Crawler bulldozer D39EX-24

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Overview
The Komatsu D39EX-24 is a compact crawler dozer engineered for precise fine grading and earthmoving. Its PAT (power angle tilt) blade, superior blade visibility and hydrostatic transmission deliver control and productivity in confined and finish-grade applications.

Key advantages

• Compact footprint with quick response for maneuverability on tight job sites
• High blade visibility to improve operator control during grading
• Quick steering and balanced power delivery, including power turn with counter rotation

Features

• Parallel Link Undercarriage System (PLUS): Even wear design to maximize undercarriage component life and reduce maintenance costs; reinforced rollers and links for extended durability.
• PAT dozer with adjustable pitch: Power angle tilt blade with adjustable pitch for versatile grading and finishing tasks.
• Exceptional blade visibility: Super-slant nose configuration improves operator sightlines for accurate blade control.
• HST with electronic control: Electronically controlled hydrostatic transmission provides smooth automatic shifting, Quick-Shift and variable speed selection.
• Easy-access maintenance: Swing-up fan with gas-strut assist and hydraulic reversing fan for convenient cleaning and service access.
• Palm Command Control System (PCCS): Ergonomic low-effort joystick for directional control, travel speed selection and proportional blade control.

Operational notes

• Designed to apply full power to both tracks during turns for effective grading and earthmoving.
• Operator environment includes ROPS cab, air-suspended heated seat, high-resolution LCD monitor with on-board diagnostics and Komtrax telematics capability.

Technical specifications

• Engine model: Komatsu SAA4D95LE-7
• Engine type: 4-cycle, water-cooled, direct injection; variable flow turbocharged with air-to-air aftercooler
• Net power: 105 HP @ 2,200 rpm (ISO 9249 / SAE J1349)
• Power (metric): 78 kW @ 2,200 rpm
• Operating weight: 9,930 kg (21,891 lbs) — machine including PAT dozer, ROPS cab, operator, fluids and full fuel
• Tractor weight: 8,790 kg (19,379 lbs)
• Blade capacity: 2.21 m3 (2.89 yd3)
• Fuel tank: 190 L (50.2 US gal)
• Diesel Exhaust Fluid (DEF) tank: 10 L (2.6 US gal)
• Coolant capacity: 34 L (9 US gal)
• Engine oil: 11 L (2.9 US gal)
• Hydraulic tank: 64 L (17 US gal)
• Undercarriage: PLUS parallel link; monocoque large-section track roller frame; lubricated track rollers; single grouser standard shoes
• Shoe width (standard): 510 mm (20 in)
• Grouser height: 47 mm (1.9 in)
• Number of shoes each side: 39
• Number of track rollers each side: 6
• Ground contact area: 23,919 cm2 (25.75 ft2)
• Ground pressure (standard shoe, ISO 16754): 36.1 kPa (5.24 psi)
• Track gauge: 1,620 mm (5 ft 4 in)
• Length of track on ground: 2,345 mm (7 ft 8 in)
• Hydrostatic transmission: Dual-path HST providing infinite speed changes; variable capacity travel motors; travel control lock lever and neutral switch; quick-shift speeds adjustable in monitor
• Travel speed (variable/forward): 0 - 8.5 kph (0 - 5.3 mph)
• Travel speed (variable/reverse): 0 - 8.5 kph (0 - 5.3 mph)
• Final drive: In-shoe mounted axial-piston travel motors with integrated two-stage planetary reduction; bolt-on sprocket ring with triple labyrinth seal
• Service refill capacities: Final drive 3.5 L (0.9 US gal)
• Standard equipment highlights: ROPS cab, Komatsu Diesel Oxidation Catalyst (KDOC), Selective Catalytic Reduction (SCR), Komtrax Level 5 telematics, electronic high-resolution LCD monitor, hydraulic reversing fan, air conditioner, rear view monitor system, worklamps (front 3, rear 2)