Used Hitachi ZX120 Excavator

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📌 1. Overview

Item	Detail
Manufacturer	Hitachi Construction Machinery Co., Ltd.
Model Series	ZX120 (ZX120-5, ZX120-5A, ZX120-6, etc.)
Class	12-ton (Mini/Compact Excavator)
Production	Ongoing (latest gen: ZX120-6 / ZX120-6A)
Primary Markets	Construction, landscaping, utilities, road work, demolition

The Hitachi ZX120 is one of the most popular 12-ton class mini excavators in the world, known for its reliability, fuel efficiency, and compact size that allows it to work in tight spaces while delivering performance comparable to larger machines.

📌 2. Engine & Powertrain

Specification	ZX120-5 / 5A	ZX120-6 / 6A (Latest)
Engine Model	Isuzu 4JJ1-TC	Isuzu 4JJ1XQP
Type	4-cylinder, turbocharged, intercooled diesel	4-cylinder, turbocharged, intercooled diesel
Displacement	2,999 cc	2,999 cc
Rated Power	74.5 kW (100 hp) @ 2,000 rpm	74.5 kW (100 hp) @ 2,000 rpm
Max Torque	~373 N·m @ 1,400 rpm	~392 N·m @ 1,400 rpm
Emissions Standard	Tier 4 Final / Stage IV	Tier 4 Final / Stage V
Aftertreatment	DPF + SCR (DEF)	DPF + SCR (DEF)
Fuel Tank Capacity	~200 L (52.8 gal)	~200 L (52.8 gal)

✅ The ZX120-6 engine features improved combustion efficiency and lower fuel consumption (~5–8% improvement over the -5 model).

📌 3. Dimensions & Weight

Specification	ZX120-5	ZX120-6
Operating Weight	11,900 – 12,100 kg (26,235 – 26,676 lbs)	12,000 – 12,300 kg (26,455 – 27,117 lbs)
Transport Length	7,190 mm (23.6 ft)	7,240 mm (23.8 ft)
Transport Width	2,480 mm (8.1 ft)	2,480 mm (8.1 ft)
Transport Height	2,720 mm (8.9 ft)	2,740 mm (9.0 ft)
Ground Clearance	400 mm (15.7 in)	400 mm (15.7 in)
Track Width	1,800 mm (5.9 ft) — adjustable	1,800 mm (5.9 ft) — adjustable
Track Shoe Width	400 / 450 / 500 / 600 mm (options)	400 / 450 / 500 / 600 mm (options)
Tail Swing Radius	1,750 mm (5.7 ft)	1,750 mm (5.7 ft)

✅ The zero tail swing (ZTS) design makes it ideal for working near buildings and obstacles.

📌 4. Hydraulic System

Specification	Detail
System Type	Open center load-sensing hydraulics
Main Pump	2 × Variable displacement axial piston pumps
Total Flow Rate	~2 × 120 L/min (254 GPM)
Working Pressure	34.3 MPa (5,000 psi)
Swing Circuit	Closed center with brake
Travel Motors	2 × Axial piston motors with parking brake
Auxiliary Hydraulics	2 circuits available (for breaker, grapple, etc.)

✅ The Hi-EPS (High-Efficiency Power System) on the ZX120-6 optimizes engine-pump matching, reducing fuel consumption by up to 10% compared to previous models.

📌 5. Performance (Digging Specifications)

Specification	ZX120-5	ZX120-6
Max Digging Depth	5,720 mm (18.8 ft)	5,740 mm (18.8 ft)
Max Digging Reach	6,730 mm (22.1 ft)	6,750 mm (22.1 ft)
Max Digging Height	6,980 mm (22.9 ft)	7,000 mm (23.0 ft)
Max Dump Height	4,820 mm (15.8 ft)	4,850 mm (15.9 ft)
Max Vertical Wall Digging	4,320 mm (14.2 ft)	4,350 mm (14.3 ft)
Bucket Capacity (Std.)	0.20 – 0.47 m³ (0.26 – 0.61 cu yd)	0.20 – 0.47 m³ (0.26 – 0.61 cu yd)
Breakout Force (Bucket)	~67 kN (15,060 lbf)	~68 kN (15,285 lbf)
Breakout Force (Arm)	~45 kN (10,115 lbf)	~46 kN (10,340 lbf)

📌 6. Speed & Mobility

Specification	Detail
Travel Speed (High)	4.7 km/h (2.9 mph)
Travel Speed (Low)	2.9 km/h (1.8 mph)
Swing Speed	~10 rpm
Max Gradeability	70% (35°)
Max Trench Crossing	2,100 mm (6.9 ft)
Max Step Height	700 mm (2.3 ft)

📌 7. Cab & Operator Comfort

Feature	Detail
Cab Type	ROPS/FOPS certified, fully enclosed, pressurized
Seat	Suspension seat with armrests, adjustable
Air Conditioning	Standard (heating + cooling)
Display	7-inch LCD multi-function monitor (ZX120-6)
Controls	Joystick-type levers with auto-idle
Noise Level	~67 dB(A) (ZX120-6)
Visibility	Large front/rear/side windows, rear-view camera (optional)
Bluetooth/USB	Available on ZX120-6

✅ The ZX120-6 cab features improved sound insulation and a wider panoramic view for better operator comfort during long working hours.

📌 8. Key Technologies (ZX120-6 Highlights)

Technology	Description
🔧 Hi-EPS II	Intelligent engine-pump matching system for fuel savings
🔧 Eco Mode	Three-mode selection (Power / Eco / Smart) to optimize fuel use
🔧 Hitachi Insight (Telematics)	Remote machine monitoring, fuel tracking, maintenance alerts via cloud
🔧 Auto Idle Shut-off	Engine automatically stops after 5 min of inactivity
🔧 Auto Swing Stop	Automatically stops swing when levers are neutral
🔧 Dozer Blade Control	Electric dozer blade with 6-way adjustment from cab
🔧 Quick Coupler Ready	Hydraulic quick coupler compatible (no tools needed)
🔧 LED Work Lights	Bright LED lights for night operation

📌 9. Attachment Compatibility

The ZX120 is highly versatile with a wide range of attachments:

Attachment	Use Case
🪣 Standard Bucket	General digging
🔨 Hydraulic Breaker (Hammer)	Demolition, rock breaking
🪓 Hydraulic Grapple	Log handling, scrap metal
🔧 Thumb	Pipe handling, material gripping
🔩 Auger	Post hole drilling, piling
🧹 Hydraulic Sweeper	Road cleaning
🪤 Rake	Landscaping, grading
🏗️ Tiltrotator	360° attachment rotation
🔌 Compactor Plate	Soil compaction

📌 10. Maintenance & Serviceability

Feature	Detail
Service Intervals	Engine oil: 500 hrs / Hydraulic oil: 2,000 hrs
Ground-Level Service Points	Fuel filter, oil filter, drain plugs accessible from ground
Hood Design	Tilt-up hood for easy engine access
Radiator	Large-capacity, side-access for cleaning
Track Adjustment	Tool-free track tension adjustment
Greasing Points	Centralized auto-lube system (available)

📌 11. Comparison with Competitors

Model	Weight	Power	Max Depth	Price Range (USD)
Hitachi ZX120-6	12,100 kg	100 hp	5,740 mm	$115,000 – $140,000
CAT 312 GC	12,300 kg	97 hp	5,750 mm	$118,000 – $145,000
Komatsu PC128US-11	12,600 kg	98 hp	5,800 mm	$120,000 – $148,000
Kobelco SK120-6	12,100 kg	98 hp	5,650 mm	$112,000 – $135,000
Doosan DX140LCR-5	14,000 kg	99 hp	5,800 mm	$125,000 – $150,000

✅ The ZX120-6 is competitive in fuel efficiency, operator comfort, and resale value.

📌 12. Pros & Cons

✅ Pros


🟢	Excellent fuel efficiency (Hi-EPS II)
🟢	Zero tail swing — great for urban work
🟢	Spacious, comfortable cab with great visibility
🟢	Strong breakout force for its class
🟢	High resale value & strong dealer network
🟢	Reliable Isuzu engine with low maintenance cost
🟢	Telematics-ready (Hitachi Insight)

❌ Cons


🔴	Slightly higher purchase price than some Korean brands
🔴	Limited counterweight compared to larger machines
🔴	Track shoes can be expensive to replace
🔴	Auxiliary flow may be limited for heavy attachments

📌 13. Summary

Parameter	Rating (out of 5)
Power & Performance	⭐⭐⭐⭐
Fuel Efficiency	⭐⭐⭐⭐⭐
Operator Comfort	⭐⭐⭐⭐⭐
Versatility	⭐⭐⭐⭐⭐
Durability & Reliability	⭐⭐⭐⭐⭐
Value for Money	⭐⭐⭐⭐

🎯 Bottom Line: The Hitachi ZX120-6 is one of the best 12-ton mini excavators on the market, offering an outstanding balance of power, efficiency, comfort, and versatility. It's an excellent choice for contractors working in urban environments, utilities, landscaping, and light construction where space is limited but performance matters.

Would you like me to go deeper into any specific aspect — such as pricing in a specific region, comparison with a particular model, or attachment recommendations? 🚜