Komatsu Dozers D39PX-23
D39PX-23 Crawler Dozer
Fine grading. It requires a stable platform, precise and responsive hydraulics and easy to operate operator controls. The D39PX-23 scores top marks in all of those categories. The super slant nose design moves the coolers and hydraulic fan to the rear and the operator forward to create a balance that makes fine grading a snap. With its wide track, the D39PX-23 has a big, stable platform to work the blade off of, essential for fine grading. A fully hydrostatic drivetrain gives the operator incredibly quick and precise maneuverability. And new Power and Economy working modes allow the operator to adjust his machine's performance to his current job and save on fuel consumption as he's doing it. Like all Komatsu products, the D39PX-23 has the advanced hydraulics system to make the addition of a grade control system seamless and turn it from a great grading tractor to an incredibly precise and fast fine grading system.
| 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 |
| 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 |
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| *Quick shift speeds are adjustable in the monitor. | ||
| 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. |
| 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. |
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| Minimum turning radius* | 94" | 2.4 m |
| *As measured by track marks on the ground at pivot turn. | ||
| 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) | 25" | 635 mm |
| Ground contact area | 4,616 in² | 29782 cm² |
| Ground pressure (with dozer, ROPS cab) |
4.70 psi | 0.33 kgf/cm² / 31.7 kPa |
| Track gauge | 5'11" | 1810 |
| Length of track on ground | 7'8" | 2345 mm |
| 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 |
| 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 | 18,982 lb | 8610 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 | 21,675 lb | 9830 kg |
| 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. |
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| 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 | 3.5" | 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 | |
