This comprehensive manual is a valuable resource for anyone working with Komatsu D85A-21, D85E-21, and D85P-21 bulldozers. It provides detailed information on maintaining, assembling, disassembling, and servicing these machines. The manual is split into two sections: a Service Repair Manual and an Operation & Maintenance Manual.

The Service Repair Manual provides thorough instructions and data for all aspects of the bulldozer. It includes detailed specifications, diagrams, and real-life photographs that guide users through every step of repair and maintenance procedures. This manual is a comprehensive guide to troubleshooting, repairing, and maintaining your Komatsu bulldozer.

The Operation & Maintenance Manual teaches effective, safe, and economical operation and maintenance techniques. It covers essential topics such as handling, lubrication, maintenance checks, adjustments, and troubleshooting. This section will improve your understanding of the machine and help you achieve peak performance.

The content of the manual includes detailed information on:

**Service Repair Manual Contents:**

* **General:** Overview of the bulldozer.
* **Engine:** Detailed information on the S6D125-1 and S6D125-2 engine, including service and repair procedures.
* **Power Train:** Instructions on the power train, including transmission, axles, and driveline components.
* **Undercarriage:** Detailed information on tracks, rollers, and other undercarriage components.
* **Hydraulic System:** Covers the operation, maintenance, and troubleshooting of the hydraulic system.
* **Work Equipment:** Detailed information on the blade, ripper, and other work equipment.
* **Electrical System:** Includes information on the electrical system, wiring diagrams, and troubleshooting techniques.
* **Others:** Covers additional components and systems.

**Operation & Maintenance Manual Contents:**

* **Foreword:** Introduces the manual and its purpose.
* **Safety Information:** Covers important safety precautions for operating and maintaining the bulldozer.
* **Introduction:** Overview of the bulldozer and its components.
* **Location of Plates:** Information on locating information plates and serial numbers.
* **Safety:** General safety precautions, operation safety, and maintenance safety information.
* **Operation:** Includes general overview, component explanations, operation instructions, transportation, cold weather operation, long-term storage, and troubleshooting procedures.
* **Maintenance:** Covers maintenance guides, service outlines, wear parts lists, lubricant and fluid recommendations, tightening torques, safety critical part replacement, maintenance schedules, and detailed service procedures.
* **Specifications:** Provides detailed specifications for the bulldozer.
* **Options and Attachments:** Covers optional equipment and attachments.
* **General Precautions:** Provides safety precautions for using optional equipment and attachments.
* **Using Seat Belt:** Instructions for using the seatbelt.
* **Handling Cap with Lock:** Instructions for handling the cap with lock.

This manual is a valuable resource for anyone involved in the operation and maintenance of Komatsu D85A-21, D85E-21, and D85P-21 bulldozers. It will help you keep your machine running smoothly and efficiently, ensuring its longevity and maximizing its performance.

The Komatsu D85A-21, D85E-21, and D85P-21 bulldozers are powerful and versatile machines designed for a wide range of heavy-duty construction and earthmoving applications. These models are known for their robust build, advanced technology, and exceptional performance in demanding environments. The D85A-21 is the standard model, while the D85E-21 features an electronically controlled transmission for enhanced efficiency and control. The D85P-21, on the other hand, is a specialized model specifically designed for mining operations, boasting a powerful engine, a heavy-duty undercarriage, and a wide blade for high-volume earthmoving.

All three models are equipped with Komatsu's renowned SAA6D140E-3 engine, delivering impressive power and torque. The D85A-21 and D85E-21 feature a standard hydrostatic transmission, offering smooth and responsive operation, while the D85P-21 is fitted with a powerful torque converter transmission, designed to handle heavy loads and challenging terrain. The operator cab provides a comfortable and ergonomic environment, equipped with intuitive controls, ample visibility, and advanced safety features. The D85A-21, D85E-21, and D85P-21 bulldozers also offer a selection of attachments, including rippers, winches, and specialized blades, further enhancing their versatility and adaptability to various jobsite requirements. Their robust construction and advanced technology make them ideal for projects ranging from large-scale infrastructure development to demanding mining operations.