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Small 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.

D3K Track-Type Tractor

The Cat® D3K Track-Type Tractor delivers superior performance and comfort while reducing your operating costs. The large spacious cab provides a comfortable work area. Intuitive seat-mounted controls are easy to use for greater job accuracy and efficiency. The innovative SystemOne undercarriage reduces maintenance time and costs - significantly impacting your bottom line. The AccuGrade Laser and GPS Systems help you get to grade faster, with fewer passes and less manpower. From first cut to finish grade, the D3K sets the standard.

  • Specification Summary

  • Engine ModelCAT C4.4 ACERT™
  • Power - Net55.2 kW
  • Power - Gross60.5 kW
  • Displacement4400.0 cm3
  • Caterpillar55.2 kW
  • Product Brochure


Product Details


Engine Model CAT C4.4 ACERT™
Power - Net 55.2 kW
Power - Gross 60.5 kW
Displacement 4400.0 cm3
Caterpillar 55.2 kW
ISO 9249 55.2 kW
EEC 80/1269 55.2 kW
SAE J1349 55.2 kW
Bore 105.0 mm
Stroke 127.0 mm


Operating Weight - XL 7795.0 kg
Operating Weight - LGP 8093.0 kg


Drive Pumps 2
Track motors 2
Relief valve settings 47650.0 kPa
Maximum travel speed - forward 9.0 km/h
Maximum travel speed - reverse 10.0 km/h

Service Refill Capacities

Fuel tank 195.0 L
Crankcase and filter 11.0 L
Final drives, XL (each side) 10.0 L
Final drives, LGP (each side) 10.0 L
Cooling system 22.4 L
Transmission/hydraulic tank 59.5 L

Hydraulic Controls

Pump Output 73.5 L/min
Relief valve setting 20600.0 kPa


ROPS SAE J397-OCT95, SAE J1040-MAY94, ISO 3471-94, ISO 3164-95
FOPS SAE J231-JAN81, ISO 3449-92


Weight 610.0 kg
Winch Drive Hydrostatic
Control Hydraulic
Speed Variable
Winch length 705.0 mm
Overall width 741.0 mm
Drum diameter 254.0 mm
Drum width 274.0 mm
Throat clearance 171.5 mm
Rope diameter - recommended 16.0 mm
Rope diameter - optional 19.0 mm
Drum capacity - recommended cable 113.0 m
Drum capacity - optional cable 78.0 m
Maximum line pull - bare drum 18144.0 kg
Maximum line pull - full drum 11340.0 kg
Maximum line speed - bare drum 40.0 m/min
Maximum line speed - full drum 63.0 m/min


Type Parallelogram
Number of Shanks 3
Maximum digging depth 337.5 mm
Maximum reach at ground line 766.0 mm
Maximum ground clearance under tip 448.0 mm
Overall width 1710.0 mm
Height 165.0 mm
Weight 554.0 kg


Shoe width - XL 406.0 mm
Shoe width - LGP 635.0 mm
Length of track on ground - XL 2095.0 mm
Length of track on ground - LGP 2095.0 mm
Track gauge - XL 1495.0 mm
Track gauge - LGP 1725.0 mm
Ground contact area - XL 17011.0 cm2
Ground contact area - LGP 26607.0 cm2
Ground pressure - XL 44.8 kPa
Ground pressure - LGP 29.7 kPa


Blade width - Intermediate 2921.0 mm
Blade width - XL 2646.0 mm
Blade width - LGP 3149.0 mm
Blade height - Intermediate 860.0 mm
Blade height - XL 910.0 mm
Blade height - LGP 860.0 mm
Blade capacity - Intermediate 1.5 m3
Blade capacity - XL 1.52 m3
Blade capacity - LGP 1.66 m3
Digging depth - Intermediate 573.0 mm
Digging depth - XL 573.0 mm
Digging depth - LGP 573.0 mm

Operator Station

Superior comfort keeps you productive, all day long.


The operator station is designed to keep operators comfortable, relaxed and productive throughout the long work shift. The D3K features:
  • Standard air conditioning with cab option
  • Spacious cab with generous leg room
  • Fully adjustable air suspension seat with a heated seat option for cold climates
  • Wide door openings for getting in and out of the cab easily
  • Operator sound level has been lowered inside the cab 4 dB(A) to an industry leading 80 dB(A) - ANSI/SAE J1166 OCT 98. This provides a quiet, comfortable working environment reducing fatigue and increasing their productivity.

Seat-Mounted Joystick Controls

For optimum comfort and precise control, the D3K features ergonomically designed seat-mounted controls. Seat-mounted controls isolate vibrations from the operator, and provide independent seat and controls adjustment. Individual wrist pads and armrests can be adjusted independently for optimum comfort.

Monitoring Package

Easy to read display provides vital system information. Buttons below the display allow the operator to select parameters for forward/reverse speed, blade response, steering response and decel pedal operation modes.

Dozer Blade Control

Ergonomic joystick is easy to use and reduces operator fatigue. The intuitive control makes operating the tractor easy for both new and experienced operators. The new handle shape conforms to your hand for precise blade raise and tilt control with less operator fatigue. A thumb roller controls the blade angle and requires less effort than other competitive machines. A blade shake button on top of the handle provides momentary quick tilt movement to easily remove material from the blade.

Combined Decel/Brake Pedal

Decel pedal serves combined function as engine speed control and brake. Depressing pedal through bottom of travel detent applies brake. Pedal mode can also be changed to control transmission speed with selection buttons on the display panel.

Hydrostatic Transmission Control

Seat-mounted controls improve productivity.

Speed and Direction Control

Speed, direction and steering are all controlled with a single, easy to use joystick for less effort and lower fatigue so you can get more done. The joystick controls direction and has three simple detented positions for travel—forward, reverse and neutral. With the machine in motion, simply move the joystick in the direction you wish to move the machine. The more the joystick is moved to the right or left, the tighter the turn. Regardless of ground conditions, steering is consistent and predictable.

Infinitely Variable Speed Control

The speed control thumb wheel mounted on the joystick is used to infinitely increase and decrease speed, letting the operator select the optimum speed for ground and job conditions. It also eliminates power interruption when changing speeds. A speed recall button on the joystick is used to select pre-determined speed settings.


The power turn feature lets you handle large loads around corners or through hard spots. Power turn capability improves mobility in soft underfoot conditions and is very effective on side slopes. Counter-rotation provides easy, quick maneuvering in tight areas or congested job sites.


ACERT™ technology reduces emissions, increases performance.

C4.4 ACERT Engine

The Cat® C4.4 is a 4.4 L (269 in3) displacement, four cylinder, inline configured engine equipped with a Caterpillar common rail fuel system. It uses ACERT Technology, a series of Caterpillar engineered innovations that provide advanced electronic control, precision fuel delivery and refined air management, resulting in outstanding performance and lower emissions. It meets the U.S. EPA Tier 3, EU Stage IIIA and Japan MOC Step 3 emissions standards.

Outstanding Performance

The C4.4 delivers increased horsepower, outstanding durability, reliability and improved response to change in loads, delivering power when you need it. The engine is more compact, allowing the cab to sit more forward - this improves machine balance and provides greater operator comfort. The engine and transmission control systems are integrated to optimize performance and fuel efficiency.


Lower owning and operating costs.

Durable Undercarriage Choices

Undercarriages are a significant portion of a tractor's owning and operating costs. Caterpillar offers two different undercarriage choices for lowest owning and operating costs for your application needs. A sealed and lubricated track (SALT) undercarriage is standard; SystemOne™ undercarriage is available as an option. Full length guarding on top of the track roller frame prevents abrasive material from falling down on moving parts. Machine balance is the key to good grading performance. Greater track length and a stable platform lead to optimum balance, allowing you to complete jobs easier and quicker with the D3K than with competitive machines.

SystemOne Undercarriage

With the revolutionary SystemOne undercarriage option, undercarriage maintenance time and costs are greatly reduced, lowering your costs and helping your bottom line. This innovative system uses a rotating bushing design which increases bushing life and eliminates the need for bushing turns. The rotating bushing combined with long wear life sprockets and center tread idler, increases the life and dependability of the entire system. Ideal for virtually any application or underfoot condition, the SystemOne undercarriage also features significantly less vibration for a better, more comfortable ride.

Sealed and Lubricated Track (SALT) Undercarriage

The standard sealed and lubricated track (SALT) undercarriage is built for long life in rugged conditions. Segmented sprockets are easy to replace and less expensive than replacing the complete sprocket hub.

Choice of Undercarriage Configurations

Track frames are available in extra long (XL) or low ground pressure (LGP) configurations. XL undercarriage provides increased ground contact area and flotation, superior balance and excellent finish grading. In addition, the LGP version also features a wider track shoe, increasing ground contact area for optimum flotation and stability on sloping and finish grading jobs. As an additional choice, the LGP undercarriage on the D3K is available with 762 mm (30 in) shoes.

AccuGrade™ Systems

Grade with increased accuracy.

Grade Control Systems

Caterpillar is revolutionizing the way to move material with new technology solutions for earthmoving machines - solutions that provide greater accuracy, higher productivity, lower operating costs and greater profits. The AccuGrade System is designed and integrated into the machine and hydraulic systems to create an automated blade control system that allows operators to grade with increased accuracy. The system uses machine-mounted sensors to calculate precise blade slope and elevation information.

AccuGrade Laser

AccuGrade Laser uses a laser transmitter and receiver for precise grade control. A laser transmitter on the worksite creates a constant grade reference over the work area. A digital laser receiver mounted on the machine captures the laser signal. The system calculates the blade adjustments necessary to achieve grade, makes automatic elevation adjustments typically performed by the operator and provides automatic blade control. The operator simply steers the machine. Automated blade control lets you achieve grade faster and in fewer passes, reducing the need for traditional survey stakes or grade checkers. The system also calculates cut/fill requirements for manual blade control. Work is completed faster, more accurately and with less manpower. AccuGrade Laser is well suited for flat work such as concrete pads and driveways.

AccuGrade GPS

AccuGrade GPS computes the machine positioning information and compares the position of the blade relative to the design plan. Information is provided to the operator via an in-cab display showing blade elevation, necessary cut/fill to achieve grade, blade position on the design surface and a graphical view of the design plan with machine location. AccuGrade GPS puts all the information the operator needs to complete the job in the cab for a greater level of control. Vertical and horizontal guidance tools visually guide the operator to the desired grade. Automated features allow the hydraulic system to automatically control blade adjustments to move the blade to grade. The operator simply uses the light bars to guide the machine for consistent, accurate grades and slopes, increasing productivity with less fatigue. AccuGrade GPS is best used for cut and contour jobs.

AccuGrade Monitor

Caterpillar is the first to integrate this system and its monitor into the machine’s dash for easy viewing during operation. The AccuGrade monitor is conveniently located, allowing the operator to view system information while keeping a straight line of sight to the blade corners.

Blade and Attachments

Cat work tools can handle tough dozing applications.

VPAT Blade

The VPAT blade is specifically designed for finish grading, backfilling ditches, cutting V ditches, windrowing, fill spreading, medium land clearing and heavy dozing. Built for rugged strength and durability, this 6-way blade allows for adjustable angle, tilt and pitch. Visibility to the blade corners and cutting edge is improved. This is especially critical when working near curbs and foundation structures. 

Parallelogram Ripper

The aggressive parallelogram ripper lets you do more productive ripper work. The parallel linkage design provides better penetration and maneuverability in tight working areas.

Forestry Options

An easier way to work in the woods. The D3K is available with the following features to aid in forestry applications:
  • Forestry blade, featuring additional guarding to protect the tractor from debris and to provide increased blade productivity
  • Cat hydrostatic winch, featuring excellent line pull at any speed and infinitely variable drum speed
  • Heavy-duty rear tank guard.

Hydrostatic Winch

Infinitely variable speed control.

Outstanding Control

The Cat hydrostatic winch offers outstanding control of the load with infinitely variable modulation of speed and pull. Mechanical winches force the operator to choose the gear ratio of the winch. The Cat hydrostatic winch eliminates this compromise by providing the speed of a standard winch and the pull of a low speed winch, all in one package. The result is:
  • Excellent line pull at any speed
  • Infinitely variable drum speed
  • Lower operator effort
  • Unmatched load control


Easy access and minimal maintenance requirements keep your machine on the job.

Easy Access

Long service intervals and easy maintenance keep the machine up and running and lower your owning and operating costs. A large, hinged door on the engine compartment provides easy access to all regular engine maintenance points, including engine fuel filters and water separator, the engine oil filter, the engine oil dipstick and filler, the fuel priming pump and the engine air pre-cleaner and filters. Grouped pressure taps allow for quick testing and troubleshooting of the hydraulic system. The hydraulic filters are all located in the left rear service compartment and are accessible from ground level.

Product Link

The optional Product Link system simplifies equipment fleet tracking. Using satellite or cellular technology, the system automatically reports information such as location, machine hours, active and logged service codes and security alarms.

Machine Security System

An optional Machine Security System (MSS) that utilizes a programmable key system that deters theft, vandalism and unauthorized usage. MSS uses electronically coded keys selected by the customer to limit usage by individuals or time parameters.

Customer Support

Unmatched support makes the difference.

Dealer Services

Your Cat dealer is ready to assist you with your purchase decision and everything after.
  • Make comparisons of the machines, with estimates of component life, preventative maintenance and cost of production.
  • Financing packages are flexible to meet your needs.
  • Your Cat dealer can evaluate the cost to repair, rebuild and replace your machine, so you can make the right choice.
  • For more information on Cat products, dealer services and industry solutions, visit us at www.cat.com.
    •  Horn
    •  Backup alarm
    •  Diagnostic connector
    •  Heavy duty 750 CCA batteries
    •  Alternator, 12V, 120 Amp, heavy duty brushless
    •  12V Starter
    •  ROPS/FOPS cab with sliding side windows and air conditioning
    •  Cat C500 comfort cloth air suspended seat with adjustable armrests
    •  76 mm (3-inch) retractable seat belt
    •  Adjustable seat-mounted, electro-hydraulic controls
    •  Foot rests
    •  Compact Instrument Cluster including: Gauges for engine coolant temperature, hydraulic oil temperature and fuel level 12 indicators digital display (ground speed, engine RPM, hour meter)
    •  Rotary throttle switch
    •  Travel speed limiter
    •  Independent forward/reverse speed settings
    •  Single pedal combining deceleration and braking functions
    •  Rearview mirror
    •  12V power port
    •  Coat hook
    •  Storage compartment
    •  Cup holder
    •  Heavy duty rubber floor mat
    •  Windshield washers and wipers, front and rear
    •  Caterpillar C4.4 ACERT diesel engine, turbocharged
    •  Aluminum bar plate cooling system (radiator, power train)
    •  Blower fan
    •  Air cleaner with precleaner, automatic dust ejection and under-hood intake
    •  Fuel priming pump with integrated fuel/ water separator
    •  Dual path, closed-loop hydrostatic transmission
    •  Under-hood muffler
    •  Hydraulics, 3 valve
  • Hydraulics, 3 valve
      •  SALT Undercarriage
      •  Lifetime lubricated track rollers (6) and idlers
      •  Carrier rollers
      •  Tracks, 41 sections - XL configuration 406 mm (16") LGP configuration 635 mm (25")
      •  Hydraulic track adjusters
    • SALT Undercarriage
      • Lifetime lubricated track rollers (6) and idlers
        • Carrier rollers
          • Tracks, 41 sections - XL configuration 406 mm (16") LGP configuration 635 mm (25")
            • Hydraulic track adjusters
                •  C-Frame, VPAT, hydraulic cylinders and lines
                •  Fuel tank
                •  Heavy duty crankcase guard
                •  Lockable engine enclosures
                •  Idler guards
                •  Radiator guard and grill
                •  Front pull device
                •  Rigid drawbar
                •  S·O·SSM ports (engine, power train and hydraulics)
              • C-Frame, VPAT, hydraulic cylinders and lines
                • Fuel tank
                  • Heavy duty crankcase guard
                    • Lockable engine enclosures
                      • Idler guards
                        • Radiator guard and grill
                          • Front pull device
                            • Rigid drawbar
                              • S·O·SSM ports (engine, power train and hydraulics)
                                • ANTIFREEZE
                                  •  Extended life coolant, -37° C (-35° F)
                                • Extended life coolant, -37° C (-35° F)
                                  • ELECTRICAL
                                    •  Integrated two front halogen lights, one rear halogen light
                                    •  Integrated four front halogen lights, two rear halogen lights
                                  • POWER TRAIN
                                    •  Drive auxiliary
                                    •  Installation, winch
                                  • UNDERCARRIAGE
                                    •  TRACK PAIRS, XL Track, 406 mm (16") MS SystemOne™ Track, 356 mm (14") TG SALT
                                    •  TRACK PAIRS, LGP Track, 635 mm (25") MS SystemOne™ Track, 635 mm (25") Self cleaning SALT Track, 635 mm (25") Self cleaning SystemOne™
                                  • OPERATOR ENVIRONMENT
                                    •  Cab
                                    •  Cab, polycarbonate windows, 360 degree guarding protection
                                    •  Seat, cloth, air suspension, heated
                                    •  Radio, AM/FM, CD player
                                  • Cab
                                    • Cab, polycarbonate windows, 360 degree guarding protection
                                      • Seat, cloth, air suspension, heated
                                        • Radio, AM/FM, CD player
                                          • HYDRAULICS
                                            •  Hydraulics, 4 valve for use with ripper
                                            •  Hydraulics, 4 valve for use with winch
                                          • Hydraulics, 4 valve for use with ripper
                                            • Hydraulics, 4 valve for use with winch
                                              • GUARDS
                                                •  Guard, rear, heavy duty
                                                •  Grill, radiator, heavy duty
                                                •  Guard, track guiding, center
                                                •  Guard, track guiding, full length
                                                •  Screen, rear, cab
                                                •  Screen, side, cab
                                                •  Screen, rear, canopy
                                                •  Screen, front and sides, canopy
                                                •  Sweeps, front
                                                •  Sweeps, rear
                                              • BLADES
                                                •  VPAT XL blade
                                                •  VPAT LGP blade
                                                •  VPAT Intermediate blade
                                              • REAR ATTACHMENTS
                                                •  Drawbar, towing
                                                •  Mounting, winch
                                                •  Ripper, parallelogram, includes three shanks and teeth
                                              • REAR ATTACHMENT CONTROL
                                                •  Control, ripper
                                                •  Control, winch
                                                •  Control, ripper and winch
                                              • MACHINE CONTROL AND GUIDANCE
                                                •  Installation, AccuGrade ready
                                              • Installation, AccuGrade ready
                                                • STARTING AIDS
                                                  •  Heater, engine, coolant, 120V
                                                • OTHER ATTACHMENTS
                                                  •  Enclosure, sound suppression
                                                  •  Machine Security System
                                                  •  Caterpillar Product Link 321
                                                  •  Caterpillar Product Link 121
                                                • ANTIFREEZE
                                                  •  Coolant, ext. life, -50° C (-58° F)
                                                • Coolant, ext. life, -50° C (-58° F)
                                                  • FIELD INSTALLED ATTACHMENT
                                                    •  Winch, hydrostatic
                                                  • Winch, hydrostatic

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