Used Komatsu 65EXBulldozer

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The Komatsu D65EX-18 is a large-class hydraulic crawler dozer (bulldozer) belonging to Komatsu's EX (Electronic Control) Series. It is designed for heavy-duty earthmoving, mining, and large-scale construction applications. It is one of the most technologically advanced dozers in its class.

📋 General Overview

Item	Detail
Manufacturer	Komatsu Ltd. (Japan)
Model	D65EX-18 (also D65EX-15)
Series	EX Series (Intelligent Machine Control)
Class	Large Dozer (~70-ton class)
Production	~2014–Present
Primary Use	Mining, large earthmoving, land clearing, waste management

🔧 Engine Specifications

Specification	Detail
Engine Model	Komatsu SAA6D125E-5
Type	6-cylinder, turbocharged, aftercooled diesel
Displacement	11.63 L (710 cu in)
Rated Power	447 kW (600 hp) @ 1,800 rpm
Max Torque	~2,500 N·m @ 1,200 rpm
Emission Standard	EPA Tier 4 Final / EU Stage V
Fuel Tank Capacity	~910 L (240 US gal)
DEF Tank	Yes (for SCR system)

📐 Dimensions & Weight

Specification	Detail
Operating Weight	~70,000 kg (154,300 lbs)
Ground Pressure	~85 kPa (12.3 psi)
Length (w/ blade)	~8,800 mm (28.9 ft)
Width (w/ tracks)	~4,200 mm (13.8 ft)
Height (to ROPS top)	~4,300 mm (14.1 ft)
Track Gauge	2,400 mm (7.9 ft)
Ground Clearance	~500 mm (19.7 in)
Track Shoe Width	800 mm (31.5 in)

🔨 Blade & Ripper Specifications

Feature	Detail
Blade Type	S-blade (Straight) / U-blade (Universal) / SU-blade
Blade Capacity	12.7 m³ (16.6 cu yd)
Blade Width	~4,200 mm (13.8 ft)
Blade Height	~1,600 mm (5.2 ft)
Ripper	Single shank (optional dual shank)
Max Ripper Depth	~800 mm (31.5 in)
Ripper Shank	Heavy-duty, hydraulic angle/depth control

🧠 Intelligent Machine Control (iMC) — Key Feature

This is what makes the EX series stand out:

Feature	Description
GPS-Based Grading	Real-time 3D positioning with cm-level accuracy
Automatic Blade Control	Blade height & angle adjusted automatically via GPS
RIPPER Control	Automatic ripper depth and angle control
Cross-Slope Control	Automatic side-slope grading
2D/3D Machine Guidance	Compatible with Topcon, Trimble, Leica systems
Data Logging	All machine data recorded for productivity analysis
Remote Monitoring	Komatsu Smart Construction (IoT-enabled)

🎯 Result: One operator can achieve the productivity of 2–3 conventional operators.

⚡ ECO Mode & Fuel Efficiency

Feature	Detail
ECO Mode	Automatically adjusts engine RPM & hydraulics for fuel savings
Auto Idle Shutdown	Engine auto-stops when idle to save fuel
Fuel Savings	Up to 10–15% compared to conventional dozers
Hydraulic System	Load-sensing hydraulic system with variable displacement pumps

🏗️ Hydraulic System

Specification	Detail
Pump Type	Variable displacement, load-sensing
System Pressure	34.3 MPa (5,000 psi)
Total Flow	~760 L/min (200 US gpm)
Circuit	3-pump system (blade, ripper, steer)
Steering	Hydraulic dual-cylinder steering

🛡️ Operator Comfort & Safety

Feature	Detail
Cab	ROPS/FOPS certified, pressurized & air-conditioned
Seat	Air-suspension, heated, fully adjustable
Display	12.1" full-color LCD monitor (Komatsu Smart Monitor)
Joystick Control	Full electronic joystick (blade, ripper, travel)
Camera System	360° surround view (optional)
Noise Level	~73 dB(A) (very quiet for its class)
Vibration	Low vibration due to hydraulic mounts

🔄 Transmission

Specification	Detail
Type	Powershift, 4-speed (2F + 2R)
Shifting	Electronic, automatic or manual
Travel Speed (F/R)	0–12.5 km/h (0–7.8 mph)
Steering	Clutch & brake steering (hydraulic assist)

📊 Performance Summary

Parameter	Value
Max Drawbar Pull	~270 kN (60,700 lbf)
Max Blade Push Force	~250 kN (56,200 lbf)
Gradeability	30° (58%)
Max Speed	12.5 km/h (7.8 mph)
Operating Life	10,000–20,000 hours

🆚 D65EX-15 vs D65EX-18

Feature	D65EX-15	D65EX-18
Engine Power	447 kW (600 hp)	447 kW (600 hp)
Operating Weight	~65,000 kg	~70,000 kg
Blade Capacity	11.0 m³	12.7 m³
Year Introduced	~2012	~2014
Generation	1st Gen EX	2nd Gen EX (improved)

✅ Advantages

✅	Advantage
1	Intelligent iMC system — highest automation in class
2	Fuel efficient — ECO mode saves 10–15% fuel
3	Operator comfort — best-in-class cab environment
4	Productivity — 1 operator = 2–3 conventional
5	Low maintenance — Komatsu reliability & parts availability
6	Tier 4 Final — meets strict emission standards

❌ Limitations

❌	Limitation
1	High purchase price (~$1M+ USD)
2	Complex electronics — requires trained technicians
3	Heavy — requires heavy-duty transport
4	DEF/AdBlue required — adds operating cost
5	Overkill for small jobs — best suited for large-scale work

🌍 Common Applications

Application	Usage
🏔️ Mining	Overburden removal, waste pushing
🏗️ Large Construction	Site preparation, road building
🌳 Land Clearing	Forest clearing, brush removal
🗑️ Waste Management	Landfill compaction, waste pushing
🛤️ Road Building	Grading, finishing
❄️ Snow Removal	(with snow blade attachment)

💰 Approximate Pricing (2024)

Condition	Price Range
New	$950,000 – $1,200,000 USD
Used (5,000 hrs)	$500,000 – $750,000 USD
Used (10,000+ hrs)	$350,000 – $500,000 USD

📌 Summary

Category	Rating (out of 5)
💪 Power	⭐⭐⭐⭐⭐
🧠 Technology	⭐⭐⭐⭐⭐
🛢️ Fuel Efficiency	⭐⭐⭐⭐
💺 Comfort	⭐⭐⭐⭐⭐
💰 Value for Money	⭐⭐⭐⭐
🔧 Maintainability	⭐⭐⭐⭐

🏆 The Komatsu D65EX-18 is widely regarded as one of the most advanced and productive dozers in the world, especially for large-scale operations where precision, automation, and fuel efficiency are critical.

Would you like more details on any specific aspect — such as maintenance schedule, comparison with CAT D11, or attachment options? 🚜