• 39,441 lbs Operating Weight
  • 168 @2200 rpm Horsepower
  • 4.5 yd³ Blade Capacity


Introducing the Next Generation of Machine Control

Intelligent Machine Control machines have the following advantages over dozers with external grade control systems.

  • Innovative
    Automated operation from rough dozing to finish grade.
  • Intelligent
    New dozing mode, load control performance features.
  • Integrated
    Standard factory installed integrated system.
  • No Cables
    No coiled cables between machine and blade.
  • No Climbing
    GNSS antenna and mast removed from blade.
  • No Connections
    No daily connections required between machine and blade.


Automated Blade Control, from Rough Dozing to Finish Grade. Straight to Grade.

  1. Blade moves to target surface until load reaches a preset level.
  2. The blade automatically raises to minimize track slip.
  3. Should the load decrease, blade will lower to re-load blade to an optimum level.


Cab Top GNSS Antenna

No blade mounted GNSS antenna(s), cables to worry about damaging with cab top GNSS antenna. Reduced risk of theft due to low visibility as viewed from ground level.

HST Technology

The D61i-23 incorporates new proprietary engine and hydrostatic transmission pump control technology to improve operational efficiency and reduce fuel consumption to levels lower than a conventional HST control system can obtain. This Komatsu exclusive feature reduces fuel consumption by up to 10% in P mode in demanding working conditions and up to 20% in E mode under lighter load conditions as compared to the prior model.

Powerful turns under various work conditions are achieved with the HST transmission, even under load. Counter-rotation is available for minimum turning radius, providing excellent maneuverability in tight spots.

Hydraulically-Driven Swing-up Fan

The D61i-23 utilizes a swing-up fan with a gas strut-assisted lift locking system to provide easy access to the (side-by-side) radiator, oil cooler, and charge air cooler. The swing-up feature makes it easier to access cooling cores. The hydraulic fan has a “cleaning” mode. The fan rotates in the reverse direction and helps to clear off objects in front of the cooling areas.

KDPF Regeneration Notification

The LCD color monitor panel provides the operator with the status of the KDPF regeneration without interfering with daily operation. When the machine initiates active regeneration, an icon will notify the operator.

Modular Design

One of the design goals behind the creation of the D61i-23 was to manufacture a more durable machine. This was achieved by reducing component complexity and using a strong modular design for increased serviceability and durability. Steel castings reduce the number of welds, improving C-frame rigidity and strength.

Parallel Link Undercarriage System PLUS

Komatsu's new Parallel Link Undercarriage System (PLUS) provides less downtime plus longer wear life with up to 40% lower undercarriage maintenance costs. Rotating bushings eliminate the cost and downtime for bushing turns, and strengthened rollers and links increase wear life up to two times. With PLUS, individual links can be replaced with common track tools.

Power Angle Tilt (PAT) Dozer With Adjustable Pitch

A Power Angle Tilt dozer blade with highly durable boxstructure frame is available for the EX and PX machines. The hydraulic blade tilt and angling functions and manually adjustable blade pitch expand versatility and productivity in a variety of applications. This PAT dozer assembly is tested to stringent test standards.

Selectable Working Mode

Working mode E is for general dozing applications with adequate speed and power while reducing fuel consumption and CO2. Working mode P is aimed at powerful operation and maximum production. The working mode is easily switched on the monitor panel, depending on the work at hand.

■ E mode (Economy mode)
With E mode, the engine outputs enough power for most general dozing applications without delivering unnecessary power. This mode allows for energy-saving operation and is suitable for work on ground where the machine may experience shoe slip or applications not requiring large power such as downhill dozing, leveling and light-load work.

■ P mode (Power mode)
With P mode, the engine outputs its full power, allowing the machine to perform large production, heavy-load, or uphill work.

Single Pedal (Decelerator/Brake Pedal) to be operated for Speed Control, during Operation

Machine operation becomes simple because brake function has been integrated into decelerator pedal. Machine moving speed including/excluding engine speed can be controllable by using only one pedal of decelerator/brake pedal. Operation of pedal function can be changed by the mode selector switch.

Decelerator mode
The pedal can decelerate engine RPMS and vehicle travel speed. Normally can be used for all applications.

Brake mode
The pedal can decelerate vehicle travel speed, keeping high engine revolution. This mode can be helpful to keep work equipment controllability and/or force, even during braking.

Stroke Sensing Hydraulic Cylinders

Robust stroke sensing hydraulic cylinders employ proven Komatsu sensor technologies for accurate finish grade performance. Stroke sensing angle cylinder allows machine control system to know the angle of the blade.

Variable and Customizable Quickshift Modes

The D61i-23 offers two gearshift modes: Variable and the new Customizable Quick shift. Variable shift mode provides 20 incremental speed settings for the operator, while the Customizable Quick shift provides 3 speed settings; all can be adjusted in the monitor to obtain the right speed for different operator preferences.



Model Komatsu SAA6D107E-2*
Type 4-cycle, water-cooled, direct injection
Aspiration Komatsu variable geometry Turbocharged, air-to-air aftercooled
Number of cylinders 6
Bore x stroke 4.21" x 4.88" 107 mm x 124 mm
Piston displacement 408 in³ 6.69 ltr
Governor All-speed and mid-range, electronic
SAE J1995 - Gross 170 HP 127 kW
(ISO 14396 169 HP 126 kW
ISO 9249 / SAE J1349 - Net 168 HP 125 kW
Rated rpm 2200 rpm
Fan drive type Hydraulic
Lubrication system:
Method Gear pump, force lubricationn
Filter Full-flow

Final Drive

In-shoe mounted axial piston type travel motors with integrated two-stage planetary gear reduction. Compact in-shoe mount reduces risk of damaged by debris. Bolt-on sprocket teeth for easy displacement.

Hydraulic System

Closed-center Load Sensing System (CLSS) designed for precise and responsive control, and for efficient simultaneous operation.

Hydraulic control unit:
All spool control valves externally mounted remote to the hydraulic tank. Piston-type hydraulic pump with capacity (discharge flow) of 171 ltr/min / 45 U.S. gal/min at rated engine rpm.

Relief valve setting 3,974 psi 280 kg/cm²
Hydraulic cylinders 3,974
Hydraulic cylinders: Number of cylinders Bore
Blade lift 2 4"
100 mm
Blade tilt 1 5"
120 mm
Blade angle 2 4"
110 mm
Hydraulic oil capacity (refilling):
Power angle tilt dozer 26.7 U.S. gal 101 ltr
Control valves:
3-spool control valve for Power Angle Tilt dozer
Blade lift Raise, hold, lower, and float
Blade tilt Right, hold, and left
Blade angle Right, hold, and left
Additional control valve required for ripper
Ripper lift Raise, hold, and lower

Hydrostatic Transmission

Dual-path, hydrostatic transmission provides infinite speed changes up to 9.0 km/h 5.6 mph. The variable capacity travel motors allow the operator to select the optimum speed to match specific jobs. Travel control lock lever and neutral switch.

Travel speed (quick shift mode)*ForwardReverse
1st0-3.4 km/h 0-2.1 mph0-4.1 km/h 0-2.5 mph
2nd0-5.6 km/h 0-3.5 mph0-6.5 km/h 0-4.0 mph
3rd0-9.0 km/h 0-5.6 mph0-9.0 km/h 0-5.6 mph
Travel speed (variable mode)0-9.0 km/h 0-5.6 mph0-9.0 km/h 0-5.6 mph
*Quick shift speeds are adjustable in the monitor.

Operating Weight APROXIMATE

Tractor weight: Including ROPS cab, U frame for power angle tilt dozer, rated capacity of lubricant, coolant, full fuel tank, operator, and standard equipment.
D61EXi-23 39,264 lb 17810 kg
Operating weight: Including Power Angle Tilt dozer, ROPS cab, operator, standard equipment, rated capacity of lubricant, hydraulic control unit, coolant, and full fuel tank.
D61EXi-23 39,441 lb 17890 kg

Service Refill Capacities

Coolant11.9 U.S. gal45 ltr
Fuel tank98.3 U.S. gal372 ltr
Engine oil7.2 U.S. gal27 ltr
Hydraulic tank26.7 U.S. gal101 ltr
Final drive (each side)2.2 U.S. gal8.1 ltr

Steering System

Palm Command Control System (PCCS) joystick control for all directional movements. Pushing the joystick forward results in forward machine travel, while pulling it rearward reverses the machine. Simply tilt the joystick to the left or right to make a turn. Tilting the joystick fully to the left or right activates counter-rotation.
Hydrostatic Transmission (HST) provides smooth powerful turns. Fully electronic control enables smooth control that can be adjusted in the monitor. The PCCS utilizes shift buttons to increase and decrease speed.

Minimum turning radius (as measured by track marks on the ground at pivot turn.) 83" 2.1 m


SuspensionOscillating-type with equalizer bar and pivot shafts
Track roller frameMonocoque, large section, durable construction
Rollers and idlersLubricated track rollers
Lubricated tracksParallel Link Undercarriage System (PLUS) with lubricated rotating bushings for extended system wear life and lower maintenance costs.Track tension is easily adjusted with grease gun.
Number of track rollers (each side)8
Type of shoes (standard)Single grouser
Number of shoes (each side)46
Grouser height2.3"57.5 mm
Shoe width (standard)34"860 mm
Ground contact area8,451 in²54520 cm²
Ground pressure
(with dozer, ROPS canopy):
4.87 psi33.6 kPa
0.34 kgf/cm²
Track gauge7'0"2130 mm
Length of track on ground10'5"3161 mm


  • 3D GNSS intelligent Machine Control
  • Air cleaner, double element with dust indicator
  • Alternator, 90 ampere/24V
  • Backup alarm
  • Batteries, 200 Ah/2 x 12V
  • Battery disconnect switch
  • Blade lift cylinders
  • Color monitor, LCD
  • Decelerator pedal (single pedal)
  • Engine hood
  • Engine intake centrifugal precleaner
  • Engine, swing open side cover
  • Engine shutdown secondary switch
  • Front pull hook
  • High mount foot rests
  • Horn, warning
  • Hydraulic driven radiator cooling fan with reverse clean mode
  • Hydraulics for rear equipment
  • KOMTRAX® Level 4
  • Komatsu Diesel Particulate Filter (KDPF)
  • Komatsu Variable Geometry Turbocharger (KVGT)
  • Locks, filler caps and covers
  • Muffler with curved exhaust pipe
  • Radiator mask, heavy-duty, swing up
  • Radiator reserve tank
  • ROPS cab**
  • Air conditioner
  • Cab accessories
    --12V power supply (2 ports) 

    --Cup holder

    Rearview mirror
    Rear view monitoring (1 camera) 
    --AM/FM Radio w/remote AUX plug (3.5 mm)

    --76 dBA
  • Work lights
    --3 front, cab mounted

    2 rear, cab mounted
  • Seat, air suspension, fabric, heated low back, headrest
  • Seat belt, 76 mm / 3", retractable
  • Seat belt indicator
  • Sealed electrical connectors
  • Side by side rear mounted cooling package
  • Starting motor, 5.5 kW/24V
  • Steering system, hydrostatic
  • Track roller guards, center and end sections
  • Track shoe assembly
  • Heavy-Duty lubricated rotary bushing (PLUS) track
  • 600 mm / 24" single grouser shoe (EX)
  • 860 mm / 34" single grouser shoe (PX)
  • Transmission with Variable and Customizable Quickshift
  • Transmission, hydrostatic
  • Underguards, heavy duty
  • Engine
  • Transmission
  • Water separator

* Dozer assembly and rear mounted equipment are not included in base machine standard equipment
** Cab meets ROPS and FOPS Level 2 standards


  • Dozer assembly
  • Drawbar, long type
  • Track roller guard, full length

Multi-shank ripper (for D61EXi/PXi):

  • Weight
    1757 kg / 3,874 lb
  • Beam length
    2170 mm / 7'1"
  • Maximum lift above ground
    560 mm / 1'10"
  • Maximum digging depth
    665 mm / 2'2"