The 3406C engine, torque divider and field proven, power shift transmission provide an excellent balance between efficiency and power.
EngineCaterpillar 3406C engine performs at full-rated net power with a torque rise of 55%.
Meets RegulationsThe 3406C engine meets worldwide emissions regulations for the Environmental Protection Agency, the European Union and the California Air Resources Board.
Turbocharging and AftercoolingTurbocharging and aftercooling provide high horsepower while keeping RPM and exhaust temperatures low.
Steel SpacerA steel spacer between the block and head eliminates the need for block counterbores, extending block life.
Longer Component LifeComponents live longer because oil-cooled pistons and full-length water-cooled cylinder liners provide maximum heat transfer for longer component life.
ValvesStellite-faced valves, through-hardened crankshaft journals and steel-backed, copper-bonded aluminum bearings help assure reliable performance in the toughest duty.
Dealer's Exchange ProgramCat dealer's exchange program for major engine components can cut repair time and costs.
Torque DividerA single-stage torque converter with output torque divider send 70% of engine torque through the converter, 30% through a direct drive shaft for greater driveline efficiency and higher torque multiplication.
Torque ConverterThe torque converter shields the driveline from sudden torque shocks and vibration.
Final DrivesElevated final drives are isolated from ground and implement induced impact loads for extended power train life.
TransmissionPlanetary power shift transmission has 3-speeds forward and 3-speeds reverse and utilizes large diameter, high-capacity, oil-cooled clutches.
Superior cooling and ease of service keep the D8R on the job and producing day after day.
Cooling CapacityAdvanced Modular Cooling System (AMOCS) utilizes an exclusive two pass cooling system and increased cooling surface area to provide significantly more cooling capacity than conventional systems.
Extended Life CoolantCaterpillar Extended Life Coolant (ELC) is now standard in all D8R tractors.
Two Pass Cooling SystemTwo pass cooling system circulates coolant from the sectioned bottom tank up through one side of the cooling element and down through the other side returning it to the bottom tank.
Cooling ElementsThe cooling elements are individual core modules that are connected to a sectioned bottom tank.
ServicingThe servicing of the AMOCS can be performed without tilting the radiator guard.
Uses hydraulics instead of friction to steer.
Uninterrupted PowerDifferential steering delivers uninterrupted power to both tracks to help maintain blade loads, reduce cycle times and provide enhanced side slope capability.
SteeringThe operator can steer and change directions easily with one hand.
TurningA planetary differential turns the machine by speeding up one track and slowing the other while maintaining full power to both.
Tiller ControlTiller control allows the operator to work more precisely in close areas, around structures, obstacles, grade stakes, other machines or on fine grades.
Efficient in Soft UnderfootingEspecially efficient in soft underfooting, where both tracks can power through turns to keep loads moving and maintain traction.
Hydraulic SystemAn efficient hydraulic system devotes one pump solely to steering with a separate pump to power implements.
Durable design and construction stand up to the most demanding applications.
MainframeMainframe strength. The D8R mainframe is built to absorb high impact shock loads and twisting forces.
Frame RailsFrame rails are full box section, designed to keep components rigidly aligned.
Steel CastingsHeavy steel castings give added strength to the main case, equalizer bar saddle, front cross member and tag-link trunnion.
DurabilityThe top and bottom rails are continuous rolled sections, with no machining or welding to provide superior mainframe durability.
Final DrivesThe main case elevates the final drives well above the ground level work area to protect them from impact loads, abrasion and contaminants.
Track Roller Frame AlignmentA pivot shaft and pinned equalizer bar maintain track roller frame alignment.
Tag-link ConstructionTag-link construction brings the blade closer to the machine for more precise dozing and load control.
Tag-link DesignTag-link design provides solid lateral stability and better cylinder positions for constant pryout independent of blade height.
Caterpillar elevated sprocket tractors provide excellent traction, durability and ride with outstanding component life.
DesignSuspended undercarriage design absorbs impact loads to reduce the shock loads transferred to the undercarriage.
SuspensionBogie suspension conforms more closely to the ground to provide more ground contact, especially in hard, uneven terrain.
Roller FramesRoller frames are tubular, to resist bending and twisting, with added reinforcement where operating loads are the highest.
Non-suspended UndercarriageNon-suspended undercarriage, without bogies, is available for applications involving moderate-impact, or highly abrasive materials.
TrackSealed and lubricated track. Permanently coats the track pin with a sealed-in lubricant, minimizing metal-to-metal contact.
Designed for comfort and ease of operation.
ViewClear full-circle view.
OperationComfortable, non-tiring operation.
ControlsLow effort controls are easily accessible and provide sure, precise maneuvering with less operator fatigue.
SeatThe Caterpillar Contour Series Seat is fully adjustable and designed for comfort and support.
Control Lever RestraintsImplement control lever restraints, when engages, prevent inadvertent movement of control lever.
Tiller ControlDual twist tiller controls the direction and degree of turns, forward-reverse shifting and gear selection with one control.
Electronic Monitoring System (EMS) and Gauge GroupThe Gauge Group includes engine coolant temperature, power train oil temperature, hydraulic oil temperature and fuel level.
The D8R can be tailored to fit a variety of applications with many attachment options.
BulldozersThe 8SU blade and the 8U blade make full use of the D8R's power.
RippersSingle and multi-shank rippers are made to penetrate tough material fast and rip thoroughly.
Custom ProductsIn addition to the standard range of optional equipment, there are special attachments and machine configurations to suite particular customer needs.
Load Sensing Hydraulics
Adjusts implement and hydraulic power to increase both operator and machine efficiency.
Monitor Hydraulic PowerLoad-sensing hydraulics utilize a feedback loop from the implement valve to the implement pump to continually monitor the hydraulic power requirements of the implement.
Pump OutputDuring normal blade or ripper corrections, pump output increases and decreases to provide precise power for dozing or ripping.
Increased Machine ProductionLower pump requirements reduce engine power requirements for the hydraulics, making more drawbar power available for increased machine production.
Ease of service and maintenance gives you more time on the job.
ServicingBuilt-in servicing ease. Less service time means more working time.
Ecology DrainsEcology drains provide an environmentally safer method to drain fluids.
FiltersSpin-on fuel and engine oil filters save changing time.
CoolingAMOCS individual cooling elements allow radiator servicing without major component removal, saving considerable time and cost.
Diagnostic ConnectorA diagnostic connector allows the Cat Dealer's electronic test instrument to quickly troubleshoot the electrical system.
Disconnect FittingsQuick disconnect fittings allow for fast diagnosis of the power train and implement oil systems.
Caterpillar's dealer commitment is unrivaled in the industry.
QualityDealers committed to fast, quality customer support.
ResponseDealer service response extends to programs such as Custom Track Service (CTS), Scheduled Oil Sampling (SOS), and guaranteed maintenance contracts that get peak life and performance from your machine.
ExpertsYour dealer is also expert at arranging affordable lease, rental or purchase financing for all Caterpillar products.