コマツ（小松製作所） 450

Komatsu PC450-8 is a 45-ton heavy-duty crawler excavator engineered exclusively for heavy-load working conditions such as mining and large-scale infrastructure construction. It is equipped with Komatsu's self-developed SAA6D125E-5 six-cylinder turbocharged engine with a displacement of 11.04L and a rated power of 257kW/1900rpm, and is fitted with a cooled EGR system to meet Tier 3/non-road National III emission standards, striking a perfect balance between powerful performance and fuel economy. The standard bucket capacity of the whole machine is 2.1m³, with a wide range of heavy-duty buckets of 1.3-2.8m³ optional. Boasting a bucket digging force of 278kN and an arm digging force of 233kN, it delivers outstanding operational efficiency. It adopts a load-sensing hydraulic system with a main pump maximum flow of 690L/min for precise and smooth hydraulic response, and is equipped with five working modes including P/E/L/B/ATT to match different operation scenarios on demand. The fuselage features a reinforced chassis and a heavy-duty boom & arm, with an optional variable gauge design (3580mm extended/3082mm retracted) and a ground contact pressure of 84.1Kpa. The operating weight of the whole machine is 45125kg and the travel speed is 3.0/5.5km/h, ensuring maximum operational stability and impact resistance. The cab adopts a ROPS safety protection design and is integrated with the Komatsu Komtrax remote monitoring system. Configurations such as high-performance filtration and high-pressure series filter elements greatly improve equipment reliability and maintenance convenience, effectively reducing failure rates and operating costs. It is a highly efficient and reliable choice for heavy earthmoving operations and mining construction.