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Small dozer

D39EX-24

  • Horsepower 78 kW @ 2 200 rpm 105 HP @ 2,200 rpm
  • Operating weight 9 930 kg 21,891 lbs.
  • Blade capacity 2.21 m³ 2.89 yd³

Comfort and performance in one

Perform accurate fine dozing with exceptional blade visibility while sitting in a cab designed for comfort. Excellent maneuverability and full power to both tracks during turns make the D39EX-24 an ideal choice for grading or earth moving applications.

  • Nimble size with quick response
  • High blade visibility
  • Quick steering and balance

Features and benefits

Parallel Link Undercarriage System (PLUS)

Designed to wear evenly so the machine provides close to 100% usage of undercarriage components, Komatsu PLUS undercarriage lowers undercarriage maintenance costs by up to 40% over a conventional undercarriage. Strengthened rollers and links increase wear life up to two times.

PAT dozer with adjustable pitch

Expand your productivity and gain more versatility in a variety of applications with a power angle tilt (PAT) dozer blade with adjustable blade pitch system.

Exceptional blade visibility

An innovative super-slant nose design provides excellent blade visibility for improved machine control and increased efficiency and productivity.

HST with electronic control

Fully electronic control provides complete automatic shifting and enables smooth control. Equipped with Komatsu-designed HST, this machine allows for Quick-Shift or variable speed selection.

Easy-access maintenance features

A swing-up fan with a gas strut-assisted lift system provides easy access to the radiator, oil cooler and charge air cooler. The hydraulic fan has a reversing fan for cleaning any objects that are restricting air flow.

Palm command control system lever

Designed for your operator’s comfort and ease of use, the ergonomic, low-effort palm command control system (PCCS) joystick controls all directional movements, including machine travel speed, as well as counter-rotation.

Specifications for D39EX-24

Close all Expand all
US system Metric
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 95 x 115 mm
Piston displacement 3.26 L
Governor All-speed, electronic
Horsepower:  
SAE J1995 - Gross 79 kW
ISO 9249 / SAE J1349 - Net 78 kW
Rated rpm 2 200 rpm
Fan drive type Hydraulic
Lubrication system:  
Method Gear pump, force lubrication
Filter Full-flow
*EPA Tier 4 Final emissions certified  
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 in
Piston displacement 199 in³
Governor All-speed, electronic
Horsepower:  
SAE J1995 - Gross 107 HP
ISO 9249 / SAE J1349 - Net 105 HP
Rated rpm 2,200 rpm
Fan drive type Hydraulic
Lubrication system:  
Method Gear pump, force lubrication
Filter Full-flow
*EPA Tier 4 Final emissions certified  
Hydrostatic transmission

Dual-path, hydrostatic transmission provides infinite speed changes up to 8.5 km/h. 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 kph 0–4.1 kph
2nd 0–5.6 kph 0–6.5 kph
3rd 0–8.5 kph 0–8.5 kph
Travel speed
(variable mode)
0–8.5 kph 0–8.5 kph

*Quick shift speeds are adjustable in the monitor.

Dual-path, hydrostatic transmission provides infinite speed changes up to 5.3 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 0–2.1 mph 0–2.5 mph
2nd 0–3.5 mph 0–4.0 mph
3rd 0–5.3 mph 0–5.3 mph
Travel speed
(variable mode)
0–5.3 mph 0–5.3 mph

*Quick shift speeds are adjustable in the monitor.

Final drive

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.

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 back 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* 2.2 m

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

Palm Command Control System (PCCS) joystick control for all directional movements. Pushing the joystick forward results in forward machine travel, while pulling it back 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* 87 in

*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 47 mm
Shoe width (standard) 510 mm
Ground contact area 23 919 cm²
Ground pressure
(with dozer, ROPS cab)
36.1 kPa / 0.73 kgf/cm²
Track gauge 1 620 mm
Length of track on ground 2 345 mm
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 in
Shoe width (standard) 20 in
Ground contact area 3,708 in²
Ground pressure
(with dozer, ROPS cab)
5.24 psi
Track gauge 5 ft. 4 in
Length of track on ground 7 ft. 8 in
Service refill capacities
Coolant 34 L
Fuel tank 190 L
Engine oil 11 L
Hydraulic tank 64 L
Final drive (each side) 3.5 L
Diesel Exhaust Fluid (DEF) tank 10 L
Coolant 9.0 US gal
Fuel tank 50.2 US gal
Engine oil 2.9 US gal
Hydraulic tank 17 US gal
Final drive (each side) 0.9 US gal
Diesel Exhaust Fluid (DEF) tank 2.6 US gal
Operating weight (approximate)
Tractor weight:
Including ROPS cab, U frame for power angle
tilt dozer, rated capacity of lubricant, coolant,
full fuel tank, operator, and standard equipment.
8 790 kg
Operating weight:
Operating weight: Including power angle tilt dozer,
ROPS cab, operator, standard equipment, rated
capacity of lubricant, coolant, and full fuel tank.
9 930 kg
Tractor weight:
Including ROPS cab, U frame for power angle
tilt dozer, rated capacity of lubricant, coolant,
full fuel tank, operator, and standard equipment.
19,379 lbs.
Operating weight:
Operating weight: Including power angle tilt dozer,
ROPS cab, operator, standard equipment, rated
capacity of lubricant, coolant, and full fuel tank.
21,891 lbs.
  • 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
  • Auto idle shutdown
  • Back-up alarm
  • Batteries, large capacity 24 V/92 Ah
  • Battery disconnect switch
  • Cab accessories 
    --12 V × 2 power supply
    --Cup holder
    --Rear view mirror
    --Rear view monitor system
  • Crankcase guard and underguard
  • Decelerator/brake pedal (Single pedal)
  • Electronically controlled Hydrostatic Transmission (HST) with quick-shift and variable speed settings
  • Electronic high resolution LCD color monitor panel with on-board diagnostics
  • Engine hood and side panels
  • Engine, KOMATSU SAA4D95LE-7, NET output of 80 kW, direct injection, water-cooled turbocharged, air-to-air aftercooler, cooled EGR, EPA Tier 4 Final and EU Stage 4 emissions certified
  • Engine shutdown secondary switch
  • Fan, hydraulic driven, electronic control
  • Filler cap locks and cover locks
  • Foot rest, high mounted
  • Grease gun holder
  • High altitude arrangement (No fuel adjustment up to 2300 m)
  • Horn
  • Hydraulics for PAT dozer
  • Intake pipe with precleaner
  • Komatsu Diesel Oxidation Catalyst (KDOC)
  • Komtrax® Level 5
  • 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
  • Seat belt, 76 mm retractable
  • Seat belt indicator
  • Seat, air suspension, fabric, heated, low back, headrest
  • Sealed electical connections
  • Shovel holder
  • Starting motor, 24 V/4.5 kW
  • Selective Catalytic Reduction (SCR)
  • Self adjusting idler
  • Sprockets, bolt-on
  • Sprocket inner guard
  • Steering System, hydrostatic
  • Track roller guards, end section
  • Track shoe assembly (PLUS)
  • Sealed and lubricated
  • D39EX-24: 510 mm single grouser shoe
  • Triple labyrinth final drive
  • Underguards, heavy duty
  • Engine
  • Transmission
  • Water separator
  • Wide core cooling package
  • Worklamp (Front 3, rear 2)

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

** Cab meets OSHA/MSHA ROPS and FOPS Level 2 standards (ROPS standards ISO 3471, SAE J/ISO 3471; FOPS standards ISO 3449)

  • 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
  • Auto idle shutdown
  • Back-up alarm
  • Batteries, large capacity 24 V/92 Ah
  • Battery disconnect switch
  • Cab accessories 
    --12 V × 2 power supply
    --Cup holder
    --Rear view mirror
    --Rear view monitor system
  • Crankcase guard and underguard
  • Decelerator/brake pedal (Single pedal)
  • Electronically controlled Hydrostatic Transmission (HST) with quick-shift and variable speed settings
  • Electronic high resolution LCD color monitor panel with on-board diagnostics
  • Engine hood and side panels
  • Engine, KOMATSU SAA4D95LE-7, NET output of 107 HP, direct injection, water-cooled turbocharged, air-to-air aftercooler, cooled EGR, EPA Tier 4 Final and EU Stage 4 emissions certified
  • Engine shutdown secondary switch
  • Fan, hydraulic driven, electronic control
  • Filler cap locks and cover locks
  • Foot rest, high mounted
  • Grease gun holder
  • High altitude arrangement (No fuel adjustment up to 2300 m)
  • Horn
  • Hydraulics for PAT dozer
  • Intake pipe with precleaner
  • Komatsu Diesel Oxidation Catalyst (KDOC)
  • Komtrax® Level 5
  • 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
  • Seat belt, 3" retractable
  • Seat belt indicator
  • Seat, air suspension, fabric, heated, low back, headrest
  • Sealed electical connections
  • Shovel holder
  • Starting motor, 24 V/4.5 kW
  • Selective Catalytic Reduction (SCR)
  • Self adjusting idler
  • Sprockets, bolt-on
  • Sprocket inner guard
  • Steering System, hydrostatic
  • Track roller guards, end section
  • Track shoe assembly (PLUS)
  • Sealed and lubricated
  • D39EX-24: 20" single grouser shoe
  • Triple labyrinth final drive
  • Underguards, heavy duty
  • Engine
  • Transmission
  • Water separator
  • Wide core cooling package
  • Worklamp (Front 3, rear 2)

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

** Cab meets OSHA/MSHA ROPS and FOPS Level 2 standards (ROPS standards ISO 3471, SAE J/ISO 3471; FOPS standards ISO 3449)

  • Dozer assembly
  • Hitch
  • Hydraulics for rear equipment
  • Track roller guard, full length

Multi-shank ripper (for D39EX only)

  • Weight: 470 kg
  • Beam length: 1569 mm
  • Maximum lift above ground: 389 mm
  • Maximum digging depth: 336 mm
  • Number of shanks: 3
  • Dozer assembly
  • Hitch
  • Hydraulics for rear equipment
  • Track roller guard, full length

Multi-shank ripper (for D39EX only)

  • Weight: 1,036 lb
  • Beam length: 62"
  • Maximum lift above ground: 15"
  • Maximum digging depth: 13"
  • Number of shanks: 3
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Technology that works as hard as you do

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Komtrax for construction equipment is Komatsu’s state of the art remote monitoring system, helping you keep track of where your machines are and how much they are working. The system seamlessly gathers important data that can help you coach operators to improve efficiencies and productivity.

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