Hitachi ZX70 imported excavator - original equipment parameters

[MikePhua]

The Hitachi ZX70 is a powerful and versatile excavator, designed to tackle a range of heavy-duty tasks in construction and earth-moving operations. With its robust specifications and a powerful engine, it has proven to be an asset on many construction sites worldwide. This machine, manufactured by Hitachi in 2010, has a work history of 15,000 hours and is currently located in Tianjin, China.
Key Specifications of the Hitachi ZX70 Excavator

• Brand: Hitachi
  
• Model: ZX70 (Imported)
  
• Year of Manufacture: 2010
  
• Operating Hours: 15,000 hours
  
• Location: Tianjin, China
  
• Weight: 6,300 kg
  
• Bucket Capacity: 0.28 m³
  
• Boom Length: 3.72 meters
  
• Arm Length: 1.62 meters (Reinforced type)
  

The ZX70 comes with a traditional power system, providing the necessary strength and durability for heavy lifting and digging tasks. Hitachi has been renowned for producing reliable machinery, and the ZX70 is no exception. Despite its age, the performance of this excavator remains high due to regular maintenance and the efficient operation of its components.
Power System and Engine Details

• Engine Model: Isuzu ISUZU CC-4JG1
  
• Rated Power: 40.5 kW at 2,000 rpm
  
• Cooling System: Water-cooled
  
• Cylinder Bore × Stroke: 95.4 mm × 107 mm
  
• Displacement: 3.318 L
  
• Cylinders: 4
  
• Fuel Type: Direct Injection
  

The Isuzu engine provides a balanced performance with enough power to drive the hydraulic systems and operate various tools efficiently. The direct-injection system ensures better fuel efficiency and lower emissions compared to older engines.
Performance and Hydraulic Systems
The performance of the ZX70 is excellent for various applications, from excavation to grading and lifting.

• Ground Pressure: 29 kPa
  
• Swing Speed: 11.3 rpm
  
• Climbing Ability: 70% (35°)
  
• Bucket Digging Force: 55 kN
  
• Arm Digging Force: 38 kN
  
• Travel Speed: 3.4 km/h (low), 5.0 km/h (high)
  

Its hydraulic system consists of variable displacement pumps, which allow the operator to adjust the flow and pressure for different tasks, making it versatile in challenging work conditions. With a maximum flow rate of 63 L/min for the main pumps, this excavator delivers fast and efficient digging and lifting actions.

• Main Pump Max Flow Rate: 2 × 63 + 52.5 L/min
  
• Hydraulic Pressure: 31.4 MPa (main circuit), 22.6 MPa (rotation circuit)
  
• Pilot Oil Pressure: 3.9 MPa
  
• Boom Cylinder Size: 85 mm × 55 mm (single cylinder)
  
• Arm Cylinder Size: 95 mm × 60 mm (single cylinder)
  
• Bucket Cylinder Size: 115 mm × 55 mm (single cylinder)
  

Fuel and Oil Capacity
The ZX70 is designed for long, heavy-duty operations without the need for frequent refueling or maintenance stops.

• Fuel Tank Capacity: 135 L
  
• Hydraulic Tank Capacity: 60 L (full 100 L)
  
• Engine Oil Change Volume: 12 L
  
• Coolant Capacity: 9.5 L
  

These generous capacities ensure that operators can work longer hours without the need for frequent fuel or fluid changes, reducing downtime and improving productivity on site.
Dimensions and Transport Specifications
For transportation, the ZX70 has been designed with a compact and efficient profile, ensuring that it can easily be moved between job sites.

• Transport Length: 6,080 mm
  
• Transport Width: 2,260 mm
  
• Transport Height: 2,600 mm
  
• Cab Height: 2,600 mm
  
• Ground Clearance: 760 mm
  
• Minimum Ground Clearance: 360 mm
  
• Rear Swing Radius: 1,750 mm
  
• Track Length: 2,765 mm
  
• Track Gauge: 1,750 mm
  
• Track Width: 450 mm
  

This model is designed for both urban construction and rural site operations, ensuring maneuverability in tight spaces.
Excavation and Working Range
The ZX70 excels in both digging depth and reach, making it a versatile machine for different digging applications, whether trenching, foundation digging, or material handling.

• Max Digging Radius: 6,320 mm
  
• Max Digging Depth: 4,170 mm
  
• Max Digging Height: 7,150 mm
  
• Max Dumping Height: 5,060 mm
  
• Max Vertical Digging Depth: 3,730 mm
  
• Maximum Effective Digging Depth: 3,820 mm
  

Its superior digging depth and radius make it ideal for a variety of excavation tasks, from road construction to site preparation. The ability to achieve high digging depths ensures that it can tackle challenging soil conditions and large-scale projects with ease.
Conclusion and Recommendations
The Hitachi ZX70 is a durable and reliable excavator that continues to perform at a high level even after 15,000 hours of work. With its strong engine, efficient hydraulic system, and impressive digging performance, this machine remains a valuable asset for any construction site. While it may be older compared to newer models, its overall reliability, ease of maintenance, and robust build make it a solid choice for heavy-duty tasks.
For potential buyers or users, it's important to ensure regular maintenance, especially the hydraulic systems and engine components, to maximize the lifespan and performance of the machine. Consideration of the operating environment and tasks is also critical, as the ZX70’s versatility in various digging depths and working ranges allows it to adapt to a broad range of construction needs.