Hitachi EX40U EX50U Workshop Manual
The Hitachi EX40U EX50U Workshop Manual is a vital resource for technicians, mechanics, and owners of Hitachi EX40U and EX50U excavators. This factory technical manual and workshop manual, available in PDF format, provide extensive coverage of maintenance, repair, and troubleshooting procedures for these models. Spanning 467 pages, the manual includes numerous illustrations, step-by-step instructions, and detailed diagrams to assist with the removal, installation, assembly, disassembly, service, inspection, repair, troubleshooting, and tune-ups of the EX40U and EX50U excavators. Written in English, the manual is fully searchable and includes bookmarks for easy navigation. It also features comprehensive wiring and hydraulic diagrams to support complex repair tasks.
Models Covered
- Hitachi EX40U
- Hitachi EX50U
Contents Overview
Technical Manual
General
- Specification: Detailed specifications, working ranges, and machine dimensions for transportation.
- Engine Specification: Specific details about the engine used in these models.
- Component Layout: Layout of main components, electrical system, relays, monitors, and switches.
System
- Hydraulic System: Overview of the hydraulic system, including main and pilot circuits.
- Component Operation:
- Pump Device: Information on the main and pilot pumps.
- Swing Device: Details about the swing motor, parking brake changeover valve, valve unit, and swing reduction gear.
- Control Valve: Description of the hydraulic circuit, boom anti-drift valve, flow combiner valve, main relief valve, overload relief valve, and make-up valve.
- Pilot Valve: Operational details of the pilot valve.
- Travel Device: Information on the travel motor, travel brake valve, and travel reduction gear.
- Others (Upperstructure): Details about the solenoid valve.
- Others (Undercarriage): Information on the swing bearing, center joint, and track adjuster.
Operational Performance Test
- Introduction: Overview of performance tests and preparation procedures.
- Engine Test: Instructions for testing engine speed, compression pressure, valve clearance, nozzle check, and injection timing.
- Excavator Test: Procedures for testing travel speed, track revolution speed, mistrack, travel motor leakage, swing speed, swing function drift, swing motor leakage, maximum swingable slant angle, swing bearing play, hydraulic cylinder cycle time, dig function drift, control lever operating force, and control lever stroke.
- Component Test: Tests for primary and secondary pilot pressure, main relief valve set pressure, overload relief valve set pressure, pump driving torque, swing motor drainage, and travel motor drainage.
- Standard: Operational performance standards.
Troubleshooting
- Diagnosing Procedure: Introduction to diagnosing procedures and steps for effective troubleshooting.
- Troubleshooting A: Detailed troubleshooting procedures for engine system, actuator operating system, front attachment system, swing system, travel system, and blade system. Instructions on how to lower the boom when the engine stops.
- Troubleshooting B: Additional troubleshooting information and procedures.
Additional Features
- Searchable Content: The manual is fully searchable, allowing users to quickly locate specific information.
- Detailed Diagrams: Includes comprehensive wiring and hydraulic diagrams to support detailed maintenance and repair tasks.
- Bookmarks: Easy navigation through the manual with the help of bookmarks.
This workshop manual is an invaluable resource for ensuring the proper maintenance and optimal performance of Hitachi EX40U and EX50U 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 excavator.
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