Used Doosan DH300LC-7 Excavator

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Detailed Introduction to DOOSAN DH300LC-7 Crawler Excavator

The Doosan DH300LC-7 is a classic 30-ton heavy-duty crawler excavator developed by Doosan Infracore (now part of HD Hyundai Infracore) for high-demand construction, mining and infrastructure scenarios. As a best-selling model in Doosan’s 7-series excavator lineup, it is widely recognized globally for its outstanding durability, fuel efficiency, low operating cost and strong adaptability to harsh working conditions.

1. Core Specifications

Parameter	Specification
Operating Weight	29,800 – 30,500 kg
Engine Model	Doosan DE08TIS 6-cylinder inline, turbocharged, water-cooled diesel engine
Rated Power	151 kW / 202 HP @ 2,000 rpm
Emission Standard	EU Stage II / US EPA Tier 2
Standard Bucket Capacity	0.92 – 1.62 m³ (common configuration: 1.2 – 1.4 m³ earthmoving/rock bucket)
Travel Speed	3.1 km/h (low) / 5.2 km/h (high)
Swing Speed	10.2 rpm
Max. Digging Depth	7,340 mm
Max. Digging Reach	10,500 mm
Max. Dumping Height	7,110 mm
Ground Pressure	47 kPa
Gradeability	35° (70%)
Fuel Tank Capacity	410 L
Hydraulic Oil Capacity	240 L

2. Key Performance Advantages

High Efficiency & Fuel Economy

The DE08TIS engine features high torque output at low rpm, paired with Doosan’s proprietary Negative Flow Control (NFC) hydraulic system, which delivers fast response, precise operation and smooth coordination of compound actions (e.g., simultaneous boom lifting and swing, arm retracting and bucket digging).
The automatic power matching system adjusts hydraulic pump output in real time according to engine load, reducing unnecessary energy loss. Its fuel consumption is 8-10% lower than similar products in the same class, and earthmoving efficiency can reach 280-320 m³ per hour under standard working conditions.

Extreme Structural Durability

The X-type undercarriage frame is welded with high-strength steel plate and subject to stress relief annealing, with strong resistance to torsion and deformation even under long-term heavy load operations.
The boom and arm are made of high-strength low-alloy thickened steel plates, and all key welds are inspected by ultrasonic flaw detection to avoid cracking. High-manganese steel track shoes, sealed and lubricated track chains, and hardened supporting rollers greatly extend the service life of the walking system.
The large-diameter double-row roller slewing ring has strong bearing capacity, and the normal service life can exceed 12,000 hours under regular maintenance.

3. Operator Comfort & Safety

The cab is certified with ROPS (Roll-over Protective Structure) and FOPS (Falling Object Protective Structure), which fully guarantees the safety of operators in high-risk working scenarios such as demolition and mining.
The sealed and sound-insulated cab has an internal noise level of only 74 dB(A), equipped with a fully adjustable air-suspension seat, ergonomic short-stroke control joysticks, and high-performance heating and cooling air conditioning, reducing fatigue during long hours of operation.
The full LCD digital instrument panel displays real-time operating data including engine speed, oil temperature, fuel level and fault codes, enabling operators to grasp the equipment status at any time. Wide-area windows provide a 360° no-blind-spot view of the working area.

4. Maintenance Convenience

All routine maintenance points (oil filter, fuel filter, hydraulic oil filter, air filter, etc.) are designed to be accessible from the ground, eliminating the need for climbing to high positions for daily maintenance.
Extended maintenance intervals reduce downtime: engine oil and filter replacement every 250 working hours, hydraulic oil replacement every 4,000 working hours, and air filter element replacement every 2,000 working hours.
The built-in fault self-diagnosis system can quickly locate fault points, shortening repair time by more than 30% compared with similar models.

5. Typical Applications & Optional Configurations

Main Application Scenarios

Large-scale earthwork: highway/railway subgrade construction, site leveling, trenching
Mining and quarrying: ore loading, overburden stripping, crushing operations
Municipal engineering: pipeline laying, old building demolition, waste removal
Water conservancy projects: reservoir construction, river dredging, dam reinforcement
Agricultural and forestry projects: land reclamation, forest land clearing

Optional Configurations

Rock bucket, hydraulic breaker, quick coupler, log grapple, ripper, reversing camera, GPS remote management system, reinforced track shoes, heated seat, etc.

The DH300LC-7 has sold more than 120,000 units worldwide since its launch, and remains one of the most popular models in the second-hand construction machinery market due to its high reliability, low after-sales cost and strong parts universality.

Non flooded

No accident

Original product

Used Doosan DH300LC-7 Excavator

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