Used Hitachi ZX120 Excavator

Reading: 1994

Detailed Introduction of Hitachi ZX120 Crawler Excavator

The Hitachi ZX120 is a 12-ton class medium crawler excavator developed and manufactured by Hitachi Construction Machinery, as a core product in Hitachi's classic ZX mid-sized excavator lineup. It is renowned globally for its high operational efficiency, reliable durability, low fuel consumption and excellent adaptability to complex working conditions, and is widely favored by contractors, rental operators and small-to-medium construction project owners.

1. Core Power System

The ZX120 is equipped with the industry-proven Isuzu AI-4JJ1X 4-cylinder turbocharged intercooled electronic fuel injection diesel engine, which meets EU Stage IIIA / US Tier 3 / China National III emission standards:

Rated net power: 70.9 kW at 2000 rpm, displacement of 2.999L, strong power output for heavy load operation
Supports 3 work mode switching:
- P (Power) mode: For heavy-duty digging, lifting and other high-efficiency demand scenarios
- N (Normal) mode: Balances efficiency and fuel consumption for conventional working conditions
- E (Economy) mode: Maximizes fuel saving for light-load operations such as land leveling and material handling
Built-in automatic idle deceleration and auto-shutdown functions reduce unnecessary fuel loss, with overall fuel consumption 8-12% lower than the previous generation of Hitachi same-class excavators.

2. Hydraulic System

It adopts Hitachi's proprietary HIOS III (Hitachi Integrated Operating System III) negative flow control hydraulic system:

Real-time matching of hydraulic pump output with actual operating demand, effectively reducing redundant hydraulic energy loss
Independent pressure compensation valves for each actuator ensure the movement speed of boom, arm, bucket and swing mechanism is not affected by load changes, achieving smooth and precise composite actions (simultaneous digging, swinging and lifting operations)
Maximum swing torque reaches 10.2 kN·m, maximum travel traction is 107 kN, with 2-speed travel gear, ensuring excellent passability on muddy, sloping and uneven construction sites.

3. Key Specifications (varies slightly with specific versions: ZX120-5, ZX120-6 and regional configurations)

Parameter	Index
Operating weight	11.8 – 12.6 t
Standard bucket capacity	0.52 – 0.65 m³
Maximum digging depth	5,570 mm
Maximum digging reach	8,350 mm
Maximum digging height	8,610 mm
Maximum dumping height	6,170 mm
Travel speed	3.4 / 5.5 km/h
Standard ground pressure	35 kPa
Swing speed	11.5 rpm

4. Structural Durability

Main structural parts (boom, arm, upper frame) are made of high-tensile steel, with reinforced welding at high-stress positions, passing 10,000 hours of extreme working condition fatigue tests to resist deformation and cracking under long-term heavy load.
X-type integral cast lower chassis frame has high rigidity; track shoes, carrier rollers, idlers and travel motors are all treated with wear-resistant and anti-corrosion processes, adapting to long-term operation in gravel, mining and other harsh environments.
Hinged pins are equipped with dust-proof and waterproof sealing rings, greatly extending the service life of wearing parts.

5. Operator Comfort & Safety

The cab meets international ROPS (Roll-over Protective Structure) and FOPS (Falling Object Protective Structure) safety certification, with fully sealed sound insulation design, and the internal operating noise is controlled below 72 dB(A).
Equipped with multi-adjustable air suspension seat, high-efficiency automatic air conditioning with 8 air outlets, adapting to extreme cold and hot working environments.
Ergonomic hydraulic control lever with light operating force, large color LCD monitor displays real-time operating parameters, fault codes, fuel level and maintenance reminders for easy status checking.

6. Maintenance Convenience

All daily maintenance points are centrally arranged on the side of the fuselage, accessible for operation on the ground without climbing the equipment.
Oil filter, fuel filter and air filter adopt quick disassembly structure, shortening daily maintenance time by 40% compared with similar models.
Engine oil replacement interval is 500 operating hours, hydraulic oil replacement interval is extended to 2000 operating hours, effectively reducing downtime and maintenance costs.
Equipped with Hitachi Global e-Service remote monitoring system as standard, supporting real-time viewing of equipment location, operating data, fuel consumption and fault warning via cloud platform, facilitating fleet digital management.

7. Application Scenarios

The Hitachi ZX120 has strong versatility and is suitable for a wide range of scenarios:

Municipal engineering: Road reconstruction, pipe laying, landscaping, old city renovation
Civil construction: Foundation excavation, small building demolition, material handling
Agricultural and forestry projects: Land consolidation, water conservancy ditch digging, nursery planting
Auxiliary operations: Mine site cleaning, port cargo handling, logistics yard sorting

Its moderate size, low ground pressure and flexible maneuverability make it especially suitable for operation in narrow sites such as urban residential areas. Overall, it is one of the most competitive and best-selling 12-ton excavator models in the global market.

Non flooded

No accident

Original product

Used Hitachi ZX120 Excavator

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