Hitachi EX120 Workshop Manual manuals in PDF

Hitachi EX120 Workshop Manual

The Hitachi EX120 Workshop Manual is an essential resource for technicians, mechanics, and owners responsible for the maintenance and repair of Hitachi EX120 excavators. This factory service repair manual, formatted in PDF, spans 984 pages and provides comprehensive coverage with detailed illustrations, step-by-step instructions, and intricate diagrams. It includes essential information for the removal, installation, assembly, disassembly, service, inspection, repair, troubleshooting, and tune-ups of the EX120 model. Written in English, the manual is fully searchable and includes bookmarks for easy navigation, as well as comprehensive wiring and hydraulic diagrams to support complex repair tasks.

Model Covered

• Hitachi EX120

Contents Overview

How to Use

• Section & Group Contents: An organized breakdown of the manual’s sections and groups.
• Introduction: Introductory information on how to handle and use the manual effectively.
• Symbols: Explanation of symbols used throughout the manual.

Features of This Manual

• Construction, Tab, Page, Contents: Detailed information on the layout and structure of the manual.
• Safety Information: Essential safety guidelines for operating and servicing the excavator.

Specification

• General Specifications: Detailed specifications including dimensions, weights, ground pressures, capabilities, backhoe attachments, other attachments, working ranges, and lifting capacities.
• Components Specifications: In-depth specifications for various components such as the engine, main pump, pilot pump, control valve, swing motor, travel motor, center joint, pilot valves, control neutralizer valve, shockless valve, accumulator, hydraulic tank, suction filter, full-flow filter, air breather, bypass check valve, pilot filter, oil cooler, restriction valve, solenoid valve, mode selection cylinder, boom cylinder, arm cylinder, and bucket cylinder.
• Torque Reference: Essential torque values for various components.
• Others: Maintenance intervals and conversion tables.

General

• Introduction: Basic information on the EX120 model.
• Construction: Details on the construction of the excavator.
• Hydraulic System: Overview of the hydraulic system, including main and pilot hydraulic circuits.

Electric System

• Main Circuit, Control System, Monitor System: Detailed information on the electric systems, including wiring diagrams and control systems.

Maintenance

• Removal & Installation: Step-by-step instructions for removing and installing various components.
• Maintenance: General maintenance guidelines and procedures.
• Name Plate: Information on the name plate for identification purposes.

Superstructure

• Main Frame & Counter-Weight, Engine, Hydraulic Oil Tank, Fuel Tank, Swing Device, Electrical Parts, Cab Heater, Engine Control Lever, Main Piping, Oil Cooler Piping, Cover, Pump Device, Control Box, Cab Group, Pilot Piping, Control Lever: Detailed descriptions and servicing instructions for each part of the superstructure.

Hydraulic Pump Device

• O/P, Hydraulic Pump, D/A, Main Pump: Detailed information on the hydraulic pump and main pump, including disassembly and assembly instructions.

Control Valve

• O/P, CV-22M Control Valve, D/A, CV-22M Control Valve: Comprehensive servicing instructions for the control valve.

Swing Device

• O/P, Swing Motor, D/A, Swing Motor, D/A, Swing Reduction Device: Detailed maintenance procedures for the swing device components.

Pilot Valve

• O/P, Pilot Valve, D/A, HV Type Pilot Valve (Front-End Attachment), D/A, HV Type Pilot Valve (Travel): Detailed servicing instructions for pilot valves.

Control Neutralizer Valve

• O/P, Control Neutralizer Valve, D/A, Disassembly & Assembly: Instructions for the control neutralizer valve.

Shockless Valve

• O/P, Shockless Valve, D/A, Shockless Valve: Maintenance and servicing instructions for the shockless valve.

Accumulator

• O/P, Accumulator: Detailed servicing information for the accumulator.

Solenoid Valve

• O/P, Solenoid Valve, D/A, Solenoid Valve: Comprehensive instructions for the solenoid valve.

This workshop manual is an invaluable resource for ensuring the proper maintenance and optimal performance of Hitachi EX120 excavators. It provides all the necessary information and detailed instructions to perform routine maintenance, complex repairs, and thorough troubleshooting. Whether you are a professional technician or an equipment owner, this manual is designed to make the repair and maintenance process straightforward and effective, helping to extend the life and enhance the performance of your Hitachi EX120 excavator.