Doosan DX340LC-9C

The Doosan DX340LC-9C has an operating weight of approximately 34,100 kg (34.1 tons) and a bucket capacity of 1.4–1.6 m³. It is powered by a Doosan DL08 6-cylinder turbocharged diesel engine delivering 191 kW (256 hp) at 1,800 rpm. The DL08 engine features high-pressure common rail electronic injection technology, developed in collaboration with Scania, providing strong fuel efficiency, durability, and stable power output for heavy-duty applications.

Real-world user reports indicate the DX340LC-9C consumes approximately 25 liters per hour under typical operating conditions. The machine achieves this fuel efficiency through the combination of the DL08 high-pressure common rail engine and the EPOS (Electronic Power Optimizing System) + SPC (Smart Power Control) mode integrated management solution. The SPC mode intelligently senses actual working load conditions and automatically adjusts engine speed and main pump torque, reducing fuel consumption while maintaining optimal working performance and lowering equipment failure rates.

The DX340LC-9C features a variable displacement axial piston pump with a maximum flow of 2 × 266 L/min (total 532 L/min). The hydraulic system relief pressure is set at 350 bar (5,076 psi). Bucket digging force reaches 246 kN (24.6 tons) and arm digging force reaches 181 kN (18.1 tons). The hydraulic pump utilizes the EPOS+SPC intelligent matching system, which automatically regulates engine speed and pump torque based on workload, ensuring both digging performance and fuel efficiency. This combination of high hydraulic flow and strong digging forces makes the DX340LC-9C highly capable for tough materials such as rock, clay, and compacted gravel, even as a used unit – provided main pump pressures and hydraulic component conditions are thoroughly inspected before purchase.

Before purchasing a used DX340LC-9C, buyers should focus on the following key inspection points:

• Hydraulic System Leaks: Inspect all hydraulic lines, pipe connections, O-rings, and seals for signs of oil leakage. Loose fittings and degraded sealing elements are common sources of leaks and should be addressed immediately.

• Engine and DPF System (if equipped): Check for excessive black smoke or high operating temperatures, which may indicate fuel system or turbocharger issues. Ensure the machine uses high-quality fuel and filters to maintain engine health.

• Swing Bearing and Undercarriage: Inspect the swing bearing for abnormal noise, excessive vibration, lubricant leakage, or color change in grease – all indicators of potential bearing failure. Check track tension, sprocket and roller wear, and overall undercarriage condition, as replacement costs can be significant.

• Key Components: Verify that core components – including the engine, hydraulic pump, main control valve, and swing motor – are in good working condition with no damage or major repairs in their history.

• Availability of Parts: Note that the DX340LC-9C may have been discontinued, so confirm the availability of genuine replacement parts and after-sales support before finalizing the purchase.

A professional inspection by a qualified mechanic is strongly recommended to identify any underlying issues that may not be visible during a casual walk-around.