General Notes and Company Contacts

The document begins with disclaimers noting that illustrations may not represent the standard product, product availability varies by market, and specifications can change without notice. It lists Doosan Infracore’s global contact points across Europe, America, China, South Africa, Middle East, and Korea.

Product Overview: Doosan DX520LC Excavator

• Engine Power: 245 kW (333 PS) at 1,800 rpm (DIN 6271 net), 245 kW (328 HP) at 1,800 rpm (SAE J1349 net)
• Operating Weight: 50,700 kg (111,800 lb)
• Bucket Capacity: 0.92 to 3.2 m³ (1.20 to 4.19 cu. yd)
• Bucket Width: 2,101 mm with cutter, 2,024 mm without cutter

Engine Technical Specifications

• Model: Doosan DV11, 6-cylinder, water-cooled, turbocharged with air-to-air intercooler
• Piston displacement: 10,964 cc (669 cu. in)
• Max torque: 1,540 Nm (1,137 lbf.ft) at 1,300 rpm
• Starting system: 24V, 7.0 kW electric motor; batteries: 2 x 12V, 150 AH
• High-strength piston rods and shock-absorbing cylinder cushion mechanism for durability

Braking and Structural Features

• Two oil disk brakes on final drive input shafts
• Spring-set, hydraulic-released parking brake (disc type)
• Robust deep, full-reinforced box section structure with heavy-gauge steel plates

Electronic and Hydraulic Systems

• e-EPOS system for optimized power and fuel efficiency
• Hydraulic system supports independent and combined operations
• Automatic 2-speed travel system for traction and speed
• Cross-sensing, fuel-saving pump system and auto idle
• Selectable 2 Working / 2 Power modes
• Computer-aided engine-pump control

Operator's Cab and Controls

• Spacious, independent cab with shock and noise reduction
• Four side safety glass windows; front window slides up and stores in roof; side window opens for ventilation
• Fully adjustable suspension seat and air conditioning
• ISO standard cab
• Pilot pressure control levers: right lever for boom and bucket, left lever for swing and arm
• Independent track drives allow counter-rotation; levers are detachable

Hydraulic Cylinders and Pumps

• Boom cylinders: 2 units, 170 mm bore x 115 mm rod x 1,610 mm stroke
• Arm cylinder: 1 unit, 190 mm x 130 mm x 1,805 mm
• Bucket cylinder: 1 unit, 170 mm x 115 mm x 1,341 mm
• Main pumps: Parallel bent-axis axial piston, max flow 2 x 355 L/min
• Pilot pump: Gear pump, max flow 22 L/min
• Relief valves: Swing motor 225 bar; Boom/Arm/Bucket normal 314 bar; Power boost 343 bar; Travel circuit 314 bar

Noise Levels

• Guaranteed external sound power level: 106 dB(A)
• Measured external sound power level: 105 dB(A)
• Operator noise level: 72 dB(A) (ISO 6396)

Drive and Swing Mechanism

High-torque axial piston motors with planetary reduction gears immersed in oil drive travel and swing. Swing circle uses a single-row shear-type ball bearing with induction-hardened internal gear. Independent track drives enable smooth travel and counter-rotation. Rear swing radius is 3,700 mm; swing speed up to 8.8 rpm.

Undercarriage

• Tractor-type, heavy-duty, all-welded, stress-relieved track frame
• Lifetime-lubricated rollers, idlers, sprockets with floating seals
• Induction-hardened alloy track shoes with triple grousers and heat-treated pins
• Hydraulic track adjusters with shock-absorbing recoil springs
• Travel speeds: 5.0 km/h (high), 3.1 km/h (low)
• Max traction force: 33,600 kgf; continuous gradeability: 35° (70%)

Track Shoe Options and Ground Pressure

Bucket Specifications and Recommendations

Buckets are PCSA type with capacities from 0.92 to 3.20 m³, widths varying with side cutters, and weights from 707 kg to 2,600 kg. Recommended arm lengths correspond to bucket size. Material suitability is categorized as:

• A: Up to 2,000 kg/m³ (heavy materials)
• B: Up to 1,600 kg/m³
• C: Up to 1,100 kg/m³ (lighter materials)

Service Refill Capacities

Dimensions and Working Ranges

• Upper structure width: 2,990 mm
• Cab width: 1,010 mm; height: 3,350 mm
• Tail swing radius: 3,700 mm
• Ground clearance: 770 mm
• Track length: 5,465 mm; gauge: 3,300/2,740 mm
• Track shoe width: 600 mm
• Overall length: 14,050 mm
• Overall track width: 3,900 mm

Digging Forces and Performance

Working Range Parameters (Standard Configurations)

Material Suitability

The excavator is suitable for materials up to 2,000 kg/m³ density, with bucket and arm configurations recommended based on material weight to optimize performance and durability.

Key Features and Best Practices

• Select bucket size and arm length according to material density and job requirements.
• Maintain lubrication levels for engine oil, swing drive, final drive, and hydraulic tank as specified.
• Choose track shoe width and type to balance traction and ground pressure.
• Utilize independent track drives for enhanced maneuverability including counter-rotation.
• Monitor swing speed and radius to operate safely within design limits.

Lifting Capacities Overview

The document includes detailed lifting capacity data for various boom, arm, bucket, and shoe configurations, presented in metric and imperial units. Capacities are based on SAE J1097 standards, with load points defined at the bucket’s back hook.

• Rated loads do not exceed 87% of hydraulic capacity or 75% of tipping capacity for safety.
• Tables cover lifting capacities at multiple heights and reach distances, including front, side, and 360-degree positions.
• Values marked with an asterisk (*) indicate hydraulic capacity-based limits.

Operational Guidelines and Recommendations

• Always verify lifting capacities against specific machine configurations and conditions.
• Use load rating tables to determine safe lifting limits at various boom and arm positions.
• Strictly adhere to rating limits to prevent tipping or hydraulic overload.
• Consult SAE J1097 for detailed rating methodology and compliance.
• Ensure operators are trained to interpret and apply load rating data correctly.

Conclusion

This document serves as a comprehensive technical reference for the Doosan DX520LC excavator, covering engine, hydraulic, structural, operational, and safety specifications. It provides critical data for equipment selection, operation, maintenance, and safe lifting practices, supporting efficient and safe use of the machinery in diverse working conditions.