Used Doosan DX300LC-9C Excavator

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Doosan DX300LC-9C Crawler Excavator Detailed Introduction

The Doosan DX300LC-9C is a 30-ton class heavy-duty crawler excavator developed by Doosan Infracore (now part of HD Hyundai Infracore), designed for mid-to-large scale construction, mining, quarry and infrastructure projects. It is widely recognized for its high fuel efficiency, strong digging power, long-term durability and low operating cost under harsh working conditions.

1. Core Specifications (Standard Configuration)

Item	Parameter
Operating Weight	29.8 ~ 31.2 t (varies with bucket and counterweight configuration)
Standard Bucket Capacity	1.4 ~ 1.71 m³
Rated Net Power	189 kW @ 1900 rpm
Emission Standard	China Stage III / EU Stage IIIA
Max. Digging Depth	7370 mm
Max. Digging Radius	10540 mm
Max. Dumping Height	7200 mm
Swing Speed	9.2 rpm
Travel Speed	3.0 ~ 5.1 km/h
Max. Drawbar Pull	278 kN

2. Powertrain System

The DX300LC-9C is equipped with the Doosan DL08K 6-cylinder turbocharged intercooled common-rail diesel engine, optimized for low fuel consumption and high reliability:

Adopts variable geometry turbocharger (VGT) and precise high-pressure fuel injection technology, improving combustion efficiency by 12% compared with the previous generation DX300LC-7 model, reducing fuel consumption by 8~10% under the same workload.
Equipped with 3-stage fuel filtration system, which adapts to low-quality fuel in remote construction sites and effectively reduces engine failure risk.
Supports 3 adjustable operating modes for scenario-based demand:
- P (Power) mode: Full power output for heavy-duty digging, lifting and quarry operations;
- S (Standard) mode: Balanced power and fuel consumption for general earthmoving works;
- E (Economy) mode: Low power output for light-load operations to maximize fuel saving.
Optional cold start kit supports normal start at temperatures as low as -35℃.

3. Hydraulic System

It adopts Doosan’s proprietary e-EPOS (Electronic Power Optimizing System) for intelligent power matching:

Dual main hydraulic pumps deliver a total maximum flow of 476 L/min, ensuring fast and smooth compound movements (boom lifting + arm pulling + swing) to improve operating efficiency by 10% compared with peers.
Load-sensing control valve provides precise control for attachments, making it compatible with breakers, grapples, augers, rippers and other work tools.
Reinforced hydraulic piping and high-performance sealing components effectively prevent oil leakage, extend the service life of the hydraulic system.

4. Structural Durability

The whole machine structure is verified by 10,000-hour harsh working condition tests and finite element analysis (FEA):

Boom and arm are made of high-strength alloy steel, with thickened wear plates and reinforced welding points at key stress positions, able to withstand long-term impact loads in mining and quarry sites.
Heavy-duty undercarriage adopts high-wear resistance track links, reinforced carrier rollers and idlers, with strong stability on rugged, uneven ground.
X-type box-welded lower frame has excellent torsion resistance, avoiding deformation even under long-term full-load operations.

5. Operator Cabin

The ROPS (Roll-over Protective Structure) / FOPS (Falling Object Protective Structure) certified cabin provides high safety and comfort for long-time operation:

Fully adjustable air suspension seat, automatic air conditioning system and ergonomic low-force joysticks reduce operator fatigue effectively.
8-inch high-definition LCD monitor displays real-time operating data (fuel level, oil temperature, fault codes, etc.) clearly.
Large-area glass windows provide 360° wide visibility, reducing operating blind spots; optional reverse camera further improves rear view safety.
Noise reduction design keeps internal operating noise lower than 76 dB(A).

6. Maintenance & Cost Control

All daily maintenance points are arranged at ground-accessible positions, reducing routine inspection time and difficulty.
Extended maintenance intervals: 500 hours for engine oil change, 5000 hours for hydraulic oil change, 1000 hours for hydraulic oil filter replacement, effectively reducing long-term maintenance cost.
Doosan’s global 24/7 after-sales network provides fast technical support and original spare parts supply, minimizing equipment downtime.

7. Typical Application Scenarios

The DX300LC-9C is suitable for a wide range of operation scenarios:

Medium and large-scale earthmoving works
Road and bridge construction
Quarry mining and aggregate production
Urban demolition and waste handling
Water conservancy and port construction

Optional Configurations

Extended boom/arm package, dedicated breaker pipeline, quick coupler, heavy-duty counterweight, anti-theft system, etc. are available for customized demands.

Overall, the Doosan DX300LC-9C balances high efficiency, low cost and strong reliability, making it one of the most cost-effective 30-ton class excavators for construction contractors worldwide.

Non flooded

No accident

Original product

Used Doosan DX300LC-9C Excavator

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