Basic parameters
| Engine | |
| Model | Cummins |
| Type | Inline |
| Suction | Turbocharged |
| Number of cylinders | 6 |
| Cylinder diameter | 130mm |
| Piston stroke | 160mm |
| Rated power | 294kW/1,800rpm |
| Rotation system | |
| Drive mode | Hydraulic drive |
| Reduction mechanism | Planetary gear reduction |
| Rotation operating brake | Wet multi-disc brake |
| Rotation speed | 9.0rpm |
| Drive device and brake | |
| Steering control | Foot pedal and lever integrated control |
| Drive mode | Hydraulic drive |
| Running motor | Axial piston hydraulic motor |
| Running speed (high/low) | 5.5/3.1km/hr |
| Operation brake | Hydraulic brake |
| Parking brake | Wet multi-disc brake |
| Running section | |
| Center frame | X-frame |
| Track frame | Box section structure |
| Track seals | Self-lubricating track |
| Track adjustment (high/low) | Grease tensioner |
| Number of track shoes | 53 per side |
| Train rollers | 3 per side |
| Roller wheels | 9 per side |
Hydraulic system
| Hydraulic motor | |
| Running motor | Axial piston type ×2 |
| Rotation motor | Axial piston type ×2 |
| Main pump | |
| Type | Variable axial piston pump |
| Maximum flow | 2×390L/min |
| Safety valve setting | |
| Working device hydraulic circuit | 330kg/cm²(32.3Mpa) |
| Running hydraulic circuit | 330kg/cm²(32.3Mpa) |
| Rotation hydraulic circuit | 300kg/cm²(29.4Mpa) |
| Booster hydraulic circuit | 350kg/cm²(34.3Mpa) |
| Cylinder | |
| Boom | 2-170×115×1,650mm |
| Arm | 1-190×130×1.980mm |
| Bucket | 1-170×115×1,341mm |
| Maximum digging force (ISO) | |
| Bucket | 25.7/24.4ton(252/239kN) |
| Arm | 23.5/24.9ton(230/244kN) |
| Oil tank capacity | |
| Fuel tank | 626L |
| Hydraulic oil tank | 390L |
| Coolant/lubricant capacity (replacement) | |
| Radiator | 52.8L |
| Engine | 45L |
| Running reduction gear oil | 2x9L |
| Rotation reduction gear | 2X5L |
Operating Weight
| Track shoes | 600mm |
| Operating weight | 50,500kg |
| Ground pressure | 0.88kg/cm² |
| Bucket | 3.2m³ |
| Breaker | 205 |
Technical Parameters
| Model | DX520 | ||
| Boom | (m) | 7.1 | |
| Arm | (m) | 3.35 | |
| Bucket | (m³) | 2.4 | |
| Maximum digging reach | A | (mm) | 12,125 |
| Maximum digging reach at ground level | B | (mm) | 11,865 |
| Maximum digging depth | C | (mm) | 7,790 |
| Maximum loading height | D | (mm) | 7,865 |
| Minimum loading height | E | (mm) | 3,130 |
| Maximum digging height | F | (mm) | 11,050 |
| Maximum bucket pin height | G | (mm) | 9,690 |
| Maximum vertical arm digging depth | H | (mm) | 4,370 |
| Maximum vertical radius | I | (mm) | 9,970 |
| Maximum digging depth on 8-foot flat ground | J | (mm) | 7,635 |
| Minimum digging radius on 8-foot flat ground | K | (mm) | 3,895 |
| Minimum digging reach | L | (mm) | 653 |
| Minimum rotation radius | M | (mm) | 5,210 |
| Bucket extension angle | d | (°) | 189.1 |
| Tail rotation radius | N | (mm) | 3,800 |
| Transport height (to top of boom) | O | (mm) | 3,610 |
| Transport height (to top of hose) | P | (mm) | 3,705 |
| Transport length | Q | (mm) | 12,110 |
| Transport width | R | (mm) | 3,690 |
| Counterweight ground clearance | S | (mm) | 1,425 |
| Overall height (to top of cab) | T | (mm) | 3,370 |
| Turntable width | U | (mm) | 2,990 |
| Turntable width (CAT WALK) | U' | (mm) | 3,295 |
| Cab height (above turntable) | V | (mm) | 850 |
| Overall cab width | W | (mm) | 1,010 |
| Distance between guide and drive wheels | X | (mm) | 4,475 |
| Track length | Y | (mm) | 5,505 |
| Total width (retracted track/extended track) | Z | (mm) | 3,490/2,990 |
| Track width | a | (mm) | 600 |
| Track height | b | (mm) | 1,190 |
| Minimum ground clearance | c | (mm) | 725 |
