5.7 km/h 3.54 mph3.0 Forward 7.5 km/h 4.66 mph3.5 Forward 10 km/h 6.21 mph1.5 Reverse 3.1 km/h 1.93 mph2.0 Reverse 5.1 km/h 3.17 mph2.5 Reverse 6.4 km/h 4 mph3.0 Reverse 8.6 km/h 5.34 mph3.5 Reverse 11.6 km/h 7.21 mph1.5 Forward – Drawbar Pull 320 kN 71,939 lb2.0 Forward – Drawbar Pull 175 kN 39,341.6 lb3.0 Forward – Drawbar Pull 97 kN 21,806.5 lb

Service Refill Capacities

Fuel Tank 299 L 79 galCooling System 35 L 9.24 galFinal Drives (each) 7 L 1.84 galHydraulic Tank 29.5 L 7.79 gal

19D6N Track-Type Tractor specifications

Standards

• ROPS (Rollover Protective Structure) offered by Caterpillarfor the machine meets ROPS criteria SAE J1040 MAY94,ISO 3471:1994 and DLV criteria SAE J397B, ISO 3164:1995.

• FOPS (Falling Object Protective Structure) meetsSAE J/ISO 3449 APR98 Level II, ISO 3449:1992 Level IIand DLV criteria SAE J397B, ISO 3164:1995.

• Brakes meet the standard SAE J/ISO 10265 MARCH99,ISO 10265:1998.

• The operator sound exposure Leq (equivalent sound pressurelevel) measured according to the work cycle proceduresspecified in ANSI/SAE J1166 OCT 98 is 81.5 dB(A), for caboffered by Caterpillar, when properly installed and maintainedand tested with the doors and windows closed.

• The operator sound pressure level measured according tothe procedures specified in ISO 6394:1998 is 75 dB(A) forthe cab offered by Caterpillar, when properly installed andmaintained and tested with the doors and windows closed.

• Hearing protection is recommended when operating withan open operator station and cab (when not properlymaintained or doors/windows open) for extended periodsor in noisy environment.

• The exterior sound pressure level for the standard machinemeasured at a distance of 15 meters according to the testprocedures specified in SAE J88 APR 95, mid-gear-movingoperation, is 80 dB(A).

• The labeled sound power level is 110 dB(A) measuredaccording to the test procedure and conditions specifiedin 2000/14/EC.

Ripper

Type Fixed ParallelogramNumber of Pockets 3Overall Beam Width 2202 mm 86.7 inBeam Cross Section 216 � 8.5 �

254 mm 10.0 inMaximum Penetration – XL 473.5 mm 18.6 inMaximum Penetration – LGP 359.5 mm 14.2 inEach Additional Shank 78 kg 172 lb

Winch

Winch Model PA55Weight* 1276.5 kg 2,814 lbOil Capacity 74 L 19.55 galWinch and Bracket Length 1145 mm 45.1 inWinch Case Width 975 mm 38.4 inDrum Diameter 254 mm 10 inDrum Width 315 mm 12.4 inFlange Diameter 504 mm 19.8 inRecommended Cable Size 19 mm 0.75 inOptional Cable Size 22 mm 0.87 inDrum capacity – 122 m 400 ftRecommended cableDrum capacity – Optional cable 88 m 289 ftCable Ferrule Sizes – 54 mm 2.13 inOutside DiameterCable Ferrule Sizes – Length 65 mm 2.56 in

* Weight: Includes pump, operator controls, oil, mountingbrackets and spacers.

20 D6N Track-Type Tractor specifications

Dimensions (approximate)

Tractor DimensionsXL LGP

1 Track gauge 1890 mm 74.4 in 2160 mm 85 in2 Width of tractor

With the following attachments:Standard shoes without blade 2500 mm 98.4 in 3000 mm 118 inNarrow shoes without blade 2450 mm 96.5 in 2870 mm 113 inStandard shoes with VPAT blade fully angled 2972 mm 117 in 3706 mm 146 in

3 Machine height from tip of grouser:With the following equipment:

ROPS canopy 3040 mm 119.7 in 3144 mm 123.8 inROPS cab 3095 mm 121.9 in 3200 mm 126 in

4 Drawbar height (center of clevis)From ground face of shoes 565 mm 22.2 in 669 mm 26.3 in

5 Length of track on ground 2581 mm 101.6 in 3117 mm 122.7 in6 Length of basic tractor (with drawbar) 3740 mm 147.2 in 4165 mm 164 in

With the following attachments,add to basic tractor length:

Ripper 1026 mm 40.4 in 1026 mm 40.4 inPA55 winch 381 mm 15 in 381 mm 15 inVPAT blades, straight 1163 mm 45.8 in 1204 mm 47.4 inVPAT blade, angled 25° 1787 mm 70.4 in 2125 mm 83.7 inSU blade 1417 mm 55.8 in —

7 Height over stack from tip of grouser 2979 mm 117.3 in 3083 mm 121.4 in8 Height of grouser 66 mm 2.6 in 57 mm 2.2 in9 Ground clearance from ground face of shoe (per SAE J1234) 394 mm 15.5 in 507 mm 20.0 in

12

3

9

7

4

56

8

21D6N Track-Type Tractor specifications

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

POWER TRAINCat® C6.6 with ACERT™ Technology, Caterpillar Common

Rail fuel system, ADEM™ A4 Electronic ControlModule and air-to-air aftercooling

Single poly-vee belt with automatic belt tensionerEther starting aidDirect drive fanAluminum bar plate cooling system (radiator, power train,

aftercooler)Steel tube-fin oil cooler (differential steering)Air cleaner with integrated Precleaner and automatic dust

ejector and under hood air intakeElectrical fuel priming pump with integrated fuel/water

separatorDecelerating function (toggle switch & pedal engine

speed control)Planetary powershift transmission with torque converterControlled throttle shifting with automated load compensationAutomatic down-shift and kick-down transmission controlAuto-shift (1.5F-2.5R, 2.5F-2.5R, 2.5F-1.5R)System MVP: Multiple speed functionality providing

5 discrete ground speed selectionsSteering system: Differential steering with pilot control

tiller barOTHER STANDARD EQUIPMENT

Crankcase guardEcology drains (engine, power train, hydraulic oil)S•O•SSM taps for engine, power train, transmission oilCoolant sampling portCentralized remote mounted pressure tabs for easy access

and diagnosticFront pull deviceHinged radiator louvered grillHinged engine doorsLockable engine enclosuresRigid drawbarThree valve hydraulics for VPAT dozerLoad sensing hydraulicsImplement oil filter

ELECTRICALHornHour meterBack-up alarm12-volt converter, 10-ampDiagnostic connector950 CCA class 31 batteriesIntegrated front lights95 amp HD brushless alternator (24 volt)Starter (24 volt)

OPERATOR ENVIRONMENTROPS/FOPS cab with integrated A/CSeat, air suspension, cloth for cabAdjustable armrestSeat belt, retractable 76 mm (3 in)Foot rests for slope workFour gauge cluster (engine coolant, transmission oil temp,

hydraulic oil temp, fuel level)Electronic Monitoring System (EMS III)Electronically programmable gear limiterPower points, two 12-voltRadio ready, 12-volt, plug and playStorage compartmentCup holder (LH)Coat hookElectronic engine air cleaner service indicatorElectronic water-in-fuel sensor service indicatorMirror, rearviewTransmission shift points selection function on dash

UNDERCARRIAGESystemOne™ UndercarriageCenter tread idlerLifetime lubricated track rollers (7 XL & 8 LGP) and idlersCarrier rollersReplaceable sound suppressed/undercut sprocket rim

segmentsTracks 40 section – 610 mm Extreme Service (24") for XLTracks 46 section – 840 mm (33") Medium Service for LGP

(for 3m transport compliance)Hydraulic track adjustersEnd track guiding guardsCenter track guiding guard for improved side slope work

(LGP only)

22 D6N Track-Type Tractor specifications

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

Starting aids:Engine coolant heaterHeavy-duty batteries

Track pair; SystemOne:XL arrangement, 40-sections:

560 mm (22 in) ES610 mm (24 in) MS610 mm (24 in) ES Center Hole

LGP arrangement, 46-sections:840 mm (33 in) ES840 mm (33 in) ES Center Hole865 mm (34 in) Self Cleaning

Winch and fairleads:Tractor, winch preparationTractor, winch readyCover, console, winchWinch (standard or low speed)Fairlead, 3 rollersFairlead, 4 rollers

Oil change, high speedRadiator, trash resistantTurbine air precleanerForestry ArrangementWaste Handling ArrangementFine Grading ArrangementCaterpillar Product Link

AccuGrade ARO (Laser/GPS)Bulldozers – See Bulldozer Specifications Chart for WeightsCanopyHeater, dash mounted for OROPSFan, reversibleFast fill fuel tankLighting system, 4 lightsRotating beaconMachine Security System (MSS)Guards:

Crankcase, heavy dutyFuel tankFront linesLift cylindersFinal drivesGuard, rear, heavy dutyGuiding Track MSGuiding Guarding Track HDGuard, track guiding, center XLRadiator, heavy duty, hinged grillStriker barsSand blast gridRear screen for EROPS cabRear screen for OROPS canopySweeps, EROPSSweeps OROPS

Hydraulics and Ripper:Four valve for either SU blade (XL) and ripper or VPAT

blade and ripperTwo valves for SU bladeRipper, parallelogram (with three straight teeth)Each optional curved tooth, replacing straight toothCover, console, ripper

D6N Track-Type Tractor specifications 23

Notes

R

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

© 2007 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 Caterpillar dealer for available options.

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as well as corporate and product identity used herein, are trademarksof Caterpillar and may not be used without permission.AEHQ5742-01 (10-07)

D6N Track-Type Tractor