Used Doosan 300DX Excavator

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Detailed Introduction of Doosan 300DX Crawler Excavator

The Doosan 300DX is a 30-ton class heavy-duty crawler excavator developed and produced by Hyundai Doosan Infracore, designed for global medium-to-large construction, mining, and infrastructure scenarios. It inherits Doosan’s long-standing strengths in high reliability, low operating cost and strong adaptability to harsh working conditions, and is widely recognized as a cost-effective model in the 30t excavator segment.

1. Core Basic Specifications

Parameter	Specific Value
Operating Weight	29,800 – 31,200 kg (varies with bucket and track configuration)
Standard Bucket Capacity	1.4 – 1.7 m³, optional 1.2 m³ rock bucket / 1.9 m³ bulk material bucket
Maximum Digging Depth	7,260 mm
Maximum Horizontal Digging Reach	10,580 mm
Maximum Digging Height	9,920 mm
Tail Swing Radius	3,350 mm
Rated Travel Speed	3.2 – 5.2 km/h
Gradeability	35° (70%)

2. Powertrain System

The 300DX is equipped with a Doosan-built DL08 6-cylinder turbocharged intercooled diesel engine, which supports different emission standards for different regions (China Stage III, EU Stage IIIA / Stage V, EPA Tier 3 / Tier 4 Final):

Rated power: 189 kW (253 hp) @ 1900 rpm, peak torque up to 1100 N·m @ 1300 rpm, with strong low-speed torque output, which can maintain stable power under heavy load conditions such as rock excavation and quarry stripping
High-pressure common rail fuel injection system, matched with automatic idle and optional auto start-stop function, reduces fuel consumption by 5-8% compared with the previous generation of 30t Doosan excavators, and the comprehensive fuel consumption per hour is about 18-22L under conventional earthmoving conditions
Equipped with multi-stage air filter and fuel filter, which can adapt to dusty and low-quality fuel working conditions in underdeveloped areas.

3. Hydraulic System

It adopts Doosan’s upgraded e-EPOS (Electronic Power Optimizing System) negative flow control hydraulic system, which achieves high matching between engine output and hydraulic load:

Dual axial piston main pump, maximum total flow rate of 490 L/min, system working pressure of 34.3 MPa, fast response speed and smooth compound action (simultaneous boom lifting, slewing and bucket digging without stuttering)
Three working modes are switchable: Power mode (P) for heavy load breaking and rock excavation, Standard mode (S) for conventional earthmoving, Economy mode (E) for light load leveling, which balances work efficiency and fuel consumption
Standard pre reserved auxiliary hydraulic circuit, with adjustable pressure and flow, can directly match various attachments such as hydraulic breaker, hydraulic shear, log grab, ripper, etc.

4. Structural Durability

The whole machine is designed for 10,000 hours of trouble-free operation under harsh working conditions:

Boom, arm and bucket are made of high-strength wear-resistant steel, with reinforced plates added at key stress positions, and passed 120,000 times of fatigue load tests
Integrated X-type lower frame and reinforced crawler frame, with strong impact resistance; optional 600mm/700mm/800mm width track plates to adapt to soft ground, mountain and other different working surfaces
Large-diameter double-row ball slewing bearing, with strong bearing capacity, and optional automatic central lubrication system, which reduces manual maintenance frequency and extends the service life of friction parts
The bucket is equipped with high-hardness alloy bucket teeth, which has 30% longer service life than ordinary bucket teeth and is easy to replace.

5. Operator Comfort & Safety

The cab meets ROPS (Roll-over Protective Structure) and FOPS (Falling Object Protective Structure) certification, which can effectively protect the safety of operators in case of rollover or falling rock accidents
The sealed and sound-insulated cab has an internal operating noise of less than 75 dB(A); it is equipped with an air-suspended adjustable seat with optional heating function, and the pilot control handle has a short stroke and light operating force, which reduces the fatigue of long-term operation
Standard full-color LCD instrument panel, which supports multi-language switching, and can display real-time data such as fuel consumption, working hours, oil temperature, hydraulic pressure and fault codes; it is equipped with automatic constant temperature air conditioning, USB charging port and large storage space
Standard reversing camera, optional rear obstacle radar and 360° panoramic imaging system to eliminate blind spots; hydraulic safety lock is installed, and all actions are locked when the lock is lifted to avoid misoperation.

6. Maintenance & Operation Cost Advantage

Long maintenance interval: engine oil change every 500 working hours, hydraulic oil change every 2000 working hours, pilot filter replacement every 1000 working hours, reducing non-working downtime
All maintenance points are arranged at ground-accessible positions, so users can complete filter replacement, fluid filling and daily inspection without climbing the vehicle
It can be optionally equipped with Doosan Connect remote management system, which supports remote monitoring of equipment location, working status, fuel consumption and fault warning, which is convenient for fleet management and early maintenance arrangement
Doosan has a perfect global after-sales network, with sufficient supply of spare parts and low price, and the life cycle operating cost is about 10% lower than that of the same class of European and American brand excavators.

7. Main Application Scenarios

The Doosan 300DX is suitable for: large-scale earthmoving works, subgrade excavation, site leveling, quarry rock excavation and breaking, water conservancy project construction, urban demolition, port cargo handling, forestry logging and transfer, etc.

Non flooded

No accident

Original product

Used Doosan 300DX Excavator

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