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PC390LC-11
High production earthmoving from an excavator designed to be easily transportable.
- Horsepower: 257 HP @ 1,950 rpm
- Operating weight: 87,867 - 90,441 lbs.
- Bucket capacity: 0.89 - 2.91 yd³
Specifications
Engine
| Model | Komatsu SAA6D114E-6* |
| Type | Water-cooled, 4-cycle, direct injection |
| Aspiration | Komatsu Variable Geometry Turbocharger with air-to-air aftercooler and EGR |
| Number of cylinders | 6 |
| Bore | 4.49 in |
| Stroke | 5.69 in |
| Piston displacement | 540 in³ |
| Horsepower: | |
| SAE J1995 - Gross | 271 HP |
| ISO 9249/SAE J1349 - Net | 257 HP |
| Rated rpm | 1,950 |
| Governor | All-speed control, electronic. |
| Fan drive method for radiator cooling | Mechanical |
| *EPA Tier 4 Final emissions certified |
Hydraulics
Type: HydrauMind (Hydraulic Mechanical Intelligence) system, closed-center system with load sensing valve and pressure compensated valves, 6 selectable working modes
| Main pump: | |
| Pumps for | Boom, arm, bucket, swing, and travel circuits |
| Type | Variable displacement piston type |
| Maximum flow | 141 US gpm |
| Supply for control circuit | Self-reducing valve |
| Hydraulic motors: | |
| Travel | 2 x axial piston motor with parking brake |
| Swing | 1 x axial piston motor with swing holding brake |
| Relief valve setting: | |
| Implement circuits | 5,400 psi |
| Travel circuit | 5,400 psi |
| Swing circuit | 4,050 psi |
| Pilot circuit | 470 psi |
| Hydraulic cylinders: | |
| Number of cylinders | Bore x Stroke x Rod Diameter |
| Boom / 2 | 5.5 x 58.3 x 3.9 in |
| Arm / 1 | 6.3 x 71.9 x 4.3 in |
| Bucket / 1 - for 0 ft. 5 in and 13 ft. 2 in Arms | 5.5 x 50.6 x 3.9 in |
| Bucket / 1 - for 8 ft. 4 in Arm | 5.9 x 50.6 x 4.3 in |
Drives and Brakes
| Steering control | Two levers with pedals |
| Drive method | Hydrostatic |
| Maximum drawbar pull | 73,880 lbs. |
| Gradeability | 70%, 35° |
| Maximum travel speed: (Auto-Shift) | |
| High | 2.7 mph |
| Mid | 2.2 mph |
| Low | 1.7 mph |
| Service brake | Hydraulic lock |
| Parking brake | Mechanical disc brake |
Swing System
| Drive method | Hydrostatic motor |
| Swing reduction | Planetary gear |
| Swing circle lubrication | Grease-bathed |
| Service brake | Hydraulic lock |
| Holding brake/Swing lock | Mechanical disc brake |
| Swing speed | 9.5 rpm |
| Swing torque | 82,313 ft.-lbs. |
Undercarriage
| Center frame | X-frame |
| Track frame | Box-section |
| Track type | Sealed |
| Track adjuster | Hydraulic |
| Number of shoes | 49 each side |
| Number of carrier rollers | 2 each side |
| Number of track rollers | 8 each side |
Coolant & Lubricant Capacity (Refilling)
| Fuel tank | 159.8 US gal |
| Coolant | 9.7 US gal |
| Engine | 10.2 U.S. gal |
| Final drive, each side | 2.8 US gal |
| Swing drive | 3.7 US gal |
| Hydraulic tank | 49.7 US gal |
| Diesel Exhaust Fluid (DEF) tank | 10.3 US gal |
Operating Weight (Approximate)
Operating weight includes 21 ft. 3 in one-piece HD boom, 10 ft. 5 in arm, SAE heaped 2.53 yd3 bucket, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.
| Shoes | 28 in |
| Operating Weight | 87,867 lbs. |
| Ground Pressure | 8.66 psi |
| Shoes | 31.5' in |
| Operating Weight: | 88,976 lbs. |
| Ground Pressure | 7.67 psi |
| Shoes | 33.5 in |
| Operating Weight: | 89,940 lbs. |
| Ground Pressure | 6.90 psi |
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