Used Doosan DH220LC-7 Excavator

Reading: 1854

Detailed Introduction of Doosan DH220LC-7 Crawler Excavator

The Doosan DH220LC-7 is a 22-ton class medium crawler excavator developed and manufactured by Doosan Infracore (now integrated into HD Hyundai Infracore), as a star model in Doosan’s classic DH product line. Since its launch, it has been widely recognized by global users for its outstanding durability, fuel efficiency, low operating cost and strong adaptability to harsh working conditions, with cumulative global sales exceeding 120,000 units so far. It is one of the best-selling medium excavators in emerging markets including Southeast Asia, the Middle East, Latin America and China.

1. Core Specifications

Item	Parameter
Operating Weight	21.8 - 22.5 t (varies by configuration)
Standard Bucket Capacity	1.0 m³ (optional 0.92 - 1.2 m³ buckets for different scenarios)
Engine Model	Doosan DL06 in-line 6-cylinder turbocharged, air-to-air intercooled diesel engine
Rated Power	128 kW (174 HP) at 1900 rpm
Max Torque	625 N·m at 1400 rpm
Emission Standard	Tier 2 / Stage II
Max Travel Speed	3.2 km/h (low speed) / 5.5 km/h (high speed)
Max Gradeability	35° (70%)
Swing Speed	12.4 rpm
Bucket Digging Force	137 kN
Arm Digging Force	98 kN
Max Digging Depth	6620 mm
Max Digging Reach	9830 mm
Max Dumping Height	6810 mm
Fuel Tank Capacity	320 L
Hydraulic Oil Tank Capacity	180 L
Standard Track Shoe Width	450 mm (optional 600 mm wide track shoe for wetland operations)

2. Core Performance Advantages

2.1 Power System

The self-developed Doosan DL06 engine adopts an optimized electronic fuel injection system, featuring high torque output at low RPM: it can output 90% of its maximum torque at 1100 rpm, effectively avoiding speed drop under heavy load conditions such as hard rock excavation and hammer breaking. Compared with the previous generation DH220LC-5, its fuel efficiency is improved by 8-10%, and fuel consumption per cubic meter of earthwork is only about 0.12 L, greatly reducing operating costs.

2.2 Hydraulic System

It is equipped with a negative flow control (NFC) hydraulic system, matched with two variable displacement piston pumps with a total flow rate of 430 L/min. The system has fast response speed and excellent coordination of compound actions (such as simultaneous boom lifting, arm retracting and swinging), which reduces operation difficulty and operator fatigue. The built-in power automatic matching function adjusts hydraulic pump output according to actual working load, minimizing energy waste. The standard 1.0 m³ bucket has a 90° swing operation cycle time of only 5.8 seconds, and the earthwork operation efficiency can reach 280-320 m³ per hour, 7% higher than most competitors in the same class.

3. Structural Durability & Reliability

The DH220LC-7 is specially designed for harsh working conditions, and its structural durability leads the same class:

Undercarriage: Adopts reinforced X-type central frame and integrated track frame, made of high-strength low-alloy steel, passing 1.5 million times of fatigue test. The sealed and lubricated track chain, quenched supporting rollers and carrier rollers have a service life 30% longer than similar products. Optional 600mm wide wetland track shoes can adapt to soft terrain such as swamps and tidal flats.
Working Device: The boom and arm are welded with 50mm thick high-tensile steel, with reinforced ribs added at high stress positions, which can adapt to long-time heavy load operations such as breaking and hard rock excavation. The standard bucket is made of wear-resistant steel, with high-chromium alloy cutting edge, and its durability is 20% higher than ordinary buckets.
Cooling System: Adopts parallel aluminum radiator core, with 15% higher heat dissipation efficiency than series radiators, supporting continuous full-load operation at ambient temperature up to 45℃, suitable for high-temperature regions.

4. Operator Comfort & Safety

The cab is certified by ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure), which effectively protects the safety of operators in case of rollover or falling objects.
The internal sound insulation design reduces the operating noise to only 74 dB(A), which is 3-5 dB lower than similar products. The multi-adjustable suspension seat, low-force short-stroke control joysticks and adjustable armrests greatly reduce the fatigue of long-time operation.
The fully digital LCD instrument panel displays real-time parameters such as engine speed, oil temperature, fuel level and fault codes, and has an automatic alarm function for abnormal conditions. The high-efficiency air conditioning system can adjust the cab temperature from 50℃ to 25℃ within 3 minutes, and is equipped with storage compartments, cup holders and radio to improve the operating experience.
The wide frameless front window and side windows provide 270° no-dead-angle vision, and optional rearview camera further improves operation safety.

5. Maintenance Convenience

All daily maintenance points are arranged at accessible positions on the ground, and filters for engine oil, fuel and air can be replaced without climbing the upper car, which reduces maintenance time by 40%.
Extended maintenance cycle: engine oil and filter replacement cycle is 250 operating hours, hydraulic oil replacement cycle is 2000 operating hours, which reduces long-term maintenance costs.
Doosan has a dense global after-sales service network, especially in emerging markets, with sufficient spare parts supply, and the average spare parts price is 30% lower than European and American brands of the same class. The residual value of the whole machine after 3 years of operation can still reach 55-60% of the new machine price, with very high circulation in the second-hand market.

6. Application Scenarios

With strong adaptability and rich optional attachments (hydraulic breaker, grapple, ripper, quick coupler, etc.), the DH220LC-7 can meet the needs of various working scenarios:

Civil engineering: foundation excavation, earthwork transfer, road construction and backfilling;
Mining and quarrying: light and medium hard rock excavation, ore loading, matching with hydraulic breaker for crushing operations;
Municipal works: pipeline laying, landscaping, small demolition, matching with grapple for waste sorting and wood handling;
Water conservancy projects: river dredging, embankment construction, matching with ripper for hard soil loosening.

Conclusion

As a classic model of Doosan, the DH220LC-7 has been verified by more than 20 years of global market practice, and is the preferred choice for both individual contractors and large engineering teams due to its balanced performance, low use cost and high reliability. Although Doosan has launched the updated DX series of excavators, the DH220LC-7 still has a huge stock in the global market and is widely praised by users.

Non flooded

No accident

Original product

Used Doosan DH220LC-7 Excavator

RELATED PRODUCTS

Doosan DX225

Doosan 225-9

Doosan DX130

Doosan DX225-9