The C-9 engine, matched with the torque divider and field proven power shift transmission, provides years of dependable service.
The Caterpillar C-9 engine meets worldwide emissions regulations for the Environmental Protection Agency (EPA), the European Union (EU) and the Japan Ministry of Construction (JMOC).
- Wastegated turbocharger for improved response.
- Extended oil change intervals.
Cylinder LinersMid-supported wet cylinder liners provide excellent durability and rebuildability.
Advanced Fuel SystemThe C-9 features an electronically controlled, hydraulically-actuated, direct injection fuel system that provides improved fuel economy and reduced emissions.
Cylinder BlockEngine durability begins with its foundation - the engine block. The serpentine design of the C-9 block provides maximum strength in a reduced weight design. It is a single-piece, deep-skirted design providing a solid base for the durability you require in today’s D6R II.
Cylinder HeadThe C-9 cylinder head is designed for maximum breathing, which helps ensure excellent fuel efficiency. This one-piece, stress-relieved, gray-iron casting has four valves per cylinder. Robust intake and exhaust valves aid airflow and provide excellent reliability and fuel efficiency.
PistonsThe two-piece articulated piston design consists of a forged-steel crown for maximum strength and a cast aluminum skirt to reduce weight. A large piston pin holds the crown, skirt and connecting rod together. The aluminum skirt runs cooler than conventional pistons, allowing a closer fit to the cylinder liner and providing longer life. The steel crown handles the higher internal pressures of today’s engines.
CrankshaftThe crankshaft is a steel forging with induction-hardened journals and fillets. The wide center and end main journals and bearings are designed to maintain maximum oil film thickness for excellent lubrication and for cooling the bearings. The result is long life-to-overhaul.
Turbocharged and AftercooledWhen you couple a turbocharger with cooler inlet air from a superior aftercooling system it is no surprise that the C-9 engine will have cleaner emissions with better response, longer life, improved fuel economy, and less heat rejection.
TurbochargerThe C-9 uses a wastegated turbocharger providing better bottom-end response, improved fuel economy, and less heat rejection.
Components Live LongerCylinder heads utilize additional coolant passages to provide maximum engine cooling. Cylinder liner inner surfaces are fully honed and induction hardened to maximize wear resistance. Oil-cooled pistons and full-length, water-cooled cylinder liners provide maximum heat transfer for longer component life.
Advanced Modular Cooling System (AMOCS)
AMOCS utilizes an exclusive two pass cooling system and increased cooling surface area to provide significantly more cooling efficiency than conventional systems.
Two Pass Cooling SystemUsing a two pass system, the AMOCS radiator provides a more efficient heat exchange. The coolant is routed from a sectioned bottom tank up the front side, over the top of the core and down the engine side of the core to the bottom tank. This flow pattern allows the coolant to pass through the radiator twice for better cooling.
The cooling elements are individual core modules connected to a sectioned bottom tank. There is no top tank to remove.
- Standard nine steel fins per 2.54 cm (1 in), or an optional 6 steel fins per 2.54 cm (1 in).
- Brass tube construction within each core for improved reliability.
Air-to-Air AftercoolerThe D6R II features air-to-air aftercooling. Dedicated air-to-air aftercooler circuit provides cooler inlet air temperatures, which improves performance and reduces engine emissions.
ServiceabilityModular core design permits removal of a single core without removing the entire radiator, which reduces repair costs and downtime. AMOCS eliminates the top tank, side channels and one sealing surface, making it more reliable and easier to service. It features a site gauge for quick service checks.
Protection From LeaksTo reduce the potential for coolant leaks, brass tubes are welded to a large, thick header, improving strength of the tube-to-header joint. In conditions where abrasive materials can be airborne, use the attachment sand blast grid to prevent core damage.
Sand Blast GridIn an application where airborne debris is prevalent, radiator core protection is a concern. To extend radiator life in harsh applications, a sand blast grid is available as an option to deflect the damaging debris the engine fan propels at the radiator.
Get maximum power to the ground with the efficiency and reliability you expect from Caterpillar machines.
Torque DividerA single stage torque converter sends 70% of engine torque through a converter and 30% through a direct drive shaft for greater driveline efficiency and higher torque multiplication to get heavy loads moving. The torque divider provides improved efficiency and broader range of performance in second gear applications.
Key Benefits of a Torque Divider
The D6R II torque divider provides:
- High reliability.
- Low dynamic torque.
- Optimum combination of operator efficiency and driveline reliability.
- Components are designed to absorb full engine power.
The D6R II planetary power shift transmission features three speeds forward and three speeds reverse and utilizes large diameter, high-capacity, oil-cooled clutches. To maximize the life of the transmission, the planetary design distributes loads and stresses over multiple gears.
- Controlled throttle shifting regulates engine speed during high energy directional shifts for smoother, more comfortable operation and longer component life.
- Electronic clutch pressure control permits fast speed and direction changes.
- Modular transmission and bevel gear slide into rear case for servicing ease, even with ripper installed.
- Oil-to-water cooler for maximum cooling capacity.
- Forced oil flow lubricates and cools clutch packs to provide maximum clutch life.
Operating Efficiency and Driveline ReliabilityThe D6R II torque divider attains the best combination of operating efficiency and driveline reliability. It reduces dozing shock loads to the transmission and final drives by acting as a hydrodynamic component between the engine and transmission.
Finger Tip ControlThe D6R II with Finger Tip Control features low effort finger tip levers for steering and touch shift buttons for upshift and downshift. The steering clutches and brakes are fade resistant and adjustment free. Multi-disk, oil-cooled steering clutches are hydraulically applied and electronically controlled. Brakes are applied by springs and hydraulically released for safe, reliable braking performance.
Differential SteeringA D6R II equipped with differential steering maintains power to both tracks while turning. The tractor turns when one track speeds up and the other slows down an equal amount. The operator can steer and control the transmission simultaneously which can reduce cycle times in some applications. The differential steering tiller bar has touch shift buttons for upshifts and downshifts. The tiller bar itself is easily rotated forward or reverse to change the respective tractor direction. The tiller bar is moved forward to steer the tractor to the left and pulled back to go right. Low tiller bar efforts assure operator comfort during long shifts. Large blade loads can be maneuvered around buildings, bridge abutments, trees, or other obstacles. Steering modulation is also optimized for precise control in these applications. Greater load capacity, power and speed control are possible in soft underfoot conditions and on steep slopes because both tracks are powered during turns.
Elevated Final DriveIsolates final drives from ground and work tool induced impact loads for extended power train life.
Thick, Large Diameter Plates and Clutch DisksProvides higher torque capacity and increased service life.
Auto-Shift/Auto-KickdownAuto-shift allows the operator to pre-select a forward and reverse gear for easy, efficient directional changes. Auto-shift settings include first forward to second reverse, second forward to second reverse and second forward to first reverse. Auto-kickdown allows the transmission to automatically downshift when significant load increases are detected.
Load Compensating ShiftingAutomatically adjusts the clutch engagement timing according to load factor, resulting in improved tractor performance and operator comfort during speed changes. Load compensating shifting reduces the amount of energy dissipated through the clutches to help extend transmission component life.
Steering Clutches and BrakesFinger Tip Control equipped D6R II - steering clutches and brakes are fade resistant and adjustment free. Multi-disk, oil-cooled steering clutches are hydraulically applied and electronically controlled. Brakes are applied by springs and hydraulically released for safe reliable braking performance.
The D6R Series II operator station is designed for comfort and ease of operation.
CabIsolation-mounted, pressurized cab reduces noise and vibration for operator comfort.
DashAn informed operator is a productive operator. With a newly designed instrument panel, the operator will be kept informed of machine system information. Easy to read analog gauges and a warning lamp keeps the operator aware of any action that is needed. New foot pads adjacent to the dash help the operator stay comfortable and confident during slope applications.
Electronic Steering and Transmission ControlThe D6R II offers standard Finger Tip Control (FTC) or optional differential steering. Both steering methods deliver the maneuverability and control operators need to match to operating conditions. Touch shift buttons on the steering control shifts the electronically controlled powershift transmission. Both steering systems allow simultaneous, one-hand steering and transmission control.
Work Tool ControlsThe D6R II features ergonomically designed blade and ripper controls with low effort pilot operated hydraulics for added operator comfort, easy operation and precise work tool control. When equipped with a PAT blade, the blade control allows simultaneous six way control of the blade with a thumb rocker control to adjust blade angle.
Work Tool Lock-outThe lock-out valve prevents inadvertent operation of the hydraulic work tool attachments.
Throttle Rocker SwitchA rocker switch control activates high or low idle with a touch of a finger. A decelerator pedal gives the operator full control of engine speed when the rocker switch is in the high idle position.
Caterpillar Comfort Series SeatThe D6R II features the new Cat Comfort Series Seat for increased operator comfort and reduced operator fatigue. The seat is fully adjustable and designed for comfort and support. The seat and back cushions are thicker and designed to reduce pressure on the lower back and thighs while allowing unrestricted arm and leg movement.
Cat D6R Series II work tools are designed to provide flexibility to match the machine to the job.
Caterpillar BladesWith superior moldboard and cell structure design, Cat bulldozer blades load easily and are durable. Cat high-tensile strength blades resist torsional bending and deflection in tough applications.
Load Sensing HydraulicsField-proven load-sensing pilot controlled hydraulics respond to operating requirements by automatically and continually adjusting hydraulic power to maximize work tool efficiency.
Multi-Shank RipperThe multi-shank parallelogram ripper lets you choose one, two or three shanks depending on job conditions. Curved or straight ripper shanks are available.
The D6R II can be equipped with a drawbar for pulling work tools such as:
- Chopper wheels.
- Retrieving other equipment.
- Single lever control actuates both clutch and brake functions to improve operator efficiency.
- Input clutches on PTO shaft reduce engine horsepower losses, provide fuel efficiency and economy.
- Clutch engagement and brake release are automatically synchronized for smooth operation.
- Winch components can be serviced with winch mounted on tractor.
Forestry SweepsIn applications where tree limbs can damage a machine, optional forestry sweeps are available to protect your investment. Sweeps help shield intake air cleaners, exhaust stack, cab windows and lights from damage.
Rear CounterweightRear counterweights may be needed to optimize balance for backing up steep slopes or increasing performance in heavy dozing applications. Recommended if other rear attachment is not specified.
Engineered and built to give solid support in the most demanding work.
Frame and CastingsThe D6R II frame is built to absorb high impact shock loads and twisting forces. Castings are added to provide added strength to the main case.
L-Shaped Push ArmsL-shaped push arms bring the blade closer to the machine than diagonal brace design for excellent maneuverability, machine balance and blade penetration. The L-shaped push arm design provides solid lateral stability and better cylinder positions for constant pryout independent of blade height.
Pivot ShaftThe pivot shaft is bolted to the mainframe and connects to the roller frames for independent oscillation. The strong pivot shaft distributes impact loads throughout the case, reducing bending stresses on the case. This design eliminates alignment problems and the need for diagonal braces on the roller frames. Caterpillar Track-Type Tractors set the industry standard for mainframe durability.
Equalizer BarThe pinned equalizer bar gives the roller frames the ability to oscillate up or down to better match ground contours while providing maximum traction and operator comfort. Equalizer bar with optional oil filled end pin joints and limited slip seals offer longer life in severe applications and reduced repair costs.
The Caterpillar elevated sprocket undercarriage arrangements allow optimized balance for the best possible performance in each application.
- Performs well in many applications with firm to soft underfoot conditions. XL arrangement
- More track to the front optimizes tractor balance for superior traction, blade control and stability for finish grading. Longer roller frame also improves flotation in soft underfoot conditions. XW arrangement
- Designed to be more productive in rainy, wet or muddy conditions. Wider track gauge and shoes broadens the application range and extends the working season. LGP arrangement
- Specially designed to work in swampy and spongy conditions. Wide track shoes, long track frames and a wider gauge increases track contact area and reduces ground pressure for improved stability and excellent flotation in swampy conditions.
Roller frames are tubular, to resist bending and twisting, with added reinforcement where operating loads are the highest.
- Roller frames attach to the tractor by a pivot shaft and pinned equalizer bar.
- Large pivot shaft bushings operate in an oil reservoir.
- The recoil system is sealed and lubricated.
Sealed and Lubricated Track
Improved Steel Sprocket Segments
Rotating Bushing Track
Elevated Sprocket Design
Simplified service means more productive uptime.
Product LinkThe optional Product Link System is a factory installed or easily retrofitted wireless system that simplifies equipment fleet tracking. Using satellite technology, the Internet and your dealer’s storefront website, the system automatically reports key machine parameters such as location, hour meter, active and logged service codes and forwards them to the customer through the dealer’s storefront website.
Caterpillar Monitoring System
The D6R II features a more flexible monitoring system that is easily upgraded by flashing software rather than replacing the module. As technology changes and new electronics and software become available, this upgraded monitoring system will allow the machine to be easily updated and take advantage of improvements. The Caterpillar Monitoring System is designed to:
- Allow easy upgrades.
- Reduce the parts cost.
- Reduce downtime.
- Match software to unique application needs.
Diagnostic ConnectorDiagnostic connector allows Caterpillar dealers to quickly troubleshoot the D6R II or access stored data with the use of Electronic Technician (Cat ET) or ECAP.
Pressure Test PointsPressure test points for power train and hydraulic systems are provided.
Ecology DrainsEcology drains provide an environmentally safer method to drain fluids. They are included on the radiator, hydraulic tank and major power train components.
Cooling SystemAMOCS individual cooling elements allow radiator servicing without major component removal, saving considerable time and cost.
Built-in ServiceabilityLess service time means more working time. Major components are made as modules and most can be removed without disturbing or removing others.
Scheduled Oil Sampling (S•O•S™)
Total Customer Support
Unmatched in the industry!
ServicesYour Cat Dealer offers a wide range of services that can be set up under a customer support agreement when you purchase your equipment. The dealer will help you choose a plan that can cover everything from machine and attachment selection to replacement, to help you get the best return on your investment.
Product SupportYou will find nearly all D6R II parts at our dealer parts counter. Cat Dealers utilize a worldwide computer network to find in-stock parts to minimize machine down time. Save money with remanufactured parts. You receive the same warranty and reliability as new products at cost savings of 40 to 70 percent.
Service CapabilityWhether in the dealer’s fully equipped shop or in the field, you will get trained service technicians using the latest technology and tools.
SelectionMake detailed comparisons of the machines you are considering before you buy. How long do components last? What is the cost of preventive maintenance? What is the true cost of lost production? Your Cat Dealer can give you answers to these questions.
PurchaseConsider the financing options available as well as day-to-day operating costs. This is also the time to look at dealer services that can be included in the cost of the machine to yield lower equipment owning and operating costs over the long run.
OperationImproving operating techniques can boost your profits. Your Cat Dealer has training videotapes, literature and other ideas to help you increase productivity.
ReplacementRepair, rebuild or replace? Your Cat Dealer can help evaluate the cost involved so you can make the right choice.
MaintenanceMore and more equipment buyers are planning for effective maintenance before buying equipment. Choose from your dealer’s wide range of maintenance services at the time you purchase your machine. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as Scheduled Oil Sampling and Technical Analysis help avoid unscheduled repairs.