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.
EX5500
ENGINE
| Model | Cummins QSKTA50-CE |
| Type | Water-cooled, 4-cycle, 16-cylinder, turbo-charged and after-cooled, direct injection chamber-type diesel engine |
| Rated power SAE J1995, gross | 2 x 1 044 kW (2 x 1 400 HP) at 1 800 min-1 (rpm) |
| Rated power Net | 2 x 994 kW (2 x 1 333 HP) at 1 800 min-1 (rpm) |
| Maximum torque | 2 x 6 379 Nm (2 x 651 kgf m) at 1 300 min-1 (rpm) |
| Piston displacement | 2 x 50 L |
| Bore and stroke | 159 mm x 159 mm |
| Starting system | 24 V electric motor |
| Batteries | 6 x 12 V , 6 x 220 AH |
| Cold starting | Ether aided |
HYDRAULIC SYSTEM
Hitachi's ETS (Electronic Total control System) can achieve maximum job efficiency by reducing fuel consumption and noise levels, while maximizing productivity through the optimization of engine-pump functions with excellent controllability increasing operator comfort.
| E-P Control (Computer-aided Engine-Pump Control system) | Main pumps regulated by electric engine speed sensing control system. |
| OHS (Optimum Hydraulic System) | 12 main pumps and 6 valves system enable both independent and combined operations of all functions. |
| FPS (Fuel-saving Pump System) | FPS minimizes energy loss with superior performance in fine control. |
| Auto-idling system for saving fuel and reducing noise. | |
| Hydraulic drive cooling-fan system for oil cooler. | |
| Forced-lubrication and forced-cooling pump drive system. |
| Main pumps | 8 variable-displacement, axis piston pumps for front attachment and travel |
| Main pumps Pressure setting | 29.4 MPa (300 kgf/cm2) |
| Main pumps Max. oil flow | 8 X 375 L/min |
| Swing pump | 4 variable-displacement, axis piston pumps for swinging |
| Swing pump Pressure setting | 29.4 MPa (300 kgf/cm2) |
| Swing pump Max. oil flow | 4 X 425 L/min |
| Pilot pump | 2 gear pump |
| Pilot pump Pressure setting | 3.9 MPa (40 kgf/cm2) |
| Pilot pump Max. oil flow | 2 x 108 L/min |
Relief Valve Settings
| Implement circuit | 29.4 MPa (300 kgf/cm2) |
| Swing circuit | 24.5 MPa (250 kgf/cm2) |
| Travel circuit | 29.4 MPa (300 kgf/cm2) |
| Pilot circuit | 3.9 MPa (40 kgf/cm2) |
Hydraulic Cylinders
High-strength piston rods and tubes adopted. 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
Backhoe
Hydraulic Filters
All hydraulic circuits have high-quality hydraulic filters for protection against oil contamination and longer life of hydraulic components.
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. For loading shovel, 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.
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 layout of deck machinery. Sidewalks provide easy access to engines, hydraulic and electrical components. ISO-met stairs and handrails. Sidewalks and stairs are provided with skid-resistant plates.
Swing Mechanism
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 in manually releasable.
| Swing speed | 3.3 min-1 (rpm) |
Operator's Cab
The sturdy cab, with the top guard conforming to OPG Level 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.
| Noise level | 75 dB(A) in the cab; on max. engine speed under no-load condition |
| Eye level height | 7 640 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 with relief valve. Track adjuster provided with protection device against abnormal tension. Travel motion alarm device.
Shovel-type Undercarriage
Triple grouser track shoes of induction-hardened cast steel.
| Shoe width | 1 400 mm |
Numbers of Rollers and Shoes (each Side)
| Upper rollers | 3 |
| Lower rollers | 7 |
| Track shoes | 39 |
Traction Device
Each track driven by high-torque, axial piston motors, allowing counter rotation 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 2.3 km/h Low : 0 to 1.6 km/h |
| Maximum traction force | 2 230 kN (227 000 kgf) |
| Gradeability | 60 % (30 degree) continuous |
WEIGHTS AND GROUND PRESSURE
Loading Shovel
Equipped with 27.0 m3 (heaped) bottom dump bucket
Backhoe
Equipped with 10.6 m BE-boom, 5.3 m BE-arm, and 29.0 m3 (SAE, PCSA heaped) bucket
SERVICE REFILL CAPACITIES
LOADING SHOVEL ATTACHMENTS
Boom and arm are of all-welded, low-stress, high-tensile strength steel fullbox section design. Efficient, automatic level crowding achieved by onelever 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
BACKHOE ATTACHMENTS
Boom and arm are of all-welded, low-stress, full-box section design. Bucket of all-welded, high-strength steel structure.
Bucket
