Crawler bulldozer D39PX-24

trackedoutdoorfor construction

Product overview
The D39PX-24 crawler dozer combines excellent blade visibility with balanced low-ground-pressure performance. Suited for grading and earthmoving where flotation and operator control are required, it offers a PAT (Power Angle Tilt) adjustable-pitch blade and an HST drive with electronic control including Quick-Shift modes.

Key highlights

• Compact footprint with responsive control
• High blade visibility for precise grading
• Low ground pressure for improved flotation and balance

Features and benefits

• Parallel Link Undercarriage System (PLUS): Even-wearing design providing near 100% use of undercarriage components, reducing maintenance costs up to 40% versus conventional undercarriages; strengthened rollers and links extend wear life up to two times.
• PAT dozer with adjustable pitch: Power Angle Tilt blade with adjustable pitch expands versatility across grading, spreading and finish applications.
• Exceptional blade visibility: Super-slant nose design improves sightlines to the blade for better machine control and productivity.
• HST with electronic control: Fully electronic hydrostatic transmission enables smooth automatic shifting, Quick-Shift or variable speed selection for application flexibility.
• Easy-access maintenance: Swing-up fan with gas-strut assist grants access to radiator, oil cooler and charge-air cooler; hydraulic reversing fan clears debris from coolers.
• Palm Command Control System (PCCS): Ergonomic joystick controls directional movement, travel speed and counter-rotation; includes electronic proportional blade control.

Resources (references on product page)

• Downloadable product brochure (PDF)

Technical specifications

• Model: D39PX-24
• Brand: Komatsu
• Category: Small dozers
• Horsepower: 105 HP @ 2,200 rpm (ISO/SAE net: 105 HP)
• Horsepower (kW): 78 kW @ 2,200 rpm
• Engine model: Komatsu SAA4D95LE-7
• Engine type: 4-cycle, water-cooled, direct injection; variable flow turbocharged with air-to-air aftercooler
• Number of cylinders: 4
• Bore x stroke: 95 x 115 mm (3.75 x 4.52 in)
• Piston displacement: 3.26 L (199 in³)
• Rated rpm: 2,200
• Lubrication: Full-flow filter; gear pump, force lubrication
• Operating weight (kg): 10 350
• Operating weight (lbs): 22,817
• Tractor weight (kg): 9 140
• Tractor weight (lbs): 20,150
• Blade capacity: 2.4 m³ (3.14 yd³)
• Undercarriage suspension: Rigid type
• Track roller frame: Monocoque, large section, durable construction
• Rollers and idlers: Lubricated track rollers
• Type of shoes (standard): Single grouser
• Number of track rollers (each side): 6
• Number of shoes (each side): 39
• Grouser height: 47 mm (1.9 in)
• Shoe width (standard): 635 - 700 mm (25 - 27.5 in)
• Ground contact area: 29,782 - 32,970 cm² (32 - 35.5 ft²)
• Ground pressure (with standard shoe, ISO 16754): 27.4 - 30.1 kPa (0.28 - 0.31 kg/cm²; 3.98 - 4.39 psi)
• Track gauge: 1,620 mm (5 ft. 4 in)
• Length of track on ground: 2,345 mm (7 ft. 8 in)
• Final drive: In-shoe mounted axial-piston travel motors with integrated two-stage planetary gear reduction; bolt-on sprocket ring with triple labyrinth seal design
• Hydrostatic transmission: Dual-path HST providing infinite speed changes up to 8.5 mph; variable capacity travel motors; travel control lock lever and neutral switch; quick-shift speeds adjustable in monitor
• Travel speed (variable/quick shift modes): Up to 8.5 kph (0 - 5.3 mph) in variable mode; quick-shift mode with selectable ranges (1st, 2nd, 3rd)
• Steering: Palm Command Control System (PCCS) joystick; hydrostatic transmission provides smooth, powerful turns; minimum turning radius (pivot track marks): 2.4 m (94 in)
• Service/refill capacities: Fuel tank 190 L (50.2 US gal); DEF tank 10 L (2.6 US gal); Coolant 34 L (9 US gal); Engine oil 11 L (2.9 US gal); Final drive 3.5 L (0.9 US gal); Hydraulic tank 64 L (17 US gal)
• Operator environment & safety: ROPS cab; air-suspension heated fabric seat with headrest; 3" retractable seat belt; electronic high-resolution LCD color monitor with on-board diagnostics; New Operator Identification System
• Emissions & aftertreatment: EPA Tier 4 Final / EU Stage 4 certified; cooled EGR, Komatsu Diesel Oxidation Catalyst (KDOC) and Selective Catalytic Reduction (SCR); real-time DEF monitoring
• Standard equipment highlights: Air conditioner, hydraulic fan (electronic control), Komtrax Level 5 telematics, back-up alarm, large capacity batteries, radiator guard, wide core cooling package, front and rear worklamps (Front 3, Rear 2), PLUS track shoe assembly, triple labyrinth final drive
• Optional / rear equipment: Dozer assembly, hitch, hydraulics for rear equipment, full-length track roller guard, alternate shoe widths available