Used Doosan 300DXExcavator

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The Doosan DX300LC (often called the 300DX) is one of Doosan Infracore's most popular 30-ton class hydraulic excavators, widely used in construction, mining, and heavy-duty earthmoving operations worldwide.

📋 1. GENERAL OVERVIEW

Item	Details
Model	DX300LC-5 / DX300LC-7 (Latest Gen)
Class	30-Ton (Medium-Large Excavator)
Manufacturer	Doosan Infracore (South Korea)
Primary Use	Excavation, loading, demolition, mining, road construction
Production	Ongoing (Updated to Stage V / Tier 4 Final)

⚙️ 2. ENGINE SPECIFICATIONS

Parameter	DX300LC-5	DX300LC-7 (Latest)
Engine Model	Doosan DL08K	Doosan DL08K (Stage V)
Type	6-Cylinder, Turbocharged, Intercooled Diesel	6-Cylinder, Turbocharged, Intercooled Diesel
Displacement	7.64 L	7.64 L
Rated Power	154 kW (206 hp) @ 1,900 rpm	162 kW (217 hp) @ 1,900 rpm
Emission Standard	Tier 4 Final / Stage IV	Tier 4 Final / Stage V
Aftertreatment	DPF + SCR (DEF/AdBlue)	DPF + SCR (DEF/AdBlue)
Fuel Tank	~400 L	~400 L

🔑 The DL08K engine is known for its fuel efficiency, durability, and low emissions, making it compliant with the strictest global emission standards.

📐 3. DIMENSIONS & WEIGHT

Parameter	Value
Operating Weight	29,800 – 31,000 kg (varies by configuration)
Transport Length	9,970 mm
Transport Width	3,190 mm
Transport Height	3,240 mm
Ground Clearance	460 mm
Track Width	600 mm (Triple grouser option available)
Track Shoe Length	4,500 mm
Tail Swing Radius	3,220 mm

🏗️ 4. PERFORMANCE (Working Range)

Parameter	Value
Max Digging Depth	7,110 – 7,200 mm
Max Digging Reach	9,880 – 10,030 mm
Max Dumping Height	7,140 mm
Max Dumping Reach	6,720 mm
Max Vertical Wall Digging	6,100 mm
Max Pull Force	~200 kN (20.4 tonf)
Swing Speed	8.8 rpm
Travel Speed	5.2 km/h (High) / 3.2 km/h (Low)
Bucket Capacity (Std.)	1.0 – 1.6 m³ (varies by attachment)

🪣 5. HYDRAULIC SYSTEM

Feature	Detail
System Type	Load-Sensing Hydraulic System with EPC (Electronic Power Control)
Main Pump	2 × Variable Displacement Axial Piston Pump
Max Flow Rate	2 × 240 L/min = 480 L/min total
Operating Pressure	34.3 MPa (350 bar)
Hydraulic Circuit	Open Center

✅ The EPC (Electronic Power Control) system optimizes engine speed and hydraulic flow automatically, improving fuel efficiency by up to 10-15% compared to conventional models.

🖥️ 6. OPERATOR CAB & COMFORT

Feature	Detail
Cab Type	ROPS/FOPS Certified, Pressurized & Air-Conditioned
Seat	Air-Suspension Seat with Heating & Armrest
Display	7-inch Color LCD Monitor (DX300LC-7)
Controls	Joystick + Pedal with Auto-Idle
Noise Level	~68 dB(A) (very quiet for its class)
Climate Control	Auto A/C with Dust/Pollen Filter
Visibility	Large front & rear windows, rearview camera
USB/Bluetooth	Available on latest models

🔧 7. KEY FEATURES & TECHNOLOGIES

#	Technology	Description
1	EPOS (Excavator Power Optimization System)	Auto-optimizes engine & pump output for max efficiency
2	DoosanCONNECT™	Remote machine monitoring, diagnostics, fleet management via telematics
3	Smart Work System	10 preset work modes (loading, digging, lifting, etc.) for one-touch operation
4	Auto Idle Stop	Engine auto-shuts off after 5 min of inactivity to save fuel
5	Auto Swing Stop (ASS)	Auto-stops swing when not in use to reduce fuel consumption
6	Heavy-Duty Undercarriage	Reinforced X-frame, durable track rollers & idlers
7	Boom/Arm Reinforcement	High-strength steel for extended service life
8	Easy Maintenance Access	Ground-level service points, large-opening engine hood
9	LED Work Lights	Standard front & rear LED lights for night operation
10	Anti-Theft System	Immobilizer + GPS tracking (optional)

🔄 8. ATTACHMENT OPTIONS

Attachment	Application
Standard Bucket	General excavation
Rock Bucket (Heavy Duty)	Quarry & mining
Grapple	Scrap handling, demolition
Hydraulic Breaker (Hammer)	Rock breaking, concrete
Thumb	Pipe handling, log grabbing
Quick Coupler	Fast attachment change
Shear	Demolition
Compactor Plate	Trench compaction
Ripper	Hard ground breaking

📊 9. COMPARISON WITH COMPETITORS

Spec	Doosan DX300LC-7	CAT 330	Komatsu PC300-11	Hyundai R300LC-7
Power	217 hp	270 hp	247 hp	261 hp
Weight	~30,000 kg	31,900 kg	30,700 kg	30,600 kg
Bucket	1.0–1.6 m³	1.1–1.7 m³	1.1–1.6 m³	1.1–1.6 m³
Fuel Efficiency	⭐⭐⭐⭐⭐	⭐⭐⭐⭐	⭐⭐⭐⭐	⭐⭐⭐⭐
Tech Features	⭐⭐⭐⭐⭐	⭐⭐⭐⭐⭐	⭐⭐⭐⭐	⭐⭐⭐⭐
Price (Relative)	💰💰💰 (Competitive)	💰💰💰💰	💰💰💰💰	💰💰💰

🏆 Doosan DX300LC is known for the BEST fuel efficiency and value-for-money in its class.

✅ 10. ADVANTAGES SUMMARY

✅ Advantage	📝 Detail
🏆 Fuel Efficiency	EPOS + EPC saves 10-15% fuel vs competitors
🔧 Low Maintenance Cost	Long service intervals (500h), easy access
🏠 Operator Comfort	Best-in-class cab, low noise, excellent A/C
📱 Connected Technology	DoosanCONNECT for fleet management
💪 Durability	Heavy-duty X-frame, reinforced boom/arm
💰 Value for Money	Lower purchase price than CAT/Komatsu with similar performance
🌍 Global Parts Network	Wide dealer & parts network in 100+ countries

📌 11. TYPICAL APPLICATIONS

🏗️ Application	📋 Details
General Construction	Foundation, road building, utility work
Mining & Quarrying	Rock excavation, loading trucks
Demolition	Building teardown with breaker/shear
Pipe Laying	Trenching with thumb attachment
Landscaping	Grading, pond digging
Loading Operations	Loading dump trucks, barges

🏁 CONCLUSION

The Doosan DX300LC (300DX) is a best-in-class 30-ton excavator that combines powerful performance, excellent fuel efficiency, cutting-edge technology, and outstanding operator comfort at a competitive price point. It is an ideal choice for contractors who demand productivity, reliability, and low operating costs.

Would you like more details on any specific aspect like pricing, maintenance schedule, or comparison with a specific model? 🚧💪