Used Komatsu 400-7Excavator

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📌 Overview

Item	Detail
Manufacturer	Komatsu Ltd. (Japan)
Model	PC400-7
Generation	7th Generation (-7 Series)
Class	Medium / Large (~40-ton class)
Production Period	~2014 – Present
Emissions Standard	Tier 4 Final (EPA) / Stage IIIB (EU)

The PC400-7 is Komatsu's advanced 40-tonne class hydraulic excavator, representing a major leap from the previous PC400-8. It was designed with a focus on fuel efficiency, operator comfort, smart technology, and lower operating costs.

🔧 1. Engine Specifications

Parameter	Specification
Engine Model	Komatsu SAA6D125E-5
Type	6-cylinder, in-line, turbocharged & aftercooled diesel
Displacement	11.98 L (11,980 cc)
Rated Power	218 kW (292 HP) @ 1,800 rpm
Max Torque	~1,150 N·m @ 1,400 rpm
Emissions	DPF + SCR (Selective Catalytic Reduction) system
Fuel Tank Capacity	~620 L (164 US gal)

✅ The engine uses Common Rail injection and EGR + DPF + SCR aftertreatment to meet Tier 4 Final without compromising performance.

⚖️ 2. Operating Weight & Dimensions

Parameter	Value
Operating Weight	38,500 – 41,000 kg (varies by configuration)
Transport Length	~10,490 mm (34 ft 5 in)
Transport Width	3,190 mm (10 ft 6 in)
Transport Height	3,310 mm (10 ft 10 in)
Ground Clearance	~460 mm
Track Width	600 mm (standard) / 700 mm (wide)
Track Shoe Width	600 mm

🪣 3. Work Range & Performance

Parameter	Value
Bucket Capacity (Standard)	1.5 – 2.0 m³ (2.0 – 2.6 yd³)
Max Digging Depth	~6,700 mm (22 ft)
Max Reach (Ground Level)	~10,600 mm (34 ft 9 in)
Max Digging Height	~10,300 mm (33 ft 10 in)
Max Dumping Height	~7,200 mm (23 ft 7 in)
Max Digging Force (Boom)	~182 kN (40,900 lbf)
Max Digging Force (Arm)	~130 kN (29,200 lbf)
Swing Speed	~7.5 rpm
Travel Speed	5.2 km/h (3.2 mph)
Gradeability	70% (35°)

🛢️ 4. Hydraulic System

Parameter	Specification
Main Pump Type	Variable displacement axial piston pump × 2
Total Pump Flow	~2 × 294 L/min (65 imp gal/min)
System Pressure	35 MPa (5,075 psi)
Swing Motor	Axial piston motor
Travel Motor	Axial piston motor × 2
Hydraulic Tank	~150 L

🔄 The load-sensing hydraulic system automatically adjusts flow and pressure based on demand, saving fuel during light work.

💺 5. Cab & Operator Comfort (Key -7 Features)

The PC400-7 introduced significant cab improvements over the -8:

Feature	Description
💺 Air Suspension Seat	Fully adjustable with lumbar support
🖥️ Large Color LCD Monitor	10.4-inch touchscreen with rear-view camera
❄️ Auto Climate Control	Dual-zone air conditioning
🔇 Noise Level	~72 dB(A) — one of the quietest in class
📶 KOMTRAX Ready	Remote machine monitoring & diagnostics
🎛️ Auto Idle Shutdown	Engine auto-stops after 5 min idle
🔑 Keyless Start	Smart key system
🛡️ ROPS/FOPS	Certified rollover & falling object protection
💡 LED Work Lights	Enhanced night visibility

🧠 6. Smart Technology & Eco Features

Technology	Benefit
🌱 ECO Mode	Optimizes engine & hydraulic output — saves up to 15% fuel vs. -8
📊 KOMTRAX	Real-time fleet management, fuel tracking, maintenance alerts
🎯 Auto Swing Stop	Automatic swing deceleration near work area
🛠️ Self-Diagnosis	Built-in fault code system for quick troubleshooting
🔄 Auto Engine Speed Control	Matches engine RPM to hydraulic demand
📈 KOMAX	Optional advanced machine control (GPS-grade ready)

🔩 7. Maintenance & Serviceability

Feature	Detail
Ground-level service points	Easy daily checks without climbing
Extended service intervals	Engine oil change: every 500 hrs / 1,000 hrs (Ultra-Spec)
Fuel filter with water separator	Easy-access, long-life
Centralized grease points	Quick lubrication from ground level
Large-opening engine hood	Easy access to all components
Boom/Arm foot inspections	Quick-release pins for easy inspection

🏗️ 8. Typical Applications

Application	Suitability
✅ General earthmoving	Excellent
✅ Mining & quarrying	Very Good (with HD undercarriage)
✅ Road construction	Excellent
✅ Demolition	Good (with hydraulic breaker)
✅ Pipeline work	Very Good
✅ Large-scale excavation	Excellent
✅ Material handling	Good (with grapple/magnet)

📊 9. PC400-7 vs PC400-8 Comparison

Feature	PC400-7	PC400-8
Fuel Efficiency	⬆️ Up to 15% better	Baseline
Cab Comfort	⬆️ Significantly improved	Good
Emissions	Tier 4 Final	Tier 3
Weight	Slightly lighter	Slightly heavier
Hydraulics	Load-sensing, smarter	Conventional
Technology	KOMTRAX, ECO mode, auto-idle	Basic monitoring
Noise	~72 dB	~75 dB

💰 10. Approximate Pricing (2024 Estimate)

Configuration	Price Range (USD)
New Machine (Standard)	$320,000 – $400,000
Used (2015-2018, 5,000-8,000 hrs)	$180,000 – $260,000
Long Reach / HD Config	$400,000 – $480,000+

(Prices vary significantly by region, dealer, and configuration)

⭐ Summary — Why the PC400-7 Stands Out

✅ Strength	Description
🔋 Fuel Efficiency	Best-in-class for 40-ton excavators
🧘 Operator Comfort	Air-suspended cab, quiet, spacious
🤖 Smart Tech	KOMTRAX, ECO mode, auto-idle
🔧 Low Maintenance	Extended intervals, easy access
🌍 Emissions Compliant	Tier 4 Final / Stage IIIB ready
💪 Powerful & Reliable	292 HP, proven Komatsu engineering

The Komatsu PC400-7 is widely regarded as one of the best 40-ton class excavators on the market — offering the perfect balance of power, efficiency, comfort, and technology. It's a top choice for contractors, mining companies, and large-scale construction firms worldwide. 🏗️🚜