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 under Doosan’s high-performance 9C product line, specially engineered for high-intensity, long-duration operations in complex working conditions. It is widely recognized for its outstanding operating efficiency, ultra-high reliability, low fuel consumption and user-friendly design, and is one of the most competitive models in the 30-ton excavator segment for infrastructure, mining, quarrying and large-scale earthmoving projects.

1. Core Specifications

Parameter	Specific Data
Operating Weight	29.8 – 31.2 t (adjustable with different attachments and counterweights)
Standard Bucket Capacity	1.4 – 1.75 m³ (optional rock bucket, heavy-duty bucket, wide bucket for different scenarios)
Engine Model	Doosan DL08P 6-cylinder inline water-cooled diesel engine
Emission Standard	EU Stage III / US Tier 3 / China National Stage III
Rated Power	189 kW (253 HP) @ 1900 rpm
Max. Digging Depth (standard arm)	7340 mm
Max. Digging Reach (standard arm)	10540 mm
Max. Dumping Height	7110 mm
Bucket Digging Force	187 kN
Arm Digging Force	153 kN
Travel Speed	3.0 / 5.1 km/h
Gradeability	70% (35°)
Swing Speed	10.2 rpm

2. High-Efficiency Power System

The DX300LC-9C is equipped with Doosan’s independently developed DL08 electronic fuel injection diesel engine, which delivers strong power while optimizing combustion efficiency:

Low operating cost: Optimized fuel injection timing and combustion chamber design reduce overall fuel consumption by 6-8% compared to the previous generation DX300LC model, greatly cutting long-term operating expenses.
Strong environmental adaptability: Equipped with a 3-stage fuel filtration system and intake preheating function, it operates stably in high-altitude (up to 4000m above sea level), high-temperature (up to 52℃) and low-temperature (down to -25℃) environments without obvious power attenuation.
Flexible power adjustment: 3 working modes are available for switching according to actual demands: Power (P) mode for heavy rock mining and high-load operations to ensure maximum efficiency; Standard (S) mode for general earthmoving to balance efficiency and fuel consumption; Economy (E) mode for light load and finishing operations to minimize fuel use.
Intelligent energy-saving design: The engine automatically reduces idle speed when the equipment is not operated for 3 seconds, and supports auto-shutdown after long-time idle, further reducing unnecessary fuel waste.

3. Advanced Hydraulic Control System

The model adopts Doosan’s proprietary e-EPOS (Electronic Positive Control System) intelligent hydraulic technology, which perfectly matches engine output and hydraulic system demand:

Smooth composite actions: Optimized main pump and control valve layout ensures lag-free and jitter-free composite operations (such as simultaneous boom lifting + swing, arm retraction + bucket curling), greatly improving operation accuracy and efficiency.
Low energy loss: The load-sensing system automatically adjusts hydraulic flow according to actual load demand, reducing invalid hydraulic power loss and improving energy utilization.
High operation stability: Equipped with a large-capacity independent hydraulic oil cooling system, it maintains stable hydraulic oil temperature even during 24-hour continuous high-load operation, avoiding hydraulic system failure caused by overheating.
Long service life: The hydraulic system uses high-quality imported sealing elements, and the replacement cycle of hydraulic oil is extended to 4000 hours under normal use, greatly reducing maintenance costs.

4. Ultra-High Structural Reliability

The whole machine is designed based on Doosan’s 60+ years of excavator manufacturing experience, and has passed strict anti-fatigue and impact tests to adapt to harsh working conditions:

Working device: The boom and arm are made of high-strength Q345B steel plate, with reinforced plates added at high-stress welding positions, which can withstand long-term impact loads in rock quarrying and mining scenarios.
Undercarriage: The X-type integrated central frame is formed by one-time welding, with strong load-bearing capacity and deformation resistance. Track chain, track shoes, idlers, support rollers and carrier rollers are all made of high-manganese wear-resistant steel with fully sealed lubrication structure, their service life is 30% longer than similar products. Optional undercarriage guard plate effectively prevents damage to chassis parts caused by rock impact.
Bucket: The standard heavy-duty bucket is covered with wear-resistant plates at the bottom and side edges, and equipped with high-hardness bucket teeth, with excellent wear resistance in hard soil and rock operations.

5. Comfortable and Safe Operating Experience

The DX300LC-9C’s cab has passed ROPS (Roll Over Protective Structure) and FOPS (Falling Object Protective Structure) international safety certification, providing maximum safety guarantee for operators:

Low noise and vibration: The fully sealed cab uses multi-layer sound insulation materials, internal operating noise is as low as 72 dB(A). The suspended shock absorption structure isolates most of the vibration from the chassis, greatly reducing operator fatigue during long shifts.
Humanized configuration: The fully adjustable air-suspension seat supports multi-angle adjustment, with lumbar support and adjustable armrests. The pilot control handle has small operating force, suitable for long-term continuous operation.
Intelligent control panel: The 5.7-inch full-color LCD display clearly shows real-time operating parameters such as fuel level, water temperature, hydraulic oil temperature, working hours and fault codes, convenient for operators to grasp equipment status in time.
Daily convenience features: The high-efficiency air conditioning system has 8 adjustable air outlets, with fast cooling and heating effects. It is also equipped with USB charging port, storage box, cup holder and radio. Optional rearview camera eliminates rear blind spots and improves operation safety.

6. Easy Maintenance and Intelligent Management

The DX300LC-9C is designed for convenient maintenance, greatly reducing maintenance time and cost:

Ground-level maintenance points: All daily maintenance points such as oil filter, fuel filter, air filter and hydraulic oil drain port are arranged on the side of the fuselage, accessible directly from the ground without climbing the machine, improving maintenance efficiency.
Two-stage air filtration system: The dry-type air filter with pre-filter effectively filters dust in harsh environments such as mines and quarries, protecting the engine and extending its service life.
Doosan Smart Connect remote management system: Users can remotely check real-time location, working hours, fuel consumption and fault warning information of the equipment through mobile terminals or web platforms, which is convenient for fleet management, and can also remind users of regular maintenance, reducing unplanned shutdown time.

7. Typical Application Scenarios

The DX300LC-9C covers a wide range of operation demands:

Large-scale earthmoving, site leveling, deep foundation excavation
Mining overburden stripping, quarry rock excavation and loading
Infrastructure construction including highways, railways, airports and bridges
Water conservancy projects, port cargo handling and material stacking

Core Advantages Summary

The Doosan DX300LC-9C combines high operating efficiency, low lifecycle cost and strong adaptability to harsh working conditions, making it the preferred cost-effective choice for 30-ton class excavator users pursuing high return on investment.

Non flooded

No accident

Original product

Used Doosan DX300LC-9C Excavator

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