コマツ（小松製作所） PC 300-7

The Komatsu PC300-7 is a well-recognized classic heavy-duty 30-ton excavator in the construction machinery industry. Renowned for its high horsepower, outstanding stability and exceptional durability, it has long served as the primary workhorse for heavy earthmoving and light mining projects. Powered by the original Komatsu SAA6D114E six-cylinder turbocharged direct-injection engine, the machine features abundant power reserve and strong explosive force, maintaining stable performance during long-duration, high-load continuous operations. Matched with Komatsu’s mature CLSS closed-center load-sensing hydraulic system, it delivers sensitive hydraulic response and smooth compound movements, achieving high working efficiency with excellent fuel economy and fully meeting the demands of high-intensity daily construction. Adopting mining-grade reinforced working devices and a heavy-duty stabilized undercarriage structure, the excavator boasts superior impact resistance and deformation resistance, enabling it to easily tackle harsh and complex working conditions such as rock handling, hard soil excavation and mine stripping. With a mature structural design, ultra-low failure rate and highly universal spare parts, it features simple daily maintenance, low long-term operating costs and high equipment attendance rate. Featuring a large bucket capacity, high working efficiency, excellent residual value and reliable performance, the Komatsu PC300-7 is widely applicable to large-scale earthwork excavation, mining and stone material operations, road infrastructure construction, site backfilling, river renovation and other heavy-duty projects. It stands out as the most cost-effective, fast-return and most reliable heavy-duty core machine among 30-ton used excavators.