In the 130-310 hp range, you can count on our medium-size dozers to combine incredible versatility to handle a wide range of jobs with innovations that help you do those jobs better, faster and more efficiently. From first pass to finish grade, Cat® medium-size dozers give you world-class performance and industry-leading resale value.
Caterpillar has been the world leader in Track-Type Tractors for more than a century. The D8R combines legendary Cat durability and reliability with proven technology designed to improve your productivity and your bottom line. From rugged structures to fully integrated engine and power train systems, the D8R is a world-class tractor built to help you produce the highest quality work in a variety of applications.
Engine Model Cat® 3406C DITA Flywheel Power 226.0 kW Bore 137.0 mm Stroke 165.0 mm Displacement 14.6 L Engine Power (Maximum) – ISO 14396 247.0 kW Engine Power (Maximum) – ISO 14396 (DIN) 247.0 kW Engine Power (Maximum) – SAE J1995 252.0 kW Net Power (Maximum) – 80/1269/EEC 239.0 kW Net Power (Maximum) – ISO 9249/SAE J1349 239.0 kW Net Power (Maximum) – ISO 9249/SAE J1349 (DIN) 239.0 kW Net Power (Rated at 2,100 rpm) – 80/1269/EEC 226.0 kW Net Power (Rated at 2,100 rpm) – ISO 9249/SAE J1349 226.0 kW Net Power (Rated at 2,100 rpm) – ISO 9249/SAE J1349 (DIN) 226.0 kW
Operating Weight 37920.0 kg Operating Weight – LGP 35176.0 kg Operating Weight – Standard 37920.0 kg Shipping Weight – LGP 29257.0 kg Shipping Weight – Standard 28365.0 kg
1.0 Forward 3.5 km/h 2.0 Forward 4.7 km/h 3.0 Forward 6.2 km/h 1.0 Reverse 8.1 km/h 2.0 Reverse 10.8 km/h 3.0 Reverse 13.9 km/h
Lift Cylinder Flow 325.0 L/min Tilt Cylinder Flow 170.0 L/min Pump Capacity at 7000.0 kPa Pump Output 239.0 L/min Pump Type – Implements Variable Displacement Piston RPM at Rated Engine Speed 2100.0 RPM Ripper Cylinder Flow 190.0 L/min
HYDRAULIC CONTROLS – MAIN RELIEF VALVE
Pressure Setting 24100.0 kPa
HYDRAULIC CONTROLS – PUMP
Pump Capacity 38500.0 kPa Pump Type Variable Displacement Piston RPM at Rated Engine Speed 2231.0 RPM Pump Output 289.0 L/min Lift Cylinder Flow 190.0 L/min Tilt Cylinder Flow 80.0 L/min Ripper Cylinder Flow 190.0 L/min
HYDRAULIC CONTROLS – MAIN RELIEF VALVE
Pressure Setting 42000.0 kPa
HYDRAULIC CONTROLS – MAXIMUM OPERATING PRESSURE
Bulldozer, Lift 24100.0 kPa Bulldozer, Tilt 24100.0 kPa Ripper, Lift 24100.0 kPa Ripper, Tilt 24100.0 kPa Steering 38000.0 kPa
UNDERCARRIAGE – STANDARD
Ground Clearance 613.0 mm Ground Contact Area 3.91 m2 Ground Pressure (ISO 16754) 95.1 kPa Grouser Height 78.0 mm Length of Track on Ground 3206.0 mm Pitch 216.0 mm Shoe Type Moderate Service Shoes/Side 44 Track Gauge 2083.0 mm Track Rollers per Side 8 Width of Shoe 610.0 mm
UNDERCARRIAGE – LGP
Ground Clearance 613.0 mm Ground Contact Area 6.19 m2 Ground Pressure (ISO 16754) 55.8 kPa 55.8 kPa 78.0 mm Length of Track on Ground 3206.0 mm Pitch 216.0 mm Shoe Type Moderate Service Shoes/Side 44 Track Gauge 2337.0 mm Track Rollers per Side 8 Width of Shoe 965.0 mm
SERVICE REFILL CAPACITIES
Fuel Tank 625.0 L Cooling System 92.0 L Power Train 144.0 L Final Drives (each) 13.5 L Engine Crankcase 32.5 L Hydraulic Tank 72.0 L Pivot Shaft 40.0 L
A – Blade Capacity 4.7 m3 A – Blade Width 4978.0 mm SU LGP – Blade Capacity 8.5 m3 SU LGP – Blade Width 4400.0 mm SU – Blade Capacity 8.7 m3 SU – Blade Width 3937.0 mm U – Blade Capacity 11.7 m3 U – Blade Width 4262.0 mm
Maximum Penetration 780.0 mm Maximum Penetration 1135.0 mm Maximum Penetration Force 127.4 kN Maximum Penetration Force 124.2 kN Number of Pockets 3 Number of Pockets 1 Overall Beam Width 2464.0 mm Pryout Force 222.8 kN Pryout Force 227.9 kN Type Adjustable Parallelogram Single-Shank Type Adjustable Parallelogram Multi-Shank Weight with Standard Single Shank 4085.0 kg Weight with Three Shanks 4877.0 kg
ROPS/FOPS Standards Cab Meets the appropriate standards as listed in Footnotes Brakes Brakes meet the standard SAE J/ISO 10265:2008
CAB AND CONTROLS
Productivity, safety, comfort
The 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 CONTROLS
All 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 OPERATION
Low 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 CONTROL
The 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 VIEW
A tapered hood and notched fuel tank give the operator a clear line of site to front and rear work areas.
The 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 SYSTEM
Differential 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.
A 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 TRANSMISSION
The 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 service
The 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.
Since 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 UNDERCARRIAGE
Standard 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.
Optional 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 HYDRAULICS
Field-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.
Optimize 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.
See your Cat dealer for available Winch options best suited to your applications.
Stay up and running
Cat 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.
Monitor 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 REBUILT
Major 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 support
Only 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, Scheduled Oil Sampling (S·O·SSM) analysis, 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.
- D8R TRACK TYPE TRACTORS specalogs Click here to download
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