This comprehensive workshop repair service manual provides in-depth technical information for the Komatsu D31E-20 Bulldozer, covering all model years. It serves as an indispensable resource for technicians, mechanics, and operators seeking detailed guidance on service, maintenance, and troubleshooting procedures. The manual encompasses a wide range of topics, including engine specifications, hydraulic systems, transmission components, electrical diagrams, and detailed instructions for dismantling, assembling, and repairing various parts and subsystems. With clear illustrations, step-by-step instructions, and comprehensive troubleshooting charts, this manual empowers users to perform repairs and maintenance effectively and efficiently.

The Komatsu D31E-20 is a powerful and versatile crawler-type dozer designed for demanding construction and earthmoving tasks. It boasts a robust and reliable design, making it a popular choice for a wide range of applications, from heavy-duty site preparation and excavation to material handling and road building. The D31E-20 is powered by a fuel-efficient and powerful Komatsu SAA6D107E-2 engine, delivering ample torque and horsepower for efficient operation. This engine features a direct-injection system and a turbocharger for optimal performance and fuel economy. The D31E-20's hydrostatic transmission system provides smooth and responsive power delivery, allowing operators to smoothly maneuver the dozer and maintain precise control even in challenging conditions. The Komatsu D31E-20 is equipped with a durable and efficient undercarriage system, featuring heavy-duty track chains and rollers designed for long life and superior performance. The operator's cab is designed with ergonomics and comfort in mind, offering excellent visibility and a well-organized control layout for intuitive operation. Features such as a spacious and adjustable seat, air conditioning, and sound suppression contribute to a comfortable working environment. The D31E-20 is renowned for its reliability and durability, making it a valuable asset for contractors and construction companies seeking a rugged and dependable machine capable of handling demanding workloads. Its advanced technology, user-friendly controls, and robust construction ensure consistent performance and efficiency on a variety of projects.