First Class Used Excavators Japan Used Excavator Hitachi ZX70 7 Ton Hitachi Excavator for Sale

Comprehensive description of Hitachi ZX70 crawler excavator:

1. Basic parameters and core configuration

Machine weight: 7 tons, working weight 6,510 kg, belongs to small excavator, suitable for small and medium earthwork projects and municipal construction.

Bucket capacity: standard 0.3 m³ backhoe bucket, some data marked as 0.28 m³, suitable for light to medium intensity excavation operations.

Power system:

Engine: Equipped with ISUZU CC-4JG1 direct injection four-cylinder turbocharged diesel engine, rated power 40.5 kW (about 54.3 horsepower), speed 2,000 rpm, displacement 3.318 L, in line with Tier 3 emission standards.

Fuel efficiency: The fuel tank capacity is 135 L, which supports a long working time, and users evaluate low fuel consumption.

2. Performance characteristics

Operation capacity:

Digging range: maximum digging depth 4,170 mm, maximum digging height 7,150 mm, maximum unloading height 5,060 mm, covering the needs of small and medium-sized projects.

Digging force: bucket digging force 55 kN, digging force 38 kN, providing stable and efficient digging performance.

Travel and rotation: travel speed is divided into two gears (5.0/3.4 km/h), rotation speed 11.3 rpm, climbing ability 70% (35°), adapt to complex terrain.

Hydraulic system:

Main pump configuration: adopts a combination of three-variable piston pump + one gear pump, the main overflow pressure is 31.4 MPa, the power distribution is precise, and the energy consumption is low.

Motor type: the travel motor is a dual-variable piston pump, and the rotary motor is a single-variable piston pump, taking into account flexibility and stability.

3. Design and durability optimization

Structural reinforcement:

Lower walking body: track shoe width 450 mm, track gauge 1,750 mm, ground pressure 30 kPa, equipped with a reinforced X-beam structure to improve impact resistance.

Front-end device: boom length 3,720 mm, stick length 1,620 mm (reinforced type), key connection parts are made of wear-resistant materials to extend service life.

Cab design:

Wide-view cab (full height 2,600 mm), standard suspension seat and dustproof design, some models can be equipped with air conditioning system, and the operation panel is reasonably laid out to improve comfort.

4. Maintenance and applicable scenarios

Maintenance convenience:

Maintenance parts are centrally arranged, fuel filters, oil filters, etc. are easy to replace, hydraulic oil tank capacity is 69 L (full 100 L), engine oil replacement volume is 12 L, reducing maintenance costs.

Radiator and dust screen support quick cleaning to reduce downtime.

Applicable scenarios:

Universal design, suitable for small and medium-sized projects such as earthwork, municipal construction, and farmland transformation; no standard bulldozer, which needs to be selected according to needs.

5. Market positioning and technology iteration

Market positioning: As Hitachi's 7-ton representative model, ZX70 is known for its high cost performance and reliability, especially in the domestic market (produced in Hefei, Anhui), and is widely favored by small and medium-sized engineering contractors.

Technical features: Compared with high-end models (such as the ZX200 series), it does not carry HIOSⅢ hydraulic technology, but optimizes the hydraulic control logic and structural strength to meet basic operation needs.