Used Komatsu 450-8 Excavator

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Here is a detailed English introduction to the Komatsu PC450-8 hydraulic excavator, covering its key features, specifications, technologies, and applications.

Komatsu PC450-8 / PC450LC-8 Hydraulic Excavator – Overview

The Komatsu PC450-8 (including the long carriage variant PC450LC-8) is a 45-tonne class hydraulic excavator that belongs to Komatsu's highly regarded Dash 8 series. Designed for heavy-duty earthmoving, quarrying, construction, and mining support applications, this machine combines robust power with advanced fuel efficiency, operator comfort, and intelligent control systems. The PC450-8 delivers exceptional productivity, reliability, and low operating costs, making it a popular choice for large-scale projects requiring high breakout forces and sustained performance.

Engine and Emissions Compliance

At the heart of the PC450-8 is a Komatsu SAA6D125E-5 diesel engine. This is a water-cooled, 4-cycle, 6-cylinder, direct-injection, turbocharged and after-cooled power plant. It has a displacement of 11.04 liters and is engineered to meet EPA Tier 3 / EU Stage IIIA emissions regulations without compromising power output or fuel economy.

Net Power: 257 kW (345 HP) @ 1,900 rpm (SAE J1349)
Gross Power: 270 kW (362 HP) @ 1,900 rpm (ISO 14396)
Maximum Torque: Approximately 1,590 Nm @ 1,400 rpm

The engine features a high-pressure common-rail fuel injection system that optimizes combustion, reduces particulate matter, and lowers fuel consumption. An advanced electronic control system manages the engine and hydraulic system in an integrated manner, enabling multiple working modes and automatic idle shutdown to further reduce fuel burn and noise.

Hydraulic System and Performance

The PC450-8 is equipped with the HydrauMind (Hydraulic Mechanical Intelligence New Design) closed-center load-sensing hydraulic system. This system matches hydraulic flow to the exact demands of the work equipment, ensuring smooth, powerful, and efficient operation with minimal energy loss.

Main Pumps: Two variable-displacement axial piston pumps for implement, travel, and swing circuits.
Maximum Pump Flow: 2 x 361 L/min (2 x 95.4 US gpm)
Relief Valve Setting (Implement): 37.3 MPa (380 kgf/cm²)
Swing System: Independent axial piston motor with a swing holding brake, delivering a swing speed of 9.0 rpm.
Travel System: Two axial piston motors with counterbalance valves, providing two-speed travel with automatic shift.

The system incorporates boom and arm regeneration circuits, which recirculate oil to speed up cycle times and reduce hydraulic shock. Power modes (Power, Economy, Lifting, Breaker, and Attachment) allow the operator to tailor the machine's responsiveness and fuel consumption to the task at hand.

Key Performance Figures (Standard Configuration):

Bucket Breakout Force (ISO): 281 kN (28,600 kgf)
Arm Crowd Force (ISO): 226 kN (23,000 kgf)
Maximum Drawbar Pull: 378 kN (38,500 kgf)
Travel Speeds: 3.5 km/h (Low) / 5.5 km/h (High)
Gradeability: 70% (35°)

Operator Cab and Comfort

The PC450-8 features a spacious, ROPS (Roll-Over Protective Structure)-certified cab designed to reduce operator fatigue and enhance safety. The cab is mounted on viscous rubber dampers to suppress vibration and noise, with interior sound levels as low as 70 dB(A).

Multi-Function Color Monitor: A large, high-resolution 7-inch LCD panel provides real-time data on machine status, maintenance intervals, camera views, and Komtrax information. It supports 26 languages.
Ergonomic Controls: Low-effort PPC (Proportional Pressure Control) joysticks are integrated into adjustable armrests. A heated, air-suspension seat with lumbar support comes standard.
Climate Control: Automatic air conditioning with multi-directional vents ensures consistent comfort in extreme conditions.
Visibility: A narrow front cab pillar, large glass surfaces, and a standard rearview camera significantly improve all-around visibility, crucial for safety on busy job sites.

Maintenance, Durability, and Serviceability

Komatsu engineered the PC450-8 for extended service life and simplified daily maintenance, maximizing uptime.

EMMS (Equipment Management Monitoring System): Continuously monitors machine health, alerts the operator to abnormalities, and provides troubleshooting guidance.
Wide-Opening Service Doors: Side-by-side engine and cooling compartment doors grant easy ground-level access to filters, engine oil dipstick, coolant reservoir, and fuel/water separator.
Extended Service Intervals: Engine oil and filter changes at 500 hours, hydraulic oil at 5,000 hours, contributing to low long-term operating costs.
Heavy-Duty Undercarriage: The sealed and lubricated track chain, large-diameter track rollers, and induction-hardened sprockets are built for abrasive conditions. The standard track shoe width is 600 mm (optional 700/800 mm).
Reinforced Structures: The boom and arm are constructed from thick, high-tensile-strength steel plates with internal baffle plates and castings at stress points to resist torsional loads in tough digging and lifting applications.

Komtrax Remote Monitoring

A standard feature on the PC450-8, Komtrax is Komatsu's wireless machine monitoring system. It transmits data such as machine location, working hours, fuel consumption, load frequency, and maintenance alerts to a secure website. Fleet managers can access this data remotely to optimize machine utilization, prevent unauthorized use, plan maintenance, and reduce overall fleet operating costs.

Attachments and Configuration Options

The PC450-8 can be configured for a wide range of applications:

Boom and Arm Variations: Standard 7.06 m boom with a 3.38 m arm for general excavation; a mass excavation arm (2.6 m) for increased bucket capacity and breakout force; and a long-reach configuration for ditching and sloping.
Buckets: Heaped capacities range from 1.90 m³ to 2.66 m³, available in general-purpose, heavy-duty rock, and severe-duty configurations.
Counterweights: Standard 7,400 kg counterweight; an optional extra-heavy counterweight for enhanced stability when using heavy attachments.
Undercarriage: Standard (PC450-8) or Long Carriage (PC450LC-8) design. The LC variant offers greater fore/aft stability and increased lift capacity, ideal for heavy lifting and work on softer ground.

Key Specifications Summary (PC450LC-8)

Parameter	Specification
Operating Weight (approx.)	45,125 kg (99,480 lbs)
Engine Model	Komatsu SAA6D125E-5
Net Power	257 kW (345 HP) @ 1,900 rpm
Bucket Capacity (heaped)	1.90 – 2.66 m³ (2.49 – 3.48 yd³)
Maximum Digging Depth	7,790 mm (25’ 7”)
Maximum Reach Along Ground	11,900 mm (39’ 1”)
Maximum Dumping Height	7,570 mm (24’ 10”)
Bucket Breakout Force	281 kN (63,160 lbf)
Arm Crowd Force	226 kN (50,800 lbf)
Swing Speed	9.0 rpm
Travel Speed (High/Low)	5.5 / 3.5 km/h (3.4 / 2.2 mph)
Track Shoe Width (Standard)	600 mm (24”)
Tail Swing Radius	3,660 mm (12’ 0”)

The Komatsu PC450-8 remains a benchmark in the 45-ton excavator class, offering a proven balance of raw digging power, refined hydraulic control, superior fuel economy, and advanced diagnostic capabilities. It is engineered to deliver low cost per ton in the most demanding earthmoving and mining support operations.

Non flooded

No accident

Original product

Used Komatsu 450-8 Excavator

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