Komatsu D39EX-23

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Features

New Power and Economy modes:
Full power when you need it and Economy mode to save fuel when you don't.

New engine and hydrostatic pump control technology improves operational efficiency and lowers fuel consumption.

SAA4D95LE-6 variable flow turbocharged and aftercooled 3.26 liter diesel engine provides excellent fuel economy. This engine is EPA Tier 4 Interim and EU Stage 3B emissions certified.

Variable Flow Turbocharger uses a simple valve to provide optimum air flow under all speed and load conditions.

Komatsu Diesel Oxidation Catalyst reduces particulate matter using passive regeneration 100% of the time. No active or manual regeneration is required.

Rear view monitoring system (standard)

Advanced diagnostic system continuously monitors machine operation and vital systems to identify machine issues and assist with troubleshooting.

Single pedal can act as either brake or Decelerator

Improved Cooling System
■ Electronically controlled hydraulically driven fan is manually reversible
■ Gas assisted lift cylinders on radiator cover opens for easy cleaning
■ Side-by-side coolers with increased cooling capacity

Integrated ROPS cab features:
■ Large, quiet, and pressurized cab
■ Excellent visibility with integrated ROPS structure
■ New heated air-ride seat with 15% higher capacity (standard)
■ Standard aux jack and (2) 12V power convertors

Improved durability
■ Heavy-plate steel used for nose and tanks
■ Dozer frame with full steel castings
■ Komatsu designed and manufactured components

Self-adjusting idler support provides constant and even idler tension, reducing vibration and increasing undercarriage life.

Power Angle Tilt (PAT) dozer with manually adjustable blade pitch increases productivity in a variety of applications.
■ Three mounting locations for grade control masts

Complete operator blade control
■ Palm Command Control System (PCCS)
■ Electronic Proportional Control (EPC)
■ Adjustable Quick shift and Variable shift modes
■ New blade angle switch
■ Normal and Fine blade controls
■ Multiple Operator memory storage

New more efficient HST with electronic control
■ Customizable Quick shift (3 speed) settings for the operator
■ Variable speed selection (20 speeds)
■ Low speed matching technology (larger displacement pumps/efficient engine speed)
■ Up to 20%* reduced fuel consumption in E mode and 10%* in P mode.

Large color monitor
■ Easy-to-read and use large 7" high-resolution multi-color monitor
■ ECO guidance
■ On-board diagnostics

Specifications

Engine    
Model   Komatsu SAA4D95LE-6*
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 (reversible)
Lubrication system:    
Method   Gear pump, force lubrication
Filter   Full-flow
*EPA Tier 4 Interim and EU stage 3B emissions 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 0–2.1 mph 0–2.5 mph
  0–3.4 km/h 0–4.1 km/h
2nd 0–3.5 mph 0–4.0 mph
  0–5.6 km/h 0–6.5 km/h
3rd 0–5.3 mph 0–5.3 mph
  0–8.5 km/h 0–8.5 km/h
Travel speed    
(variable mode) Forward Reverse
  0–5.3 mph 0–5.3 mph
  0–8.5 km/h 0–8.5 km/h
*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 damaged by debris. Bolt-on sprocket ring.    
     
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: 87" 2.2 m
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 2.1" 53 mm
Shoe width (standard) 20" 510
Ground contact area 3,708 in² 23919 cm²
Ground pressure    
(with dozer, ROPS cab) 5.60 psi 0.39 kgf/cm² / 37.8 kPa
Track gauge 5'4" 1620 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
     
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.    
ROPS cab 18,210 lb 8260 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.    
ROPS cab 20,749 lb 9410 kg
     
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 15.9 U.S. gal 60 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

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