All-Inclusive Factory Service Technical manual for Hitachi Crawler Excavators Models UH123.

This manuals will assist you in diagnosing, analyses, testing, repair, and operating for your crawler excavator.
You can use a Windows, Mac, or Android device to view this manuals. You only need to have a PDF reader installed.

Covered Models:
   UH123

The manual comprises 2 documents, including the Service Manual, and Operators Manual

1. Service Manual (km07902)
Format: PDF, 801 pages
Language: English
Table of Contents:
   HOW TO USE
      Section & Group Contents
      Introduction
      Features of This Manual
      Safety Informations
   SPECIFICATIONS
      General Specifications
      Components
      Oil Specifications
      Torque References
      Conversion Table
   GENERAL
      Introduction
      Construction
      Hydraulic System
      Circuits
   SUPERSTRUCTURE
      Construction
      Engine
      Main Pump
      Pilot Pump
      Pump Transmission
      Control System
      Swing Device
      Main Frame & Counterweight
      Tanks & Filters
      Operator's Cab
      Valves
   UNDERCARRIGE
      Construction
      Track Link
      Front Idler
      Track Spring & Track Adjuster
      Upper Roller & Lower Roller
      Center Joint
      Travel Device
      Track Frame
      Swing Bearing
   FRONT-END ATTACHMENTS
      Construction
      Front Pipings
      Cylinder
      Boom, Arm, Bucket
      Pin & Bushing
   HYDRAULIC SYSTEM
      Outline
      Single Operation Modes
      Combined Operation Modes
      Schematic Diagram
   PNEUMATIC SYSTEM
      Outline
      Specifications
      Construction & Function
      Removal & Installation
      Disassembly & Assembly
   ELECTRICAL SYSTEM
      Safety Precautions
      Specifications
      Circuit Operations
      Monitoring & Alarming System
   TROUBLESHOOTING
      Troubleshooting Introduction
      Operational Checkout Procedure
      Diagnose Malfunctions
      Performance Stanard
      Hydraulic Components Performance Standards
   ALPHABETICAL INDEX

2. Operators Manual (em15612)
Format: PDF, 124 pages
Language: English
Table of Contents:
   CONTENTS OVERVIEW
   FRONT COVER
   TO THE READER
   TO THE OPERATOR
      SAFETY
      CONTROLS AND INSTRUMENTS
      PRESTART INSPECTION
      OPERATION
      BASIC MACHINE OPERATION
      TRANSPORTING
   TO THE MACHANIC
      SAFETY
      COMPONENTS LOCATIONS AND CIRCUITS
      MAINTENANCE
      STORAGE
      ASSEMBLY OF FRONT-END ATTACHMENT
      TROUBLESHOOTING
      SPECIFICATIONS