Used Komatsu 120-8Excavator

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📌 Overview

The Komatsu PC120-8 is a 12-ton (12,000 kg) class midi excavator belonging to Komatsu's -8 generation series. It is designed for versatile performance in construction, utility, landscaping, road work, and general earthmoving applications. The "-8" indicates it is the 8th generation of this machine platform, featuring significant improvements in fuel efficiency, operator comfort, and technology integration over its predecessors (PC120-7, PC120-6, etc.).

& Technical Specifications

Parameter	Details
Model	PC120-8
Operating Weight	~11,900 – 12,300 kg (26,200 – 27,100 lbs)
Engine Model	Komatsu SAA4D107E-3
Engine Type	4-cylinder, turbocharged, intercooled diesel
Displacement	3.76 L
Rated Power	71.5 kW (96 HP) @ 2,000 rpm
Max Torque	~369 N·m @ 1,400 rpm
Emission Standard	EPA Tier 4 Final / EU Stage V (varies by region)
Fuel Tank Capacity	~250 L (66 US gal)
Hydraulic System	Load-sensing, variable displacement pump
Travel Speed (H/L)	5.0 / 3.4 km/h (3.1 / 2.1 mph)
Ground Pressure	~43 kPa (6.2 psi)
Swing Speed	~11.5 rpm
Swing Torque	Reduced swing option available

🔧 Dimensions

Dimension	Measurement
Transport Length	~7,470 mm (24.5 ft)
Transport Width	~2,490 mm (8.2 ft)
Transport Height	~2,960 mm (9.7 ft)
Track Width	500 / 600 / 700 mm (adjustable)
Undercarriage Length	~2,820 mm
Tail Swing Radius	~2,430 mm

🏗️ Working Range & Performance

Parameter	Value
Max Digging Depth	~5,640 mm (18.5 ft)
Max Reach (Ground Level)	~8,520 mm (28.0 ft)
Max Digging Height	~8,190 mm (26.9 ft)
Max Dump Height	~5,830 mm (19.1 ft)
Max Vertical Wall Dig	~4,320 mm (14.2 ft)
Bucket Capacity (Std)	0.34 – 0.54 m³ (0.44 – 0.71 yd³)
Boom Stick Options	2-piece boom, 3-piece boom
Breakout Force (Boom)	~75 kN (16,860 lbf)
Breakout Force (Arm)	~53 kN (11,915 lbf)

🧠 Key Features & Technology

1. KOMTRAX 📡

Telematics system for remote machine monitoring, diagnostics, location tracking, and maintenance alerts.

2. Intelligent Machine Control (iMC) Ready 🎯

Pre-wired for 2D/3D GPS grading, boom/bucket guidance, and auto-grade systems.
Reduces operator skill dependency and improves accuracy.

3. ECO Mode 🌿

Automatically optimizes engine speed and hydraulic flow to reduce fuel consumption by up to 10-15% during light-load operations.

4. Auto Idle Stop 💤

Engine automatically shuts off after 5 seconds of inactivity, saving fuel and reducing noise/emissions.

5. Advanced Hydraulic System 💧

Load-sensing + EPOS (Electronic Power Optimized System) for smooth, precise operation and energy efficiency.

6. Comfortable & Spacious Cab 🪑

Feature	Detail
Air Suspension Seat	Yes, adjustable
Climate Control	Full AC/Heater
Joystick Controls	Electro-hydraulic with auto-return
Monitor	7-inch LCD multi-function display
Noise Level	~68 dB(A) (one of the quietest in class)
ROPS/FOPS	Certified
Visibility	Excellent all-around with large glass area

🔩 Attachments & Options

Attachment	Application
🔨 Hydraulic Breaker (Hammer)	Rock breaking, demolition
🪓 Hydraulic Grapple	Material handling, scrap
' Hydraulic Shear/Crusher	Demolition, recycling
🪣 Thumb	Pipe, log, material handling
🪚 Ripper (Single Shank)	Hard ground, frozen soil
🕳️ Auger/Drill	Piling, foundation work
🧹 Bucket (various sizes)	Digging, grading, trenching
🛡️ Dozer Blade	Grading, pushing, leveling
🔄 Quick Coupler	Fast attachment change
📏 2-Speed Travel	High speed / High torque modes
🔋 Reduced Tail Swing	Tighter workspace in urban areas

🆚 Comparison: PC120-8 vs Predecessors

Feature	PC120-7	PC120-8
Engine Power	71 kW (95 HP)	71.5 kW (96 HP)
Fuel Efficiency	Baseline	~10% better
Emission Standard	Tier 3	Tier 4 Final / Stage V
Cab Comfort	Good	Significantly improved
Technology	Basic	iMC ready, KOMTRAX, ECO mode
Noise Level	~72 dB	~68 dB
Operating Weight	~12,000 kg	~12,100 kg

✅ Advantages

✅	Description
🥇	Fuel efficient — ECO mode + auto idle saves significant costs
🥈	Low noise & emissions — Ideal for urban/residential areas
🥉	Excellent visibility — Large cab glass, flat hood design
🏅	Technology-ready — iMC, KOMTRAX, 2D/3D grading capable
🏅	Versatile — Wide range of attachments for any job
🏅	Reliable — Komatsu's proven SAA4D107E engine
🏅	Low operating cost — Easy maintenance, long service intervals
🏅	Compact size — Fits through standard gates, works in tight spaces

📊 Typical Applications

🏗️ Construction	🌳 Landscaping	🛣️ Road Work	🏚️ Demolition
Foundation excavation	Tree planting	Trenching	Breaking concrete
Pipe laying	Grading	Utility work	Material sorting
Backfilling	Pond digging	Road repair	Site cleanup

💰 Approximate Pricing (2024 Estimates)

Configuration	Price Range (USD)
New Machine (Basic)	$110,000 – $130,000
New Machine (Full Options)	$140,000 – $165,000
Used (2015-2020, ~5,000 hrs)	$65,000 – $95,000
Used (2020+, ~2,000 hrs)	$95,000 – $125,000

Prices vary significantly by region, dealer, condition, and configuration.

🏆 Summary


Class	12-ton Midi Excavator
Best For	General construction, utility, landscaping, light demolition
Strengths	Fuel efficiency, low noise, technology, comfort, versatility
Komatsu's Position	One of the best-selling midi excavators globally

The Komatsu PC120-8 is widely regarded as one of the top midi excavators in its class, offering an excellent balance of power, efficiency, comfort, and technology. It's a go-to machine for contractors who need a reliable, versatile, and cost-effective 12-ton excavator. 💪🚜