日立建机 ZX 120

### Hitachi ZX120-6 (Mainstream Version) - Specifications #### **1. General Specifications** - **Model**: Hitachi ZX120-6 Hydraulic Excavator - **Operating Weight**: 12,100 kg (standard configuration) - **Bucket Capacity (SAE heaped)**: 0.52 m³ (standard bucket, range: 0.45–0.65 m³) - **Tail Swing**: Conventional tail swing --- #### **2. Engine** - **Manufacturer**: Isuzu - **Model**: Isuzu AJ-4JJ1X (Stage IIIA / Tier 3 emissions) - **Type**: 4-cylinder, turbocharged, water-cooled diesel engine - **Displacement**: 2.999 L - **Rated Power (Net)**: 69 kW / 93.8 HP @ 2,000 rpm - **Fuel Tank Capacity**: 250 L - **Fuel Consumption**: ~8–12 L/h (typical working conditions) --- #### **3. Hydraulic System** - **Pump Type**: 2 variable displacement axial piston pumps + 1 gear pump - **System Pressure**: 34.3 MPa (343 bar) - **Main Pump Flow**: 2 × 110 L/min - **Auxiliary Flow**: 60 L/min (for breaker circuit) - **Hydraulic Oil Tank**: 110 L --- #### **4. Working Performance** - **Max Digging Reach**: 7,660 mm - **Max Digging Depth**: 5,040 mm - **Max Dumping Height**: 5,710 mm - **Bucket Breakout Force**: 99 kN - **Arm Breakout Force**: 67 kN - **Slewing Speed**: 12.5 rpm - **Travel Speed**: 3.3 / 5.5 km/h (low / high) - **Gradeability**: 35° --- #### **5. Undercarriage & Dimensions** - **Track Shoe Width**: 500 mm (standard steel track) - **Ground Pressure**: 37 kPa - **Transport Dimensions (L×W×H)**: 7,650 × 2,490 × 2,740 mm - **Track Gauge**: 1,990 mm - **Track Length on Ground**: 2,880 mm --- #### **6. Standard Equipment** - ROPS/FOPS certified cabin with A/C - Pilot control joysticks - Auto-idle system - Auxiliary hydraulic circuit for attachments - Hitachi’s HIOS III hydraulic system - Centralized lubrication points