The powerful and fuel-efficient Komatsu SAA4D107E-1 engine incorporated into the Komatsu D39 dozer makes it a logical choice for both grading and dozing operations. The dozer also benefits from its long track-on-ground feature, which improves machine stability and grading/dozing performance.
The Komatsu D39 features a hydrostatic transmission (HST) with quick-shift or variable speed selection, dual-path closed-circuits with two variable displacement piston pumps and two variable displacement travel motors, and variable displacement travel motors. The HST also has hydrostatic steering, which eliminates the need for steering clutches and brakes for smooth, powerful turns.
The cab mount incorporates a cab damper system that offers excellent shock and vibration absorption while isolating the cab from the machine body for a quiet, comfortable operating environment.
Blade control is provided by the PPC-controlled palm command joystick, which is combined with the highly reliable Komatsu hydraulic system for precise control. The CLSS hydraulic system provides excellent fine controllability, with blade lever stroke being directly proportional to blade speed regardless of load or travel speed. All directional movements, including machine travel speed and counter-rotation, are controlled by the low-effort PCCS joystick.
The Komatsu D39-22 dozer also has a heavy-duty undercarriage with large links, a larger bushing diameter, and wider sprocket teeth for longer undercarriage life. Travel motors and final drives are protected from rocks and stumps by being mounted within the track shoe width, which increases durability. The use of thicker box section material and fewer welded components in the monocoque track frame design increases rigidity and strength.
D39 Komatsu was built to last by reducing component complexity and employing a strong modular design for increased serviceability and reliability.
Komatsu D61 dozer is a powerful machine capable of handling any task. The D61 Komatsu dozer is an excellent option for those who need to move large amounts of dirt, sand, or rock. The Komatsu D61 dozer has a lot of power and can finish the job quickly and efficiently.
The Komatsu D61 bulldozer is well-known for its toughness and dependability. Komatsu dozer D61 was designed to withstand tough jobs and harsh environments. The bulldozer Komatsu D61 is also well-known for being simple to maintain when compared to other models in this category.
Komatsu D39 Specs
When we created the specs for the D39 Komatsu dozer, we looked at two models. These are D39EX-22 and D39PX-22 dozers. Let’s get right to the Komatsu D39 dozer specs so we don’t waste any more time.
Brand | Komatsu |
Model | D39EX-22 D39PX-22 |
Type | Crawler dozer |
Years Made | 2009-2016 |
Engine
Brand | Komatsu |
Model | SAA4D107E-1 |
Type | Diesel, water-cooled |
No. of Cylinders | 4 |
Emissions | Tier 3 / Stage 3A |
Aspiration | Turbocharged air-to-air aftercooled |
Combustion | Direct injection |
Governor | All-speed, electronic |
Rated Power | 2200 RPM |
Specs | US | Metric |
---|---|---|
Horsepower – Gross | 107 HP | 80 kW |
Horsepower – Net | 95 HP | 71 kW |
Displacement | 272 cu in. | 4457 cc |
Bore | 4.2 in. | 10.7 cm |
Stroke | 4.9 in. | 12.4 cm |
Weight
US | Metric | |
---|---|---|
Operating Weight – D61EX-23 | 19,930 lbs | 9.040 kg |
Operating Weight – D61PX-23 | 20,900 lbs | 9,480 kg |
Tractor Weight – D61EX-23 | 17,196 lbs | 7,800 kg |
Tractor Weight – D61PX-23 | 17,990 lbs | 8,160 kg |
Ground Pressure – D61EX-23 | 5.9 psi | 40.7 kPa |
Ground Pressure – D61PX-23 | 4.2 psi | 29.0 kPa |
Transmission
Transmission | Hydrostatic (HST) |
No of Gear | 3 forward 3 reverse |
Travel Speed
US | Metric | |
---|---|---|
Max. Travel Speed (3rd forward) | 5.3 mph | 8.5 km |
Max. Travel Speed (3rd reverse) | 5.3 mph | 8.5 km |
Variable Mode | 5.3 mph | 8.5 km |
Hydraulic System
Type | Closed-center load sensing system (CLSS) |
Pump | Piston-type hydraulic pump |
US | Metric | |
---|---|---|
Pump Flow | 26.2 GPM | 99 LPM |
System Relief Pressure | 3983 psi | 274 Bar |
Dimensions
US | Metric | |
---|---|---|
O/A Height | 112 in. | 284 cm |
O/A Lenght | 171 in. | 434 cm |
Width Over Track – D61EX-23 | 83 in. | 211 cm |
Width Over Track – D61PX-23 | 96 in. | 243 cm |
Turning Radius – D61EX-23 | 87 in. | 220 cm |
Turning Radius – D61PX-23 | 95 in. | 240 cm |
Undercarriage
Tracks | Lubricated, fully sealed |
Suspension | Rigid type |
Number of Shoes | 46 |
Track Rollers (each side) | 8 |
US | Metric | |
---|---|---|
Shoe Width – D61EX-23 | 16 in. | 40 cm |
Shoe Width – D61PX-23 | 25 in. | 64 cm |
Grouser Height | 2.1 in. | 5.3 cm |
Capacity
US | Metric | |
---|---|---|
Cooling Capacity | 6.1 gal | 23 L |
Fuel Tank Capacity | 52 gal | 195 L |
Engine Oil Capacity | 4 gal | 15 L |
Hydraulic Tank | 16 gal | 60 L |
The Komatsu D39-22 dozer is notable for its efficiency, durability, and ease of operation. Users of the D39 Komatsu are generally pleased with the powerful engine, precise control system, good maneuverability, and ease of use. Furthermore, the D39-22's fuel efficiency, operator comfort, ease of maintenance, and dependability are among the Decently mentioned features.
Some users, however, have expressed reservations about the Komatsu D39's high price, narrow operator's cabin, and noisy operation. Those looking for an alternative should consider the Komatsu D37 and Cat D5.Komatsu D39 Review
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