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The Caterpillar electronic 3126B DITAAC engine meets worldwide exhaust emission requirements for EPA Tier 2, EU Stage II, and Japan MOC Stage 2 engine exhaust emission regulations and offers excellent performance levels.

Drive Train

Rugged, durable and reliable components deliver smooth, responsive power and lasting reliability. The Auto-shift and Auto-kickdown features enhance operator productivity.

Differential Steering

A D6N equipped with Differential Steering maintains power to both tracks while turning. Operators have control of machine speed, direction and steering with the tiller bar controller, while maximizing production.

Operator Station

State-of-the-art operator station has reduced sound levels, low cab vibrations and excellent visibility. The (optional) Caterpillar comfort series air suspension seat helps reduce operator fatigue. Cab and air conditioning are standard.

AccuGrade® Laser and GPS Machine Control Guidance Systems

Advanced Laser and GPS technology improves operator accuracy, increases production and lowers operating costs.


Engineered and built to give solid support in the most demanding applications. Designed to last throughout the extended service life of the D6N.


The Caterpillar elevated sprocket undercarriage arrangements are designed for optimized balance and performance in fine grading to heavy dozing applications. Rugged design and proven structural manufacturing assure outstanding durability.

Work Tools

Cat Work Tools and Ground Engaging Tools (G.E.T.) are designed to provide strength and flexibility to match the machine to the job, maximizing performance.


Modular design moves Caterpillar a generation ahead in simplifying service and maintenance.

Total Customer Support

Your Cat Dealer offers a wide range of services that can be set up with a Customer Support Agreement. The dealer can customize a plan for you, from PM service to total machine maintenance, allowing you to optimize your return on investment.

D6N Standard Equipment

  • 10-amp/12-volt converter
  • 70-amp alternator
  • Back-up alarm
  • Diagnostic connector
  • Horn
  • Hour meter
  • Integrated front lights
  • Odometer

  • Coat hook
  • Cup holder
  • Electronic Monitoring System (EMS III)
  • Engine air cleaner service indicator in the cab
  • Engine RPM display/speed range display
  • Foot pegs for slope work
  • Four gauge cluster
  • FTC control for Clutch and Brake steering or Cat tiller bar for D/S
  • Hydraulic Pilot Control
  • Mirror, rearview
  • Power points, two 12-volt
  • Pre-start coolant level monitoring system
  • Product Link ready
  • Radio ready, 12-volt
  • ROPS/FOPS cab with integrated A/C
  • Seat belt, retractable 76 mm (3 in)
  • Storage and literature compartments
  • Transmission shift points selection function on dash

  • 3126B HEUI Caterpillar diesel engine with 24-volt starter
  • Air-to-air aftercooler
  • Auto-dust ejector with under hood air filter and pre-cleaner
  • Automatic down-shift and kickdown transmission control
  • Controlled throttle shifting
  • Coolant, extended life
  • Coolant sampling port
  • Decelerating function
  • Fan, blower
  • Fuel/water separator
  • High efficiency Aluminum Cooling Package.
  • Load compensated shifting
  • Planetary transmission with torque converter
  • Selectable shift points
  • Single poly-vee belt with automatic belt tensioner
  • Steering system: Clutch and Brake with FTC or optional Differential Steering system
  • Multi Velocity Program (MVP)

  • Adjuster, hydraulic track
  • Carrier rollers
  • Guards, end track guiding
  • Heavy-duty sealed and lubricated tracks
  • Idlers, lifetime lubricated
  • Rollers, lifetime lubricated track
  • Wider tread and taller flange idler profile

  • 4600 meter altitude operation capability without derating
  • Centralized remote mounted pressure taps for easy access
  • Crankcase guard
  • Ecology drains
  • Extended service intervals (500 hours)
  • Front pull device
  • Hinged engine doors
  • Hinged radiator grill
  • Implement oil filter
  • Keyed lockable enclosures
  • Load sensing hydraulics
  • Rigid drawbar
  • S•O•SSM taps for engine, transmission and implement fluids
  • Three valve hydraulics for VPAT dozer
  • Transmission remote pressure taps

D6N Optional Equipment

AccuGrade ARO (Laser/GPS)

Air conditioner less off

Alternator, brushless

Bulldozers-See Bulldozer Specifications Chart for Weights


Heater, dash mounted for OROPS

Fan, electronic Demand

Fan, reversible

Fast fill fuel tank

Lighting system, 4 lights

Rotating beacon

Sound suppression (for cab)

Product Link

Machine Security System (MSS)

  • Crankcase, heavy duty
  • Fuel tank (for cab or canopy)
  • Guard, rear, heavy duty
  • Guiding Track XL/MS
  • Guiding Track LGP/MS
  • Guiding Guarding Track XL/HD
  • Guiding Guarding Track LGP/HD
  • Radiator, heavy duty, hinged grill
  • Sand blast grid

Screens and Sweeps:
  • Rear screen for EROPS cab
  • Rear screen for OROPS canopy
  • Sun Screen
  • Sweeps EROPS
  • Sweeps OROPS

Hydraulics and Ripper:
  • Four valve for either SU blade (XL) and ripper or VPAT blade and ripper
  • Ripper, parallelogram (with three straight teeth)
  • Each optional curved tooth, replacing straight tooth

  • Air suspended C500 comfort series, cloth (for cab only)
  • C500 comfort series, cloth, mechanical suspended (for cab only)
  • C500 comfort series, vinyl, mechanical suspended
  • C500 heated cushion kit (dealer installed)
  • Low back, vinyl

Starting aids:
  • Engine coolant heater (dealer installed)
  • Electric fuel priming pump
  • Ether starting aid, automatic electronic control
  • Heavy-duty batteries

Track pair; heavy-duty sealed and lubricated:
  • XL arrangement, 40-sections:
  • LGP arrangement, 46-sections:

SystemOne Undercarriage:
  • XL
  • LGP

Track, pair, SystemOne:
  • XL arrangement, 40-sections:
  • LGP arrangement, 46-sections:

Winch and fairleads:
  • Winch (standard or low speed)
  • Fairlead, 3 rollers
  • Fairlead, 4 rollers