Cab and Controls
Productivity, safety, comfort
Operator EnvironmentThe D8R features an isolation-mounted, pressurized cab that reduces noise and vibration. Large, single pane windows offer good views all around the machine for maximum productivity and enhanced job site safety. The Comfort Series seat is offset by 15 degrees for better visibility. It features fully adjustable positioning and armrests to provide a comfortable platform when working on steep grades or slopes. Gauges and warning lights on the in-dash instrument cluster are easy to read, even in direct sunlight. The Cat Electronic Monitoring System (EMS) provides alert indicators that monitor key machine components. The system provides three levels of warning and system monitoring so the operator can stay informed and still concentrate on the job. Heating and air conditioning vents evenly distribute airflow within the cab. The cab is pre-wired for a 12-volt or 24-volt radio, equipped with two speakers, an antenna and a radio mount recessed in the headliner.
Dozer and Ripper ControlsAll D8R controls are ergonomically designed for low-effort and ease of operation. The dozer and ripper control levers feature load-sensing hydraulics for added operator comfort and precise control. Load-sensing hydraulics adjusts implement and hydraulic power to increase both operator and machine efficiency. The hydraulic system features a dedicated implement pump to ensure adequate hydraulic power is available. The D8R features optional dual blade tilt for further productivity enhancement.
Comfortable, Non-tiring OperationLow effort controls and a Cat Contour Series Seat, with wide retractable seat belt, provides an environment that reduces fatigue and maximizes productivity.
Steering and Transmission ControlThe operator uses a single handle control to perform all direction and gear selection. The tiller bar control allows the operator to work more precisely in close areas around structures, grade stakes and other machines. Differential Steering provides the finest modulation in the industry in maintaining power to both sides of the track during a turn and maintaining constant center-line speed. Hydraulics via a separate dedicated pump, are used to steer and has a dedicated pump to deliver more load-moving power during turns.
Clear Full-circle ViewA tapered hood and notched fuel tank give the operator a clear line of site to front and rear work areas.
Power and reliabilityCaterpillar is one of the world’s leading engine manufacturers. Every component of a Cat engine is carefully designed with precise controls that optimize power and fuel efficiency with a modular design to enhance the engine’s serviceability.
EngineLarge displacement and high torque rise allow the D8R to doze through tough material. The high displacement rating allows long hours of continuous operation. Turbocharging and after-cooling provide high horsepower while keeping RPM and exhaust temperatures low. The efficient, direct injection fuel system keeps fuel costs down. A steel spacer between the block and head eliminates the need for block counter-bores, extending block life. Engine components live longer because oil cooled pistons and full-length water cooled cylinder liners provide maximum heat transfer for longer component life. The cylinder heads also utilize additional coolant passages to provide maximum cooling to the rear of the engine. Stellite-faced valves, through-hardened crankshaft journals and steel-backed, copper-bonded aluminum bearings help assure reliable performance in the toughest duty.
Cooling SystemThe Advanced Modular Cooling System (AMOCS) has excellent cooling capacity with increased air flow. AMOCS allows the machine to be operated in the most demanding environments. Two pass cooling increases the relevant surface area for maximum cooling capacity. Servicing is quick and easy with individual radiator cores that can be quickly replaced.
Powerful efficiencyThe power shift transmission, unique Cat torque divider and differential steering are matched with the 3406C engine to deliver outstanding power and reliability. The integrated system efficiently puts more power to the ground, utilizing more of the available horsepower, so you get more done with less.
Differential Steering SystemDifferential steering puts you on the leading edge of productivity by maintaining power to both tracks while turning. When one track speeds up, the other slows down an equal amount. Maneuverability - especially with large blade loads - is improved, as well as cycle times in other applications. Greater load capacity, power and speed control are possible in soft underfoot conditions on steep slopes because both tracks are powered during turns. A single tiller bar controls all directional and speed functions for ease of operation.
Torque DividerA unique Cat torque divider sends 70 percent of engine torque through a converter and 30 percent through a direct drive shaft for greater driveline efficiency and higher torque multiplication. The D8R torque divider provides high reliability and low dynamic torque. Components are designed to absorb full engine power, and deliver an optimum combination of operator efficiency and driveline reliability.
Planetary Power Shift TransmissionThe transmission includes three speeds forward and three speeds reverse, featuring thick, large diameter, high capacity, oil-cooled clutches. These clutches provide higher torque capacity and increase service life. The planetary power shift transmission has a proven, robust mechanical control system. Modular transmission and differential slide into rear case for servicing ease, even when a ripper is installed. An oil-to-water cooler provides maximum cooling capacity, and forced oil flow lubricates and cools clutch packs for maximum clutch life.
Rugged design for maximum serviceThe foundation of every Cat dozer is a rugged frame built to absorb high impact shock loads and twisting forces. Castings provide added strength to the main case and equalizer bar saddle. The pivot shaft runs through the mainframe and connects the roller frame for independent oscillation. The full-length 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. The pinned equalizer bar gives the roller frames the ability to oscillate up and down to better match ground contours for maximum traction and operator comfort. Equalizer bar end pins are oil filled with limited slip seals for longer life and reduced repair costs. A low friction, no maintenance bushing is used in the saddle connection and resilient pads restrain equalizer bar oscillation. The D8R also features the tag-link design to mount the blade closer to the machine for excellent maneuverability, machine balance and blade penetration. The tag-link provides solid lateral stability and eliminates the need for diagonal bracing since it transfers side loads to the mainframe instead of dozer push-arms.
Proven productivitySince its ground-breaking introduction in 1978, the Cat elevated sprocket undercarriage arrangements allow optimized balance for best possible performance in each application. This is a field-proven design that offers outstanding machine performance and longer component life. Ground and implement shock loads are transferred to the mainframe to protect final drives, axles and steering components from harsh impacts for longer component life. The elevated sprocket design gives the operator excellent sight lines to the blade, sides and back of the machine. However, machine center of gravity remains low, offering excellent stability, balance and traction. The suspended undercarriage design absorbs impact loads to reduce the shock loads transferred to the undercarriage by up to 50 percent in uneven terrain. The bogie suspension conforms closely to the ground providing up to 15 percent more ground contact, especially in hard, uneven terrain. Higher traction means less slippage, better balance, and a smoother ride. Modular power train components make it quick to remove and repair the transmission, final drives, steering differential or brakes. Modular undercarriage components simplify service. Lifetime lubricated idlers and track/carrier rollers provide the ability to re-use internal components and rebuild or reshell components. This reduces owning and operating costs, and saves raw materials and natural resources.
Sealed and Lubricated UndercarriageStandard on the D8R is Sealed and Lubricated Track with a Cat Positive Pin Retention (PPR) system and is designed for high-impact and high load applications. The PPR is an exclusive Caterpillar design locks the link to the pin to ensure internal lubrication between track pin and bushing is maintained.
SystemOne™ UndercarriageOptional SystemOne undercarriage can help reduce total undercarriage owning and operating costs in many applications. SystemOne features lifetime sealed and lubricated cartridges to eliminate bushing turns, and sprockets require no replacement during the life of the chain and designed to work and wear as a system.
Equipped for the job
Load Sensing HydraulicsField-proven, load-sensing hydraulics respond to operating requirements by automatically and continually adjusting hydraulic power to maximize work tool efficiency.
Blade design features a strong box-section design, made from Cat DH-2™ steel with high tensile strength to stand up to the most severe applications. Heavy moldboard construction and hardened bolt-on cutting edges and end bits add strength and durability.
- The Semi-Universal blade is built for tough applications where penetration is more important than capacity. The “SU” blade combines aggressive penetrating and loading material characteristics with blade wings designed for superior load retention and penetration in tightly packed materials.
- Optional blades include an Angle and Universal blades for specific applications.
Single and multi-shank adjustable parallelogram rippers are made to penetrate tough material fast and rip thoroughly for use in a variety of materials.
- Single-Shank rippers allow operators to adjust the shank depth from the seat using an optional single shank pin puller. Large upper frame view hole improves ripper tip visibility. Heat-treated spacer bars in the ripper carriage extend pocket life and reduce shank notching. Large one-piece shank is available in deep rip configuration.
- Multi-Shank rippers tailor the tractor to the material by using one, two or three shanks.
Rear CounterweightOptimize balance for backing up steep slopes or increasing performance in heavy dozing applications. Proper machine balance also helps the undercarriage wear more evenly. Rear counterweights are recommended if another rear attachment is not specified.
WinchSee your Cat dealer for available Winch options best suited to your applications.
Stay up and runningCat machines are designed with serviceability in mind. Modular components, easy access to regular service points and features that enable quicker diagnostics all add up to less maintenance time and more time on the job.
Cat Electronic Monitoring System (EMS)The D8R features a monitoring system that keeps the operator informed on the operating conditions of the machines. Simple easy to read gauges and warning system to the operator provides the operator with important feedback and allows them to continue with the task at hand. The Gauge Group includes engine coolant temperature, power train oil temperature, hydraulic oil temperature and fuel level. The EMS provides alert indicators that monitor coolant flow, coolant temperature, engine oil pressure, transmission oil temperature, transmission oil filter, alternator and hydraulic oil filter.
S·O·SSM AnalysisMonitor machine health and identify key maintenance needs before they lead to downtime through Cat S·O·S Services. Cat machines feature live sampling ports for the engine oil, power train hydraulics and coolant. Cat oil sampling offers accurate analysis using tests designed by Caterpillar for Cat products, as well as knowledgeable interpretation of the results.
Built to be RebuiltMajor components on the D8R are built to be rebuilt, extending the useful life of the machine. Machine and component rebuilds save money, and offer a sustainability element by saving raw materials and natural resources. See your Cat dealer to learn more about rebuild options.
Total Customer Support
Renowned dealer supportOnly Cat machines come with the industry’s best sales and service support - the Cat dealer network. From helping you choose the right machine to ongoing support, your Cat dealer provides the best in sales and service. Manage your costs with preventive maintenance programs like Custom Track Service, S·O·S Services and guaranteed maintenance contracts. Stay productive with best-in-class parts availability. Your Cat dealer can even help with operator training to help you boost your profits. And when it’s time for replacement, your Cat dealer can help you save even more with Genuine Cat Remanufactured parts. Remanufactured power train and hydraulic components cost less, but come with the same warranty and reliability as new products. Talk with your Cat dealer to learn more about reducing waste and saving money through Cat Remanufacturing.