Hitachi ZX120 12-Ton Hydraulic Excavator with 30° Gradeability
ZX120 Technical Specifications Table
| Category | Specification |
|---|---|
| Engine | Isuzu 4JJ1X (4-cylinder) |
| Net Power | 109 HP / 81 kW |
| Bucket Capacity | 0.28–0.67 m³ |
| Max Dig Depth | 6.73 m |
| Operating Weight | 12,200–12,800 kg |
| Track Width | 600 mm (standard) |
| Fuel Capacity | 235 L |
| Hydraulic Flow | 378 L/min (total) |
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Key Specifications & Performance Highlights
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Engine & Power
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Engine Model: Isuzu 4JJ1X (Tier 4 Final/Stage V compliant)
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Net Horsepower: 81 kW (109 HP) at 2,000 rpm
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Max Torque: 450 Nm at 1,800 rpm
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Fuel Tank Capacity: 235 L
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Hydraulic System
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Main Pumps: Variable displacement piston pumps × 2
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Max Flow Rate: 2 × 189 L/min
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Relief Valve Pressure: 34.3 MPa
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Bucket Digging Force: 103 kN | Arm Digging Force: 73 kN
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Dimensions & Weights
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Operating Weight: 12,200 - 12,800 kg (with standard bucket)
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Transport Length: 8,350 mm | Width: 2,800 mm | Height: 2,995 mm
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Ground Clearance: 440 mm
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Max Digging Depth: 6,730 mm | Max Dumping Height: 6,640 mm
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Why Choose the Hitachi ZX120?
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Proven Reliability: 10,000+ service hours design life.
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Low Cost of Ownership: High resale value + extended maintenance intervals.
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Global Support: Hitachi dealer network in 150+ countries.
Hitachi ZX120 FAQ: Expert Answers to Top Contractor Questions
Q1: What makes the ZX120 more fuel-efficient than other 12-ton excavators?
A: The ZX120 combines 3 technologies:
Isuzu Eco-Tune Engine: Optimized combustion reduces consumption by 12% vs. older models
Auto-Idle Hydraulics: Cuts unnecessary revs during standby
Eco Mode Switch: Limits max power to 90% for light tasks
Q2: Is the Tier 4 Final engine complicated to maintain?
A: Actually simpler! The ZX120 uses:
DPF-Free Design: No forced regeneration or ash cleaning
SCR-only System: Single DEF tank refill every 50 hrs
50% Longer Service Intervals: Oil changes at 500 hrs (industry avg: 250 hrs)
Q3: Can I use attachments like breakers or grapples?
A: Absolutely. The ZX120 features:
Standard Auxiliary Hydraulics: 2-line system (37 MPa)
Quick Coupler Ready: ISO-compatible interfaces
Smart Flow Control: Auto-adjusts flow for attachments (e.g., 85 L/min for Breakers)
Q4: How does the cab comfort impact productivity?
A: Proven 17% operator fatigue reduction:
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Air Suspension Seat: Redumps vibrations
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72dB Noise Level: Quieter than office AC
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10% Larger Windows: 270° job site visibility
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