Used Komatsu 450-8 Excavator

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Komatsu PC450-8 Crawler Excavator Detailed Introduction

The Komatsu PC450-8 is a 45-ton-class heavy-duty crawler excavator developed and manufactured by global leading construction equipment provider Komatsu Ltd. Tailored for high-load harsh working scenarios, it balances high productivity, low operation cost, extreme durability and environmental performance, making it one of the most popular large excavator models for mining, heavy infrastructure and large-scale earthmoving projects worldwide.

Key Specifications

Item	Parameter
Operating Weight	44,200 – 45,800 kg
Engine Model	Komatsu SAA6D125E-5, 6-cylinder, turbocharged, aftercooled diesel engine
Rated Net Power	257 kW (345 HP) @ 1,900 rpm
Emission Standard	Tier 3 / EU Stage IIIA / China Stage III
Standard Bucket Capacity	1.9 – 2.7 m³ (customizable for special working conditions)
Max. Digging Depth (standard arm)	7,890 mm
Max. Digging Reach (standard arm)	12,040 mm
Max. Dumping Height (standard arm)	7,620 mm
Travel Speed (High/Low)	5.5 km/h / 3.2 km/h
Swing Speed	8.5 rpm
Gradeability	70% (35°)
Hydraulic System Pressure	34.3 MPa

Core Performance Features

1. High-Efficiency Powertrain

The PC450-8 is equipped with Komatsu’s self-developed SAA6D125E-5 engine, integrated with high-pressure common rail fuel injection technology and cooled exhaust gas recirculation (EGR) system, which ensures sufficient power output while optimizing fuel combustion efficiency. It provides 3 optional working modes for different scenarios:

Power (P) Mode: Delivers maximum power output for heavy-load operations including rock excavation, mining and high-efficiency earthmoving.
Economy (E) Mode: Reduces fuel consumption by 10~15% with no obvious productivity loss for light to medium load works.
Lifting (L) Mode: Provides stable low-speed hydraulic output to ensure safety for heavy lifting operations.The standard auto idle and auto deceleration function automatically lowers engine speed when the machine idles for more than 4 seconds, further cutting fuel use and operation noise.

2. Advanced Hydraulic System

The model adopts Komatsu’s proprietary HydrauMind closed-center load-sensing hydraulic system (CLSS), which precisely matches hydraulic flow output with actual operation demands, ensuring smooth and coordinated compound actions (e.g. simultaneous boom lifting, arm retracting and swing). Pressure compensation valves installed on each actuator eliminate speed deviation caused by load changes, greatly improving operation precision.

Structural Durability

Komatsu optimizes the PC450-8’s structure for harsh working conditions such as mines and quarries:

The boom and arm are made of high-tensile strength steel, with reinforced plates added at high-stress points verified by finite element analysis, effectively resisting bending and cracking under long-term heavy load impacts.
The heavy-duty undercarriage adopts reinforced track frames, induction-hardened track links, large-diameter carrier rollers and high-torque travel motors, which can withstand strong impacts from uneven terrain and extend the walking system’s service life.
The standard bucket is made of abrasion-resistant Hardox steel, with replaceable cutting edges and high-strength bucket teeth, suitable for excavation of abrasive materials including rock, ore and hard soil.
All key structural components have passed 10,000 hours of extreme condition durability tests, ensuring reliable operation under long-term high-load working conditions.

Operator Comfort & Safety

The PC450-8 is fitted with a ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure) certified cab, providing all-round safety protection:

The cab is installed on viscous damping mounts, which reduce vibration transmitted to the cab by over 60%, and internal operation noise is controlled at only 72 dB(A), creating a quiet working environment.
The fully adjustable air-suspension seat with lumbar support effectively reduces operator fatigue during long shifts.
Low-effort pilot-operated joysticks with short stroke provide precise control, suitable for long-time operation.
The 7-inch high-definition color monitor displays real-time operating data, fault codes and maintenance reminders, and supports rear-view camera input to eliminate reversing blind spots.
Standard safety configurations include hydraulic lock (prevents actuator misoperation), travel alarm, reverse buzzer and emergency stop button.

Maintenance & Management Convenience

All routine maintenance points (engine oil filter, fuel filter, air filter, hydraulic oil level gauge, main grease points) are arranged at ground-accessible positions, so maintenance personnel can complete daily inspection and servicing without climbing on the machine.
Extended service intervals: engine oil change every 500 operating hours, hydraulic oil and filter change every 5,000 operating hours, greatly reducing downtime and maintenance cost.
The standard KOMTRAX telematics system allows fleet managers to remotely monitor the excavator’s real-time location, operating hours, fuel consumption, fault alerts and maintenance schedule via web or mobile terminals, helping optimize fleet management.

Typical Applications

The Komatsu PC450-8 is widely used in the following scenarios:

Mining and quarry operations: ore excavation, overburden stripping and material loading
Large infrastructure construction: highway, railway, dam, airport and port construction
Large-scale earthmoving projects: land reclamation, site leveling and deep foundation excavation
Heavy demolition works: demolition of large buildings and concrete structures
Bulk material handling: loading and stacking of bulk cargo in ports, stockyards and coal mines

With outstanding power performance, excellent structural durability and low operating cost, the Komatsu PC450-8 has gained wide recognition from global users, and has extremely high residual value in the second-hand equipment market.

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Original product

Used Komatsu 450-8 Excavator

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