The Komatsu D85C-21 (For -50°C SPECIFICATION) PIPELAYER Service Shop Repair Manual is a comprehensive guide for maintaining, assembling, disassembling, and servicing your Komatsu D85C-21 PIPELAYER. This manual covers a wide range of topics, including: * **General Information:** This section provides foundational information about the D85C-21 PIPELAYER, such as safety precautions, general specifications, and operating instructions. * **Structure and Function:** This section delves into the detailed design and operational principles of the D85C-21 PIPELAYER, providing a thorough understanding of each component and its function within the overall system. * **Testing and Adjusting:** This section guides you through various testing procedures and adjustments that ensure optimal performance and proper functionality of your D85C-21 PIPELAYER. It covers troubleshooting steps and diagnostic procedures to identify and resolve potential issues. * **Disassembly and Assembly:** This section provides step-by-step guidance on the disassembly and reassembly of various components of the D85C-21 PIPELAYER, detailing procedures, torque specifications, and proper sequence for each part. * **Maintenance Standard:** This section provides detailed information on the recommended maintenance schedule and procedures for the D85C-21 PIPELAYER. It includes lubrication points, filter replacement schedules, and other essential maintenance tasks to ensure the longevity and reliable operation of your equipment. This manual covers D85C-21 PIPELAYERS with serial numbers 36551 and up. It also includes the S6D125-2 engine specifications. For detailed engine information, please refer to the 125-2 Series Engine Shop Manual.

The Komatsu D85C-21 Pipelayer is a heavy-duty construction machine designed specifically for pipeline installation and related tasks. It is a versatile and powerful piece of equipment that can handle a wide range of applications, including laying large-diameter pipelines, trenching, backfilling, and general site preparation. The D85C-21 features a robust and reliable design, incorporating advanced engineering technologies to ensure high productivity and efficiency. The Pipelayer is equipped with a powerful diesel engine that provides ample power for even the most demanding pipeline projects. Its heavy-duty crawler undercarriage ensures excellent stability and traction, enabling it to operate on a variety of terrain types. The D85C-21 also features a sophisticated hydraulic system that delivers precise control and smooth operation, allowing for accurate pipeline placement. The Komatsu D85C-21 is a highly specialized machine designed to make pipeline installation a smooth and efficient process. It features an extended boom with a large lifting capacity, allowing for the precise placement of heavy pipeline sections. The boom design allows for a wide range of operating angles and reach, facilitating pipeline installation in challenging terrains and confined spaces. The D85C-21 is equipped with a variety of attachments that can be easily interchanged, including pipe-handling clamps, backfill blades, and trenching buckets. This versatility allows operators to perform multiple tasks with a single machine, streamlining operations and reducing downtime. The D85C-21 incorporates ergonomic design features to enhance operator comfort and control. The spacious cab provides a comfortable working environment with excellent visibility, allowing operators to maintain a high level of situational awareness and operate the machine safely and efficiently. The D85C-21 is also equipped with a comprehensive safety system that includes features such as a rollover protection structure (ROPS) and a falling object protection structure (FOPS). These safety features help protect the operator from potential hazards, ensuring a secure and reliable working environment.