Used Komatsu 450-7 Excavator

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Komatsu PC450-7 Crawler Excavator Detailed Introduction

The Komatsu PC450-7 is a heavy-duty crawler excavator developed and produced by Komatsu Ltd., the world-leading Japanese construction and mining equipment manufacturer. As a core model in Komatsu’s 40-50 ton class excavator lineup, it is tailored for high-intensity, long-hour heavy-load operating scenarios, and is widely recognized in the global market for its outstanding reliability, fuel efficiency and adaptability to harsh working conditions.

1. Core Technical Specifications

Item	Parameter
Operating Weight	44,200 – 45,500 kg
Engine Model	Komatsu SAA6D125E-3 turbocharged, air-to-air intercooled diesel engine
Rated Power	257 kW / 345 HP @ 2000 rpm
Emission Standard	EU Stage II / U.S. EPA Tier 2
Bucket Capacity Range	1.9 – 2.7 m³ (customizable for special attachments)
Standard Arm Length	3.2 m
Max. Digging Depth	7,790 mm
Max. Digging Radius	11,140 mm
Max. Digging Height	10,920 mm
Bucket Digging Force	283 kN
Arm Digging Force	213 kN
Travel Speed	3.1 km/h (low) / 5.5 km/h (high)
Swing Speed	9 rpm
Fuel Tank Capacity	650 L
Hydraulic Oil Tank Capacity	246 L

2. Key Performance Advantages

2.1 High-efficiency Power & Hydraulic System

The independently developed Komatsu engine features strong low-end torque output, adapted to fluctuating load demands in mining and heavy construction sites.
Matched with Komatsu proprietary Closed-center Load Sensing System (CLSS), which adjusts hydraulic flow output in real time according to operation demands, reducing unnecessary energy loss, and improving fuel efficiency by 8-10% compared to the previous generation PC450-6.
Supports one-click switching between Power (P) mode for heavy-load excavation and Economy (E) mode for light earthmoving, balancing operation efficiency and fuel consumption.

2.2 Extreme Durability & Reliability

The boom, arm and main frame are all made of high-tensile strength steel, with reinforced rib design, which can resist impact and deformation under long-term hard rock excavation conditions.
The undercarriage adopts sealed and lubricated track links, thickened track shoes and high-wear-resistant supporting wheels, with a service life 30% longer than similar products of the same class, adapted to dusty, gravelly mining sites.
High-precision multi-stage filtration system for engine and hydraulic oil, effectively avoiding component wear caused by impurities, and extending the service life of core components.

2.3 Operator Comfort & Safety

The cab is ROPS/FOPS certified, effectively protecting operator safety in case of rollover or falling object impact.
Equipped with fully automatic air conditioning, vibration-damping suspended seat, and the indoor operating noise is controlled below 75 dB(A), reducing fatigue during long-hour operation.
Low-effort pilot control joysticks, large LCD monitoring panel that displays real-time equipment status, fault alarm and maintenance reminders, optional reversing camera for blind area elimination.

2.4 Intelligent Management

Standard equipped with Komatsu KOMTRAX remote monitoring system, supporting real-time positioning, operating hour statistics, fuel consumption monitoring and fault code remote query, which helps fleet managers arrange preventive maintenance and reduce unplanned downtime.

3. Main Application Scenarios

The PC450-7 can adapt to almost all heavy-duty operation scenarios, and can be matched with a variety of attachments (hydraulic breaker, ripper, grab, log grapple, etc.) to expand functions:

Open-pit mining and quarry aggregate loading
Large-scale foundation excavation for infrastructure projects (highways, railways, airports)
Port bulk cargo handling and stockpiling
Medium and large building demolition
River dredging and land reclamation projects

4. Maintenance Advantage

All daily maintenance points (oil filter, fuel filter, air filter, lubrication points) are arranged at ground-accessible positions, no need to climb to the upper frame for routine maintenance, saving maintenance time.
Long replacement cycle for consumables: 500 hours for engine oil, 5000 hours for hydraulic oil, reducing long-term operation cost.
Komatsu has a global after-sales service and spare parts supply network, with a very high market retention rate of PC450-7, and its second-hand residual value is far higher than similar products in the same class.

Note: Configuration parameters may vary slightly for different regional markets and customized orders. This model has been officially replaced by the PC450-8 series with higher emission standards, but it is still widely used in global construction and mining sites due to its low operation and maintenance cost.

Non flooded

No accident

Original product

Used Komatsu 450-7 Excavator

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