Downloadable brochures and spec sheets for current and non-current models are here.
Interview with Designers of the Ultra-Large Excavators
The cutting-edge technologies for downtime and maintenance cost reduction, developed on the world-class EX8000 Ultra-Large Excavator, are adopted to the New EX-6 Series Giant Models.
ELECTRIC MOTOR
High Voltage, Three Phase, Squirrel Cage Induction Motor, Totally Enclosed Air-to-Air-Cooled (TEAAC).
| Type | HITACHI TFOA-KK |
| Rating Rated continuous output | 1 200 kW |
| Rating Voltage | AC 6 000 - 6 600 V / 50 Hz AC 6 600 - 6 900 V / 60 Hz |
| Number of poles | 4 |
| Synchronous RPM | 1 500 min-1 / 50 Hz 1 800 min-1 / 60 Hz |
| Rated current | 124 A @ 6 600 V |
| Insulation class | F class B raise |
Space heater included. Thermo-guard (temperature detector)
| Starting condition | Reactor 50 % tap |
HYDRAULIC SYSTEM
| OHS (Optimum Hydraulic System) | 8 main pumps and 4 valves system enable both independent and combined operations of all functions. |
| Hydraulic drive cooling-fan system for oil cooler. | |
| Forced-lubrication and forced-cooling pump drive system. | |
| Main pumps | 8 variable-displacement,axial piston pumps for front attachment,travel and swing |
| Main pumps Pressure setting | 29.4 MPa (300 kgf/cm2) |
| Main pumps Max. oil flow | 8 X 500 L/min |
| Pilot pump | 1 gear pump |
| Pilot pump Pressure setting | 4.4 MPa (45 kgf/cm2) |
| Pilot pump Max. oil flow | 110 L/min |
Relief Valve Settings
| Implement circuit | 29.4 MPa (300 kgf/cm2) |
| Swing circuit | 29.4 MPa (300 kgf/cm2) |
| Travel circuit | 29.4 MPa (300 kgf/cm2) |
| Pilot circuit | 4.4 MPa (45 kgf/cm2) |
Hydraulic Cylinders
High-strength piston rods and tubes. Cylinder cushion mechanisms are provided for boom, arm, bucket and dump cylinders. Bucket cylinders of loading shovel are provided with protector.
Cylinder Dimensions Loading shovel
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Hydraulic Filters
All hydraulic circuits have high-quality hydraulic filters for protection against oil contamination and longer life of hydraulic components.
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These filters are centralized in arrangement for facilitating maintenance.
CONTROLS
2 Implement Levers
Electric joystick control levers. Right lever is for boom and bucket control, left lever for swing and arm control. 2 pedals provided for opening/closing the bottom dump bucket.
2 Travel Levers with Pedals
Remote-controlled hydraulic servo system. Independent drive at each track allows counter rotation of tracks.
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UPPERSTRUCTURE
Revolving Frame
A deep, full-reinforced box section. Heavy-gauge steel plates used for ruggedness.
Deck Machinery
Maintenance accessibility is the major feature in the lay-out of deck machinery. Sidewalks provides easy access to electric motor, hydraulic and electrical components. ISO-met stairs and handrails. Sidewalks and stairs are provided with skid-resistant plates.
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Swing Device
4 high-torque, axial-piston motors with two-stage planetary gear bathed in oil. Swing circle with dirt seals is a heavy-duty, triple-row, cylindrical roller bearing. Induction-hardened internal swing circle gear and pinion immersed in lubricant. Parking brake of springset/hydraulic-released disc type. This parking brake is manually releasable.
| Swing speed | 2.9 min-1 (rpm) |
Operator's Cab
The sturdy cab, with the top guard conforming to OPG Leve II (ISO), helps protect the operator from falling objects. Independent, pressurized, 1 800 mm wide, 2 150 mm high, roomy 7.5 m3 cab with tinted-glass windows features all-round visibility. Air-suspension type, fully adjustable reclining seat with armrests; movable with or without front & swing control levers by slide. Instruments and control panel are within easy reach of the operator. 3 air conditioner system.
| Eye level height | 6 760 mm |
UNDERCARRIAGE
Tracks
Shovel-type undercarriage. Dual-flanged-type bolt linkage for side frame and X-form center frame assures durability. Heavy-duty track frame of all-welded, stress-relieved structure. Top-grade materials used for toughness. Lifetime-lubricated induction-hardened track rollers, idlers and drive tumblers with floating seals. Specially heat-treated connection pins. Hydraulic track adjuster provided with N2 gas accumulator and relief valve. Track adjuster provided with protection device against abnormal tension. Travel motion alarm device.
Shovel-type Undercarriage
Triple grouser shoes of induction-hardened cast steel.
| Shoe width | 1 270 mm |
Numbers of Rollers and Shoes on Each Side
| Upper rollers | 3 |
| Lower rollers | 8 |
| Track shoes | 38 |
Travel Device
Each track driven by high-torque, axial piston motors, allowing counterrotation of tracks. 2-stage planetary gear plus spur gears reduction device. Dual-support-type traction device. Parking brake of spring-set/hydraulic-released disc type. This parking brake is manually releasable.
| Travel speeds | High : 0 to 2.1 km/h Low : 0 to 1.6 km/h |
| Maximum traction force | 1 760 kN (179 500 kgf) |
| Gradeability | 60 % (30 degree) max. |
WEIGHTS AND GROUND PRESSURE
Loading Shovel
Equipped with 21.0 m3 (heaped) bottom dump bucket
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SERVICE REFILL CAPACITIES
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LOADING SHOVEL ATTACHMENTS
Boom and arm are of all-welded, low-stress, high-tensile strength steel full-box section design. Efficient, automatic level crowding achieved by one-lever control as the parallel link mechanism keeps the bucket digging angle constant, and level cylinder circuit maintains the bucket height constant.
(Auto-Leveling Crowd Mechanism)
Bucket
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