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Medium Dozers

From large to small, mining to finishing work, you are certain to find a Cat® Dozer to match your needs. We offer several configurations and special custom packages to meet your specific needs.

D6R Track-Type Tractors

Caterpillar has been the world leader in Track-Type Tractors for more than a century. The D6R combines legendary Cat durability and reliability with proven technology designed to reduce emissions while improving your productivity and your bottom line. From rugged structures to fully integrated engine and power train systems, the D6R is a world-class tractor built to help you produce the highest quality work in a variety of applications.

  • Specification Summary

  • Engine ModelCat® C9 ACERT™
  • Flywheel Power145.0 kW
  • Operating Weight18325.0 kg
  • Operating Weight – STD18325.0 kg
  • Operating Weight – STD S18225.0 kg
  • Product Brochure


Product Details


Engine Model Cat® C9 ACERT™
Flywheel Power 145.0 kW


Operating Weight 18325.0 kg
Operating Weight – STD 18325.0 kg
Operating Weight – STD S 18225.0 kg
Shipping Weight – STD 15017.0 kg
Operating Weight – STD A 18669.0 kg
Operating Weight – STD SU 18325.0 kg
Operating Weight – XL 20080.0 kg
Shipping Weight – XL 17012.0 kg
Operating Weight – XL A 20257.0 kg
Operating Weight – XL SU 20080.0 kg
Operating Weight – LGP 21715.0 kg
Shipping Weight – LGP 19153.0 kg
Operating Weight – LGP S 21715.0 kg


SU-Blade Capacity 5.61 m3
SU-Blade Width 3260.0 mm
S-Blade Capacity 3.89 m3
S-Blade Width 3360.0 mm
A-Blade Capacity 3.93 m3
A-Blade Width 4166.0 mm
LGP S-Blade Capacity 3.75 m3
LGP S-Blade Width 4063.0 mm


1.0 Forward 3.8 km/h
2.0 Forward 6.6 km/h
3.0 Forward 11.5 km/h
1.0 Reverse 4.8 km/h
2.0 Reverse 8.4 km/h
3.0 Reverse 14.6 km/h


Width of Shoe – LGP 915.0 mm
Shoes/Side – XL 41
Shoes/Side – LGP 45
Grouser Height 65.0 mm
Pitch 203.0 mm
Ground Clearance 383.0 mm
Track Gauge – LGP 2286.0 mm
Track on Ground – XL 2871.0 mm
Track on Ground – LGP 3275.0 mm
Ground Pressure – XL 0.623 kg/cm2
Ground Contact Area (STD Track) – LGP 5.99 m2
Ground Contact Area (STD Track) – STD 2.98 m2
Ground Contact Area (STD Track) – XL 3.22 m2
Ground Pressure – LGP 0.362 kg/cm2
Ground Pressure – STD 0.614 kg/cm2
Shoes/Side – STD 39
Track Gauge – STD/XL 1880.0 mm
Track on Ground – STD 2664.0 mm
Width of Shoe – STD/XL 560.0 mm

Service Refill Capacities

Fuel Tank 424.0 L
Cooling System 76.8 L
Engine Crankcase 28.0 L
Power Train 145.7 L
Final Drives (each) 13.6 L
Roller Frames (each) 24.6 L
Pivot Shaft Compartment 5.0 L
Hydraulic Tank 51.5 L

Hydraulic Controls – Maximum Operating Pressure

Bulldozer 19300.0 kPa
Bulldozer Tilt 19300.0 kPa
Tilt Cylinder 19300.0 kPa
Ripper (Lift) 19300.0 kPa
Ripper (Pitch) 19300.0 kPa
Steering 40000.0 kPa

Engine – XL/LGP

Bore 112.0 mm
Displacement 8.8 L
Engine Model Cat® C9 ACERT™
Maximum Power at 1,800 rpm – Gross Power – ISO 14396 169.0 kW
Maximum Power at 1,800 rpm – Net Power – ISO 9249 158.0 kW
Net Power – ISO 9249 145.0 kW
Rated Power at 2,000 rpm – Gross Power – ISO 14396 163.0 kW
Rated Power at 2,000 rpm – Net Power – ISO 9249 145.0 kW
Stroke 149.0 mm


ROPS/FOPS ROPS meets criteria SAE J395, SAE 1040 MAY94, ISO 3471-1994/FOPS meets ISO 3449-1992 Level II
Cab Meets appropriate standards as listed in Footnotes.
Brakes Brakes meet criterion SAE J/ISO 10265 MAY98

Hydraulic Controls – Pump

Pump Capacity at 6900.0 kPa
RPM at Rated Engine Speed 2125.0 RPM
Pump Output 214.0 L/min
Lift Cylinder Flow 190.0 L/min
Tilt Cylinder Flow 80.0 L/min
Ripper Cylinder Flow 160.0 L/min

Engine – STD

Bore 112.0 mm
Displacement 8.8 L
Engine Model Cat® C9 ACERT™
Maximum Power at 1,800 rpm – Gross Power – ISO 14396 152.0 kW
Maximum Power at 1,800 rpm – Net Power – ISO 9249 139.0 kW
Net Power – ISO 9249 130.0 kW
Rated Power at 2,000 rpm – Gross Power – ISO 14396 148.0 kW
Rated Power at 2,000 rpm – Net Power – ISO 9249 131.0 kW
Stroke 149.0 mm


Weight – with Three Shanks 1782.0 kg
Type Fixed Parallelogram
Number of Pockets 3
Overall Beam Width 2202.0 mm
Beam Cross Section 216 × 254 mm (8.5 × 10 in)
Maximum Clearance Raised (under tip, pinned in bottom hole) 511.0 mm
Maximum Penetration 500.0 mm
Maximum Penetration Force 6603.0 kg
Pryout Force 9134.0 kg

Hydraulic Controls – Main Relief Valve

Pressure Setting 42000.0 kPa

Cab and Controls

Productivity, safety, comfort

Operator Environment

The D6R features a choice of 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 Monitoring System Display gives operators and service technicians easy access to operating and maintenance information. 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 can also feature optional dual pane glass for extreme cold weather environments for further operator comfort.

Dozer and Ripper Controls

All D6R controls are ergonomically designed for low-effort and ease of operation. The dozer and ripper control levers feature pilot-operated hydraulics for added operator comfort and precise control. When the AccuGrade system is activated, the dozer is electro-hydraulically controlled. When the operator returns to manual control, the dozer is operated through the pilot hydraulic system.

Throttle Rocker Switch

With the touch of a finger, the rocker switch activates high or low idle. A decelerator pedal gives the operator full control of engine speed when the rocker switch is in the high idle position. Engine speed can also be easily set in any range between high and low idle by simultaneously using the decelerator pedal to set the desired speed and pressing the throttle switch in for three seconds.

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.

Work Tool Lock-Out Switch

The work tool lock-out valve prevents inadvertent operation of the hydraulic work tool attachments for added safety.


Power and reliability

Caterpillar is one of the world’s leading engine manufacturers. Every component of a Cat® engine is carefully designed to maximize durability and reliability. Precise controls optimize power and fuel efficiency while reducing emissions. Modular design and advanced electronic diagnostics enhance the engine’s serviceability.

ACERT Technology

The D6R features a Cat C9 engine with ACERT™ Technology. A series of Caterpillar innovations provide advanced electronic control, precision fuel delivery and refined air management, resulting in outstanding performance and lower emissions. To help customers work within expanding global regulatory requirements, the C9 engine with ACERT Technology has been certified to China Stage 2 (GB 20891-2007) emissions compliance.


The air-to-air aftercooler (ATAAC) - part of the advanced air management system - brings cool air to the engine. This increases life, reduces emissions, and helps maximize fuel efficiency.

Fuel Delivery

Multiple injection fuel delivery very precisely controls the combustion cycle. This lowers combustion chamber temperatures to reduce emissions and translates into more work output per unit of fuel. The Hydraulic Electronic Unit Injector (HEUI™) fuel system controls injection pressure over the entire engine operating speed range for complete control over injection timing, duration, and pressure.

Fractured Split Connecting Rods

Design creates near-perfect joint alignment, maximizing rod bearing life. This, in combination with a high efficiency oil filter, ensures long engine life.

Cat Advanced High Efficiency Oil Filter

Advanced oil filters provide outstanding contamination control for a much cleaner running engine. The advanced filtration is accomplished without the shorter change intervals often required with other brands.

Cooling System

The all new cooling system includes engine radiator, Air-to-Air After Cooler (ATAAC), and hydraulic oil cooler. Engine radiator consists of two units of bar plate cooler, which are connected at the top with hose. The aluminum bar plate construction provides improved durability to debris plugging, abrasion and corrosion resistance.

Power Train

Powerful efficiency

The power shift transmission, unique Cat torque divider and differential steering are matched with the C9 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 some 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 Divider

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 D6R 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. A reinforced saddle, welded front cross-member and steel castings on the main case add to the overall strength. The pivot shaft is bolted to the mainframe and connects to the rear roller frames to allow independent oscillation. The pivot shaft distributes impact loads through 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. Bolted end pins offer longer life and reduce downtime with improved serviceability and reliability. A remote lubrication point in the engine compartment provides easy access to lubricate the center pin of the equalizer bar as part of scheduled maintenance practices. 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. 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.


Proven productivity

Since its ground-breaking introduction in 1978, more than 100,000 Cat Track-Type Tractors have been sold with the elevated sprocket “high drive” undercarriage. This is a field-proven design that offers outstanding machine performance and 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.

Heavy Duty Undercarriage

Standard Heavy Duty undercarriage components are designed for extended wear life in abrasive conditions and high impact applications like forestry, side-slopes, or working in rocky or uneven terrain. Heavy duty track is designed for enhanced penetration. The leading and trailing edges of each track shoe overlap the adjacent shoe to increase durability and component life.

SystemOne™ Undercarriage

Optional SystemOne undercarriage for XL and LGP machines 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 designed to work and wear as a system. Three (3) Undercarriage Arrangements are available:
  • Standard arrangement - A general purpose undercarriage that performs well in many applications with firm underfoot conditions
  • XL arrangement - More track to the front positions the tractors weight rearward, which increases traction and performance in grading applications.
  • LGP arrangement - Specifically designed to work in soft or wet conditions. Wide track shoes, long track frames, and a wider machine gauge increases ground contact area and reduces ground pressure for improved stability requiring flotation in swampy conditions.

Track Shoes

Moderate Service and Extreme Service track shoes are available for both Heavy Duty and SystemOne Undercarriage to help optimize the machine based on its most frequent applications.

Work Tools

Equipped for the job

L-Shaped Push Arms

L-shaped push arms bring the blade closer to the machine, providing excellent maneuverability, balance and blade penetration. The design provides solid lateral stability and better cylinder positions for constant pry-out independent of blade height.

Load Sensing Hydraulics

Field-proven, load-sensing, pilot controlled hydraulics respond to operating requirements by automatically and continually adjusting hydraulic power to maximize work tool efficiency.

Cat Blades

Blade designs feature a strong box-section design, made from 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.
  • Semi-Universal Blade - designed for superior load retention and penetration in tightly packed materials.
  • Straight Blade - versatile blade, ideal for heavier materials.
  • Angle Blade - secured by outside-mounted push arms using a pinned connection that allows blade angling and tilting, left or right. Blade angle is changed manually and blade tilt is changed hydraulically.

Multi-Shank Ripper

The three-shank parallelogram style ripper is available with curved or straight ripper shanks. This ripper is an excellent tool for preparing hard-packed material before dozing operations.

Rear Counterweight

Optimize balance for backing up steep slopes or increasing performance in heavy dozing applications and if another rear attachment is not specified.


See your Cat dealer for available Winch options best suited to your applications.

Integrated Electronic Solutions

Technology to reduce costs and improve productivity

AccuGrade System for Track-Type Tractors

The AccuGrade system automates blade control for improved grading accuracy and more cost effective operation. Sensors calculate precise blade slope and elevation, then automatically adjust the blade to maintain grade. Automated blade control improves efficiency by reaching grade faster and in fewer passes, reducing the need for traditional survey stakes or grade checkers.

AccuGrade™ Ready Option

AccuGrade systems and controls can be integrated from the factory, making system installation and setup quick and easy. Integration also provides greater system protection and reliability.

AccuGrade Systems

Three (3) systems are available to match the AccuGrade Ready Option integrated ex-factory selection. All calculate necessary blade adjustments to achieve grade, make automatic blade adjustments and calculate cut/fill requirements.
  • LASER enables automatic blade control to execute 2D profiles and requires direct line of sight to a LASER transmitter. Field-proven and versatile, the dual laser system is ideal for fine grading of sites with flat, single or dual slope surfaces, such as industrial, commercial and residential building sites.
  • Universal Total Station (UTS) is a high accuracy dynamic system to track a machine and monitor blade positioning. The UTS instrument continuously measures the target’s position and transmits real-time positioning data to the operator via the in-cab display showing the exact position of the blade in relation to desired design.
  • Global Satellite Navigation control systems are the best solution when a site involves contours, rather than single or dual slope planes. This technology uses Satellite Navigation to compare a blades position to a 3D computerized site plan and signals the operator, or automatically through the hydraulic system, to maneuver the blade to achieve the design.

Product Link

The optional Product Link* system is a factory installed or easily retrofitted wireless system that simplifies equipment fleet tracking. Using satellite or cellular technology, it automatically reports key machine parameters such as location, machine hours, active and logged service codes and security alarms. * Product Link licensing not available in all areas.


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 Monitoring System

The D6R features a monitoring system that provides feedback to operators with easy-to-read gauges and warning lamps that allows the operator to concentrate on the job at hand. With the use of a Cat Electronic Technician (ET), your Cat dealer can determine historical performance parameters of the machine. The Cat Monitoring System is designed to:
  • Reduce downtime
  • Match software to unique application needs
  • Provide feedback on machine performance events

Scheduled Oil Sampling (S•O•SSM) Analysis

Monitor machine health and identify key maintenance needs before they lead to downtime through Cat Scheduled Oil Sampling. 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 D6R 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.
    •  Alarm, backup
    •  Alternator, 70-Amp, brushless
    •  Batteries, 2 maintenance free 12V (24V system)
    •  Converter, 12V, 10-Amp w/2 outlets
    •  Connector, diagnostic
    •  Lights, 4 (2 mounted on the lift cylinder facing forward, 2 mounted on the fuel tank facing rearward)
    •  Electric start, 24V
    •  Horn, forward warning
    •  Air conditioner, under-hood
    •  Armrest, adjustable
    •  Cab, ROPS/FOPS
    •  Decelerator pedal
    •  Differential steering control
    •  Electronic Monitoring System (EMS) with coolant temperature, power train oil, hydraulic oil and fuel gauge, tachometer, and diagnostic functions
    •  Foot pads, dash
    •  Heater
    •  Hydraulic controls, pilot operated with electronic deactivation switch
    •  Mirror, rearview
    •  Radio ready
    •  Seat, adjustable contour suspension
    •  Seatbelt, retractable, 76 mm (3 in)
    •  Throttle switch, electronic
    •  Wipers, two (2) speed
    •  Cat C9 (8.8 L) diesel
    •  Aluminum bar plate radiator cooling system
    •  Air cleaner, precleaner with strata tube dust ejector
    •  Air filter with electronic service indicator
    •  After-cooler, air to air (ATAAC)
    •  Coolant, extended life
    •  Fan, blower, direct drive
    •  Final drives, 3-planet single reduction planetary
    •  Fuel priming pump, electric
    •  Muffler with mitered stack
    •  Parking brake
    •  Prescreener
    •  Torque divider
    •  Planetary transmission, mechanical power shift 3F/3R speeds
    •  Turbocharger, waste-gate
    •  Water separator
  • Cat C9 (8.8 L) diesel
    • Aluminum bar plate radiator cooling system
      • Air cleaner, precleaner with strata tube dust ejector
        • Air filter with electronic service indicator
          • After-cooler, air to air (ATAAC)
            • Coolant, extended life
              • Fan, blower, direct drive
                • Final drives, 3-planet single reduction planetary
                  • Fuel priming pump, electric
                    • Muffler with mitered stack
                      • Parking brake
                        • Prescreener
                          • Torque divider
                            • Planetary transmission, mechanical power shift 3F/3R speeds
                              • Turbocharger, waste-gate
                                • Water separator
                                  • UNDERCARRIAGE
                                    •  Carrier rollers, lifetime lubricated (XL and LGP)
                                    •  Equalizer bar
                                    •  Guards, end track guiding
                                    •  Guards, center track guiding (LGP)
                                    •  Idlers, lifetime lubricated
                                    •  Rollers, lifetime lubricated track
                                    •  Track roller frames, tubular
                                    •  Track adjusters, hydraulic
                                    •  Sprocket rim segments, replaceable
                                    •  Track, HD S & L, moderate service
                                    •  Standard arrangement: 560 mm (22 in), 39-section
                                    •  XL arrangement: 560 mm (22 in), 41-section
                                    •  LGP arrangement: 915 mm (36 in), 45-section
                                  • OTHER STANDARD EQUIPMENT
                                    •  Parts book - CD ROM
                                    •  Operation and Maintenance Manual - Paper
                                    •  Engine enclosures, perforated
                                    •  Front pull device
                                    •  Guards, hinged bottom
                                    •  Mounting, lift cylinder
                                    •  Lift cylinder with lines, LH
                                    •  Lift cylinder with lines, RH
                                    •  Hood, perforated
                                    •  Hydraulics, load sensing, dozer lift and tilt
                                    •  Oil cooler, hydraulic
                                    •  Product Link ready
                                    •  Radiator doors, louvered, hinged, fan blast deflector
                                    •  Sampling ports
                                    •  Engine oil
                                    •  Power train oil
                                    •  Hydraulic oil
                                    •  Engine coolant
                                    •  Tool box
                                    •  Vandalism protection
                                    •  Padlocks for battery compartment and fuel drain valve
                                    •  Padlock capable compartments
                                  • Parts book - CD ROM
                                    • Operation and Maintenance Manual - Paper
                                      • Engine enclosures, perforated
                                        • Front pull device
                                          • Guards, hinged bottom
                                            • Mounting, lift cylinder
                                              • Lift cylinder with lines, LH
                                                • Lift cylinder with lines, RH
                                                  • Hood, perforated
                                                    • Hydraulics, load sensing, dozer lift and tilt
                                                      • Oil cooler, hydraulic
                                                        • Product Link ready
                                                          • Radiator doors, louvered, hinged, fan blast deflector
                                                            • Sampling ports
                                                              • Engine oil
                                                                • Power train oil
                                                                  • Hydraulic oil
                                                                    • Engine coolant
                                                                      • Tool box
                                                                        • Vandalism protection
                                                                          • Padlocks for battery compartment and fuel drain valve
                                                                            • Padlock capable compartments

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