This comprehensive Komatsu PC400-6, PC400LC-6, PC450-6, and PC450LC-6 Hydraulic Excavator Workshop Service Repair Manual is an invaluable resource for both experienced mechanics and DIY enthusiasts. It provides detailed instructions and illustrations for servicing and repairing these powerful machines, covering every aspect from basic maintenance to complex repairs. The manual is specifically designed for models with serial numbers starting from 32001 for the PC400-6 and PC400LC-6, and 12001 for the PC450-6 and PC450LC-6. It includes detailed information on the SA6D125-2 engine, which powers these excavators. The manual is organized in a clear and logical manner, with sections dedicated to general information, structure and function, testing and adjusting procedures, disassembly and assembly instructions, maintenance standards, and other essential information. With its wealth of detailed illustrations and step-by-step instructions, this manual empowers you to confidently tackle any repair or service task.

The Komatsu PC400-6, PC400LC-6, PC450-6, and PC450LC-6 are heavy-duty hydraulic excavators renowned for their power, efficiency, and durability. These models, manufactured by the Japanese multinational corporation Komatsu, are widely used in construction, mining, and other heavy industries. The core difference between the "PC" and "PCL" models lies in their configurations: the "PC" models are standard excavators featuring a conventional boom and stick, while the "LC" models offer a long reach configuration designed for specific tasks where extended reach is crucial. Both the PC400 and PC450 series share many components and systems, but they differ in their operational capacity and engine power. These excavators are meticulously engineered for demanding applications, incorporating a robust frame, powerful engine, and advanced hydraulic system. The hydraulic system is crucial for powering the excavator's movements, including rotation, boom, stick, and bucket operations. The PC400-6 series is equipped with a Komatsu SAA6D107E-1 engine, while the PC450-6 series employs a larger SAA6D114E-1 engine, both providing ample power for heavy lifting and digging. The advanced control systems ensure precise operation, while the ergonomic operator cab provides optimal comfort and visibility. These powerful machines are designed for maximum productivity and efficiency, boasting a high level of fuel efficiency and low maintenance costs, making them a reliable choice for a wide range of heavy-duty applications.