Used Komatsu 400-7Excavator

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📌 Overview

The Komatsu PC400-7 is a mid-to-large size hydraulic excavator belonging to Komatsu's 7th Generation (Series 7) lineup. It was introduced as an upgrade to the PC400-6/PC400-8 series, offering improved fuel efficiency, advanced technology, and enhanced operator comfort. It is widely used in general construction, mining, road building, and heavy earthmoving operations.

🔧 Engine Specifications

Parameter	Details
Engine Model	Komatsu SAA6D107E-5
Type	6-cylinder, turbocharged, aftercooled diesel
Displacement	10.69 liters (652 cu in)
Rated Power	~203 kW (272 hp) @ 1,800 rpm
Emission Standard	EPA Tier 3 / EU Stage IIIA
Fuel Tank Capacity	~520 liters (137 gal)

✅ The SAA6D107E-5 engine is known for its fuel efficiency, durability, and lower emissions compared to previous generations.

⚖️ Weight & Dimensions

Parameter	Value
Operating Weight	39,000 – 40,900 kg (85,980 – 90,170 lbs)
Transport Length	~10,850 mm (35.6 ft)
Transport Width	~3,190 mm (10.5 ft)
Transport Height	~3,250 mm (10.7 ft)
Ground Clearance	~460 mm (18.1 in)
Track Width	600 mm (23.6 in) shoes

🪣 Bucket & Work Range

Parameter	Value
Standard Bucket Capacity	1.4 – 1.9 m³ (1.8 – 2.5 cu yd)
Max. Digging Depth	~6,550 – 6,870 mm (21.5 – 22.5 ft)
Max. Digging Reach	~9,960 mm (32.7 ft)
Max. Dumping Height	~7,050 mm (23.1 ft)
Max. Digging Force (Bucket)	~180 kN (40,470 lbf)
Max. Tractive Force	~179 kN (40,240 lbf)

🧠 Key Features & Technology (Series 7 Highlights)

1. Komatsu ESS (Excavator Smart System) 🖥️

Real-time monitoring of engine and hydraulic performance
Helps operators work more efficiently and reduces fuel consumption
Automatic idle speed control

2. Improved Hydraulic System 💧

KOMTRAX compatible – remote machine monitoring
Advanced load-sensing hydraulic system
Smooth, precise operation with reduced cycle times

3. Enhanced Cab Comfort 💺

Spacious, air-conditioned cab with low noise & vibration levels (~68 dB(A))
Adjustable suspension seat with armrests
Large LCD monitor with rear-view camera
Excellent all-round visibility

4. Fuel Efficiency ⛽

Up to 10-15% better fuel economy compared to PC400-6
Auto engine speed control
Eco-mode operation

5. Ease of Maintenance 🔧

Ground-level service points
Larger access panels
Extended service intervals (500-hour oil change)
Easy-to-reach filters and drain points

6. Durability & Strength 💪

Heavy-duty undercarriage with reinforced track frame
High-strength boom and arm (HSS steel)
Boom cylinder guard for extra protection
Working life designed for 10,000+ hours

📊 Performance Summary

Feature	Rating
🔋 Power	⭐⭐⭐⭐⭐ (272 hp – excellent for 40-ton class)
⛽ Fuel Efficiency	⭐⭐⭐⭐⭐ (Best-in-class for its size)
💺 Operator Comfort	⭐⭐⭐⭐⭐
🔧 Maintainability	⭐⭐⭐⭐⭐
🏗️ Versatility	⭐⭐⭐⭐⭐ (Multiple attachments available)
💰 Value for Money	⭐⭐⭐⭐

🔄 Available Configurations

Configuration	Description
Standard Boom	General purpose digging
Long Reach (LR)	For deep excavation & dredging
High Reach Demolition	For building demolition
Pipeline / Trenching	Narrow bucket, specialized setup
Forestry	With grapple or shear attachment

🌍 Applications

Industry	Use Cases
🏗️ Construction	Foundation work, road building, building demolition
& Mining & Quarrying	Rock excavation, loading trucks
🛣️ Infrastructure	Pipeline laying, trench digging
🌳 Forestry	Log handling, land clearing
🏭 Industrial	Material handling, dredging

🆚 Comparison: PC400-7 vs PC400-8

Feature	PC400-7	PC400-8
Generation	Series 7 (2012–2015)	Series 8 (2015+)
Engine	SAA6D107E-5	SAA6D107E-5 (updated)
Technology	ESS (basic)	ESS + Advanced KOMTRAX
Emissions	Tier 3	Tier 4 Final (in some markets)
Fuel Efficiency	Good	Better (+5-10%)
Cab	Good	Improved (more modern)

The PC400-8 is the direct successor with even more refinements, but the PC400-7 remains a very capable and popular machine in the used equipment market.

💰 Approximate Pricing (Used Market, 2024)

Condition	Price Range (USD)
Good condition (5,000–8,000 hrs)	$85,000 – $120,000
Excellent condition (<5,000 hrs)	$120,000 – $160,000
Heavy use (10,000+ hrs)	$60,000 – $85,000

(Prices vary by region, condition, and attachments)

✅ Summary


Machine	Komatsu PC400-7
Class	40-ton hydraulic excavator
Power	272 hp (203 kW)
Weight	~40,000 kg
Bucket	1.4–1.9 m³
Best For	Heavy construction, mining, general earthmoving
Strengths	Fuel efficiency, durability, comfort, low maintenance cost
Legacy	One of Komatsu's most successful mid-size excavators

The Komatsu PC400-7 is a reliable, powerful, and efficient excavator that has earned an excellent reputation worldwide. Whether new or used, it remains one of the top choices in the 40-ton class for contractors who need a machine that delivers performance, comfort, and low operating costs. 🚜💪