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Komatsu Dozers D39EX-23

Komatsu Dozers D39EX-23
D39EX-23 Crawler Dozer
Need a great grading tractor with plenty of power and a cab your operators will fight over. You've found it with the D39EX-23. The super slant nose moves the coolers and hydraulic fan to the rear, the operator more forward and the result is a new way of balancing a dozer to make it an incredibly easy tractor to finish grade with. Add a more efficient, fully hydrostatic drivetrain for precise maneuverability and control, two working modes for more efficient work matching and fuel savings and fuel efficient Tier 4 interim engine technology and you have everything you want and need in a small dozer. Put your grade control system on it and you have a high speed yet very precise fine grading system.

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
0–3.4 km/h
0–2.5 mph
0–4.1 km/h
2nd 0–3.5 mph
0–5.6 km/h
0–4.0 mph
0–6.5 km/h
3rd 0–5.3 mph
0–8.5 km/h
0–5.3 mph
0–8.5 km/h
Travel speed (variable mode) Forward Reverse
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.
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 (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.
ROPS cab 18,210 lb 8860 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 (refilling):
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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