This comprehensive Komatsu D20A, P, S, Q-6 and D21A, P, S, Q-6 Dozer Bulldozer Service Repair Manual provides detailed instructions and diagrams for maintenance and repair procedures. Covering models with serial numbers 60001 and up, this manual is your essential resource for keeping your Komatsu Dozer operating at peak performance. You'll find detailed information on a wide range of systems, including the engine, power train, undercarriage, hydraulic system, work equipment, and electrical system. The manual is designed for users of all skill levels, with easy-to-follow, step-by-step instructions and clear illustrations to guide you through every repair process. This manual offers a wealth of knowledge and practical guidance, saving you time and money by empowering you to tackle repairs and maintenance with confidence.

The Komatsu D20A, D20P, D20S, D20Q, D21A, D21P, D21S, and D21Q crawler dozers are renowned for their robust construction and reliable performance in various demanding applications. These machines are equipped with powerful diesel engines, providing ample horsepower for efficient earthmoving tasks. Their robust undercarriage features durable tracks and rollers, ensuring excellent traction and maneuverability in diverse terrain conditions. The operator's cab offers a comfortable and ergonomic workspace, enhancing productivity and operator comfort. The service repair manual, covering models with serial numbers 60001 and up, serves as a comprehensive guide for maintaining and repairing these dozers. It provides detailed information on the machine's components, systems, and procedures, enabling technicians and operators to perform routine maintenance, diagnose issues, and effectively address repairs. The D20 and D21 series dozers are versatile machines suited for a wide range of applications, including land clearing, road construction, site preparation, and material handling. Their powerful hydraulic system facilitates effortless blade operation, enabling efficient pushing, ripping, and grading tasks. These dozers feature a durable blade design, capable of handling heavy loads and challenging terrain. The D20A series features a standard blade configuration, while the D20P series is equipped with a semi-U blade for enhanced digging performance. The D20S and D20Q models come with a straight blade and a U blade, respectively, for specific applications. The D21A, D21P, D21S, and D21Q models share similar blade configurations, offering flexibility and adaptability to meet diverse job requirements. The D20 and D21 series crawler dozers are valuable assets in various industries, renowned for their reliability, durability, and efficiency. Their comprehensive service repair manual ensures optimal performance and longevity throughout their service life.