The Hitachi EX120-5 Excavator Service Repair Manual is a comprehensive guide for maintaining and repairing your Hitachi EX120-5 Excavator. Designed for both DIY enthusiasts and experienced mechanics, the manual provides detailed instructions and illustrations to ensure accurate and efficient repairs. It covers all aspects of the excavator, from the engine and undercarriage to the upperstructure and front attachment.

This manual is divided into three volumes:

**Technical Manual (Operation Principle):** This section provides a detailed explanation of the excavator's operating principles, offering insights into how each system works.

**Technical Manual (Troubleshooting):** A comprehensive troubleshooting guide helps you diagnose and resolve potential problems.

**Workshop Manual:** This volume offers step-by-step instructions for dismantling, assembling, and repairing each component of the excavator.

**Circuit Diagram:** This section includes detailed electrical diagrams and wiring schematics to aid in understanding and repairing the electrical system.

The manual covers a wide range of topics, including:

* **Introduction:** Provides an overview of the Hitachi EX120-5 Excavator.
* **General Information:** Includes essential information about the excavator, such as specifications, maintenance schedules, and safety precautions.
* **Upperstructure:** Covers the cab, hydraulic system, and other components located in the upper structure.
* **Undercarriage:** Details the tracks, bogies, and other components of the undercarriage.
* **Front Attachment:** Provides information about the various attachments, including the bucket, hydraulic breaker, and other tools.
* **Engine and Accessory:** Explains the engine system, including the fuel system, cooling system, and other auxiliary components.

With its comprehensive coverage, detailed illustrations, and easy-to-follow instructions, this manual empowers you to confidently handle repairs and maintenance on your Hitachi EX120-5 Excavator, saving you time and money.

The Hitachi EX120-5 Excavator is a powerful and versatile machine designed for a wide range of construction and earthmoving applications. This model is a popular choice for contractors and operators seeking a reliable and efficient excavator in the 12-ton class. The EX120-5 is renowned for its robust build quality, advanced hydraulic system, and operator-friendly design. Powered by a durable and fuel-efficient engine, the excavator offers impressive digging force and lifting capacity, enabling it to tackle demanding tasks with ease. Its spacious and ergonomic cab provides excellent visibility and control, enhancing operator comfort and productivity. The EX120-5 is equipped with a variety of features that contribute to its efficiency and safety, including an automatic lubrication system, a responsive control system, and a comprehensive safety system.

The Hitachi EX120-5 Excavator is highly adaptable, making it suitable for a variety of tasks. Its versatility is further enhanced by the availability of a wide range of attachments, including breakers, grapples, and buckets. Whether you are excavating trenches, loading trucks, or demolishing structures, the EX120-5 is a dependable and efficient choice. Its robust design and advanced features ensure long-lasting performance and minimal downtime, making it a valuable asset for any construction project. The EX120-5 also prioritizes operator safety with features like a rollover protection system (ROPS) and falling object protection system (FOPS). This commitment to safety and reliability has solidified the Hitachi EX120-5's reputation as a top-performing excavator in the industry.