Used Komatsu 70-8Excavator

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📌 Overview

The Komatsu PC70-8 is a 7-ton class mini excavator and the 8th generation of Komatsu's popular PC70 series, introduced around 2015–2016 as a successor to the PC70-7. It is designed for versatility, fuel efficiency, and operator comfort, making it ideal for urban construction, utility work, landscaping, and confined-space operations.

🔧 Engine & Powertrain

Specification	Detail
Engine Model	Komatsu SAA4D107E-3
Type	4-cylinder, turbocharged, intercooled diesel
Displacement	3.318 liters
Power Output	49.9 kW (67.4 hp) @ 2,000 rpm
Emissions	EPA Tier 4 Final / EU Stage V
Fuel Tank Capacity	120 liters (31.7 US gal)
Cooling System	Water-cooled with thermostat

✅ The engine uses SCR (Selective Catalytic Reduction) technology with DEF (Diesel Exhaust Fluid) to meet strict emission standards without a DPF, reducing maintenance complexity.

& Physical Specifications

Specification	Detail
Operating Weight	~7,100 kg (15,653 lbs)
Overall Length	6,170 mm (20.24 ft)
Overall Width	2,280 mm (7.48 ft)
Overall Height	2,590 mm (8.50 ft)
Ground Clearance	370 mm (14.6 in)
Tail Swing Radius	1,120 mm (Zero Tail Swing / ZTS) ✅
Track Width Options	300 / 400 / 450 / 500 mm
Shoe Width	400 mm (standard)

💪 Hydraulic System

Specification	Detail
Pump Type	Variable displacement piston pump (2 pumps)
System Pressure	33.3 MPa (4,830 psi)
Flow Rate	2 × 66 L/min (total ~132 L/min)
Hydraulic Tank	56 liters (14.8 US gal)

🪣 Digging Performance

Performance	Metric	Imperial
Max Digging Depth	4,140 mm	13.58 ft
Max Digging Reach	6,400 mm	21.0 ft
Max Dump Height	4,540 mm	14.90 ft
Max Digging Force (Boom)	48.7 kN	10,948 lbf
Max Arm Crowd Force	33.5 kN	7,531 lbf
Bucket Capacity (Std.)	0.25 m³	0.33 cu yd
Min. Digging Depth	420 mm	1.38 ft

🎯 Key Features & Technology

🔹 1. Zero Tail Swing (ZTS) Design

The upper structure rotates within the track width, making it perfect for tight urban environments and working near buildings/walls.

🔹 2. KOMTRAX™ Telematics

Built-in GPS tracking for remote machine monitoring, fuel usage, maintenance alerts, and location tracking.

🔹 3. LCD Monitor

Large color display showing engine info, hydraulic data, camera feed, and working mode settings.

🔹 4. Comfortable Cab

Feature	Detail
Air Conditioning	✅ Full auto climate control
Heating	✅
Seat	Suspension seat with armrest
Noise Level	~68 dB(A) — very quiet for its class
ROPS/FOPS	✅ Certified cab

🔹 5. Quick Coupler (Hydraulic)

Standard on most configurations — allows tool-free attachment changes in seconds (bucket, breaker, auger, grapple, etc.)

🔹 6. Eco Mode / Power Mode

Two selectable working modes:
- 🟢 Eco Mode — saves fuel (~10–15% savings)
- 🔴 Power Mode — full performance for heavy digging

🔹 7. Pilot Control (Optional)

Can be equipped with joystick pilot controls instead of levers for smoother, more precise operation.

🔹 8. Rear Blade & Dozer Blade

Equipped with dozer blade (standard) and rear blade (optional) for grading and leveling.

🔩 Attachment Options (Hydraulic Quick Coupler)

Attachment	Application
🪣 Standard Bucket (250/300/400/500mm)	General digging
🔨 Hydraulic Breaker	Demolition, concrete breaking
🌀 Auger / Earth Drill	Post holes, piling
🧱 Grapple / Orange Peel	Scrap handling, demolition
🌲 Thumb / Clamp	Log handling, pipe gripping
🧹 Tiltrotator	Versatile attachment rotation
🧹 Hydraulic Shear	Metal cutting
🚜 4-in-1 Bucket	Dig, grade, clean, carry

📊 Performance Comparison (PC70-8 vs Competitors)

Spec	PC70-8 🇯🇵	Cat 307 E2 🇺🇸	JCB 8065 🇬🇧
Weight	7,100 kg	7,260 kg	6,680 kg
Engine Power	67.4 hp	67 hp	60 hp
Max Dig Depth	4.14 m	4.17 m	3.92 m
Tail Swing	ZTS ✅	Conventional ❌	Conventional ❌
Emissions	Tier 4 Final	Tier 4 Final	Stage V
Fuel Tank	120 L	130 L	105 L

🏆 The PC70-8 stands out with its Zero Tail Swing, fuel efficiency, and KOMTRAX integration.

🏗️ Typical Applications

Sector	Use Cases
🏙️ Urban Construction	Trench digging, utility installation, pipe laying
🏡 Residential	Foundation work, landscaping, pool excavation
🛣️ Road Work	Small trenching, manhole work, curb installation
🏭 Demolition	With hydraulic breaker or shear
🌳 Agriculture/Forestry	Land clearing, stump removal, drainage
⚡ Utility	Cable laying, sewer work

🔄 Generational History

Model	Years	Key Change
PC70-1	1983–1988	First generation
PC70-2	1988–1993	Engine upgrade
PC70-3	1993–1998	Improved cab
PC70-5	1998–2003	SAA6D102E engine
PC70-6	2003–2008	SAA4D95LE engine
PC70-7	2008–2015	SAA4D107E-1 engine
PC70-8	2015–Present	SAA4D107E-3, Tier 4 Final, ZTS, KOMTRAX ✅

💰 Approximate Pricing (2024 Estimate)

Configuration	Price Range (USD)
Cab + A/C + Dozer Blade (Standard)	$85,000 – $95,000
+ Pilot Controls	$95,000 – $105,000
+ Rubber Tracks (400mm)	$100,000 – $110,000
+ 2-Speed Travel	$105,000 – $115,000
Fully Loaded (all options)	$115,000 – $125,000

(Prices vary by region and dealer)

✅ Pros & ❌ Cons

✅ Pros	❌ Cons
Excellent fuel efficiency	Higher purchase price vs some competitors
Zero tail swing — great for tight spaces	No 2-speed travel on base model
Very quiet cab	Limited lift capacity vs larger mini excavators
KOMTRAX telematics standard	Rubber track option adds cost
Wide attachment compatibility	Service network varies by region
Low maintenance (no DPF)

🎯 Summary

Category	Rating
⭐ Overall	⭐⭐⭐⭐⭐ (4.8/5)
🔧 Reliability	⭐⭐⭐⭐⭐
💰 Value for Money	⭐⭐⭐⭐
🏠 Operator Comfort	⭐⭐⭐⭐⭐
🏙️ Urban Use	⭐⭐⭐⭐⭐
🔧 Serviceability	⭐⭐⭐⭐

🏅 The Komatsu PC70-8 is widely regarded as one of the BEST 7-ton mini excavators on the market, especially for contractors working in urban and confined-space environments. Its combination of ZTS design, fuel efficiency, low noise, and smart technology (KOMTRAX) makes it a top choice worldwide.

Would you like more details on any specific aspect — such as maintenance schedule, attachment recommendations, or comparison with a specific competitor? 🚜