• 22,774 lbs Operating Weight
  • 105 hp @ 2200 rpm Horsepower
  • 2.89 - 3.14 yd³ Blade Capacity

D39PXi-24

Powerful, versatile and yes, nimble If you want a dozer that’s equally at home performing heavy site prep and accurate fine work, this model is an excellent choice. Powered by a fuel efficient, environmentally friendly EPA Tier 4 Final certified engine, it offers your operators a quiet, comfortable cab that provides unrivaled blade visibility. It’s engineered to get jobs done quickly and accurately with its outstanding blade response, fast work equipment speed, an additional “fast-blade mode” that boosts blade speed for high-speed grading, and surprising maneuverability via full power to both tracks during turns or counter rotation steering.

  • Innovative
    Automated operation from rough dozing to finish grade.
  • Intelligent
    New dozing mode, load control performance features.
  • Designed for the machine:
    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.
  • Fully supported:
    Get assistance via Komatsu’s service and support network

Features

Learns as it works

With proactive dozing control, even your less experienced operators can automatically cut/strip from existing terrain. The dozer measures the terrain it tracks over and uses that data to plan the next pass. Can improve productivity by up to 60% versus previous generation.

Spreads fill material automatically

Lift layer control automatically lets your operators spread fill from existing terrain with the press of a button. The dozer measures the terrain it tracks over and uses the data it gathers to plan the next pass. Attain up to double your production and achieve consistent layers for compaction quality.

Levels material even during rough dozing

Tilt steering control automatically tilts the blade to maintain straight travel during rough dozing. Reduces operator steering input by up to 80%.

Quick surface creation

Operators can create a temporary design surface with the press of a button. Combined with other iMC 2.0 functions, your crew can begin stripping or spreading using automated input while waiting for the finish grade model.

Close the operator skill gap

Machine logic allows the dozer to continuously learn the terrain and make calculated decisions for the next pass. Intelligent Machine Control helps lessen the skill gap between new and experienced operators.

Advanced machine control

In select situations — auto stripping, rough dozing, spreading, advanced finish grading — operators can opt for nearly 100% machine control auto usage. They can even apply automatic control without having a 3D model.

A machine that learns from the operator

Automatic functions give the dozer the ability to learn from operator's blade input, resulting in more adaptability, easier operation and less reliance on operator input.

Outstanding blade response for finish grading

To deliver unparalleled grading performance, iMC enables the dozer to look ahead at grade transitions and alter the blade angle accordingly.

Features

Bucket angle hold control

Empower your operator with bucket angle hold control that automatically holds the bucket angle to the design surface during arm operation, allowing the operator to perform finish grading using only arm input.

Auto tilt bucket control

Auto tilt bucket control helps the operator align the bucket parallel with the slope so that finish grading can be accomplished without having to align the machine with the target surface.

Close the operator skill gap

Machine logic allows the dozer to continuously learn the terrain and make calculated decisions for the next pass. Intelligent Machine Control helps lessen the skill gap between new and experienced operators.

Advanced machine control

In select situations — auto stripping, rough dozing, spreading, advanced finish grading — operators can opt for nearly 100% machine control auto usage. They can even apply automatic control without having a 3D model.

A machine that learns from the operator

Automatic functions give the dozer the ability to learn from operator's blade input, resulting in more adaptability, easier operation and less reliance on operator input.

Outstanding blade response for finish grading

To deliver unparalleled grading performance, iMC enables the dozer to look ahead at grade transitions and alter the blade angle accordingly.

Specifications

Engine

Model Komatsu SAA4D95LE-7*
Type 4-cycle, water-cooled, direct injection
Aspiration Variable flow turbocharged, air-to-air aftercooled
Number of cylinders 4
Bore x stroke 3.75" x 4.52" 95 mm x 115 mm
Piston displacement 199 in³ 3.26 ltr
Governor All-speed, electronic
Horsepower:
SAE J1995 - Gross 107 HP 79 kW
ISO 9249 / SAE J1349 - Net 105 HP 78 kW
Rated rpm 2200 rpm
Fan drive type Hydraulic
Lubrication system:
Method Gear pump, force lubrication
Filter Full-flow
*EPA Tier 4 Final emission certified

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 99 ltr/min 26 U.S. gal/min at rated engine rpm.

Relief valve setting 3,974 psi 27.4 MPa / 280 kg/cm²
Hydraulic cylinders
Double-acting, piston type
Number of cylinders: Bore Bore
Blade lift / 2 3" 75 mm
Blade tilt / 1 3.6" 90 mm
Blade angle / 2 3.1" 80 mm
Blade pitch
1 adjustable linkage
Hydraulic oil capacity (refill):

Power angle tilt dozer 17 U.S. gal 64 ltr
Control valves:

3-spool control valve for Power Angle Tilt dozer

Positions:

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

Positions:

Ripper lift
Raise, hold and lower

Hydrostatic Transmission

Dual-path, hydrostatic transmission provides infinite speed changes up to 5.3 km/h / 8.5 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
1st0–2.1 mph
0–3.4 km/h
0–2.5 mph
0–4.1 km/h
2nd0–3.5 mph
0–5.6 km/h
0–4.0 mph
0–6.5 km/h
3rd0–5.3 mph
0–8.5 km/h
0–5.3 mph
0–8.5 km/h
Travel speed
(variable mode)
ForwardReverse
0–5.3 mph
0–8.5 km/h
0–5.3 mph
0–8.5 km/h
*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.
20,415 lb 9260 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.
22,774 lb 10330 kg

Service Refill Capacities

Coolant 9.0 U.S. gal 34 ltr
Fuel tank 50.2 U.S. gal 190 ltr
Engine oil 2.9 U.S. gal 11 ltr
Hydraulic tank 15.8 U.S. gal 60 ltr
Final drive (each side) 0.9 U.S. gal 3.5 ltr
Diesel Exhaust Fluid (DEF) 4.1 U.S. gal 15.4 ltr

Undercarriage

Suspension Rigid type
Track roller frame Monocoque, large section, durable construction
Rollers and idlers Lubricated track rollers
Sealed and lubricated track Track tension is easily adjusted with grease gun.
Number of track rollers (each side) 6
Type of shoes (standard) Single grouser
Number of shoes (each side) 39
Grouser height 1.9" 47 mm
Shoe width (standard) 25" 635 mm
Ground contact area 4,616 in² 29782 cm²
Ground pressure
(with dozer, ROPS cab)
5.0 psi 0.35 kgf/cm² / 34.3 kPa
Track gauge 5'11" 1810 mm
Length of track on ground 7'8" 2345 mm

Specifications

Engine

Model
Komatsu SAA4D95LE-7*
Type
4-cycle, water-cooled, direct injection
Aspiration
Variable flow turbocharged, air-to-air aftercooled
Number of cylinders
4
Bore x stroke 3.75" x 4.52" 95 mm x 115 mm
Piston displacement 199 in³ 3.26 ltr
Governor
All-speed, electronic
Horsepower:

SAE J1995 - Gross 107 HP 79 kW
ISO 9249 / SAE J1349 - Net 105 HP 78 kW
Rated rpm
2200 rpm
Fan drive type
Hydraulic
Lubrication system:

Method
Gear pump, force lubrication
Filter
Full-flow
*EPA Tier 4 Final emission certified

Hydrostatic Transmission

Dual-path, hydrostatic transmission provides infinite speed changes up to 5.3 km/h 8.5 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)*
Forward
Reverse
1st 0-3.4 km/h
0-2.1 mph
0-4.1 km/h
0-2.5 mph
2nd 0-5.6 km/h
0-3.5 mph
0-6.5 km/h
0-4.0 mph
Travel speed
(variable mode)
Forward
Reverse
  0-8.5 km/h
0-5.3 mph
0-8.5 km/h
0-5.3 mph

*Quick shift speeds are adjustable in the monitor.

Final Drives

In-shoe mounted, axial-piston-type travel motors, with integrated two-stage planetary gear reduction. Compact in-shoe mount reduces risk of damage by debris. Bolt-on sprocket ring with triple labyrinth seal design.

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*

  • D39EXi-24: 2.2 m 87"
  • D39PXi-24: 2.4 m 94"

*As measured by track marks on the ground at pivot turn.

Undercarriage

Suspension
Rigid type
Track roller frame
Monocoque, large section, durable construction
Rollers and idlers
Lubricated track rollers
Sealed and lubricated track
Track tension is easily adjusted with grease gun.
Number of track rollers (each side)
6
Type of shoes (standard)
Single grouser
Number of shoes (each side)
39
Grouser height 1.9" 47 mm
Shoe width (standard) 25" 635 mm
Ground contact area 4,616 in² 29782 cm²
Ground pressure
(with dozer, ROPS cab)
(ISO 16754)
4.39psi 0.31 kgf/cm² / 30.1 kPa
Track gauge 5'11" 1810 mm
Length of track on ground 7'8" 2345 mm

Service Refill Capacities

Coolant 9.0 U.S. gal 34 ltr
Fuel tank 50.2 U.S. gal 190 ltr
Engine oil 2.9 U.S. gal 11 ltr
Hydraulic tank 15.8 U.S. gal 60 ltr
Final drive (each side) 0.9 U.S. gal 3.5 ltr
Diesel Exhaust Fluid (DEF) 2.6 U.S. gal 10 ltr

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.

  • D39EXi-24: 8850 kg 19,510 lb
  • D39PXi-24: 9200 kg 20,282 lb

Operating weight:
Including Power Angle Tilt dozer, ROPS cab, operator, standard equipment, rated capacity of lubricant, hydraulic control unit, coolant, and full fuel tank.

  • D39EXi-24: 10010 kg 22,068 lb
  • D39PXi-24: 10410 kg 22,950 lb

Standard

  • Accumulator for Electric Proportional Control (EPC)
  • Air cleaner, dry, double element type with caution lamp on monitor
  • Air conditioner (A/C)
  • Air inlet
  • Alternator, 24 V/85 A
  • Back-up alarm
  • Batteries, large capacity 24 V/92 Ah
  • Cab accessories
    --12 V × 2 power supply

    --Cup holder

    --Rear view mirror

    --Rear view monitor system

    --Bluetooth/USB compatible radio with remote AUX plug (3.5 mm)
  • Crankcase guard and underguard
  • Decelerator/brake pedal (Single pedal)
  • Electronically controlled Hydrostatic Transmission (HST) with quick-shift and variable speed settings
  • Electronic monitor panel with on-board diagnostics
  • Engine hood and side panels
  • Engine, KOMATSU SAA4D95LE-7, gross output of 80 kW 107 HP, direct injection, water-cooled turbocharged, air-to-air aftercooler, cooled EGR, EPA Tier 4 Final and EU Stage 4 emissions certified
  • Fan, hydraulic driven, electronic control
  • Filler cap locks and cover locks
  • Foot rest, high mounted 
  • Fuel pre-filter (10 micron) and fuel filter (2 micron)
  • Grease gun holder
  • High altitude arrangement (No fuel adjustment up to 2300 m)
  • Horn
  • Hydraulics for PAT dozer
  • Intake pipe with precleaner
  • Large high-resolution LCD
  • Lunch box holder
  • Marks and plates, English
  • New Operator Identification System
  • Palm Command Control System (PCCS) with electronic control for travel control
  • Palm Command Control System (PCCS) with EPC for blade control
  • Power turn with counter rotation
  • Pullhook, front
  • Radiator guard grid
  • Radiator reserve tank
  • Real-time DEF monitoring
  • Rear-hinged radiator guard
  • Reverse travel speed presets
  • ROPS cab
    Meets ISO 3471, SAE J/ISO 3471 ROPS standards, and ISO 3449 FOPS standard.
  • Seat belt, 76 mm 3" retractable
  • Seat, air suspension, fabric, heated, low back, headrest
  • Starting motor, 24 V/4.5 kW
  • Self adjusting roller
  • Sprockets, bolt-on
  • Sprocket inner guard
  • Track roller guards, end section
  • Track shoe assembly (PLUS)
    —Heavy-Duty lubricated rotary bushing
    D39EXi-24: 510 mm 20" single grouser shoe
    D39PXi-24: 635 mm 25" single grouser shoe
  • Triple labyrinth final drive
  • Water separator

Dozer assembly and rear-mounted equipment are not included in base machine price.

Optional

  • Dozer assembly 
  • Hitch 
  • Hydraulics for rear equipment 
  • Track roller guard, full length
  • 700 mm 27.5" single grouser (PX)(PLUS)