1999-2002 Hitachi EX40U, EX50U Excavator Technical Manual

This 1999-2002 Hitachi EX40U, EX50U technical manual covers component layouts, hydraulic circuits, and troubleshooting procedures. Ref: 585T-1-1

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Document Details

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Document Number / Seller:
29594 / Jennifer Owens
File Size:
29.75 MB
File Type:
ZIP
Language:
English
Pages:
456
Printable:
Yes
Category:
Mini Excavator
Last updated / verified
Dec 30, 2025

Models Covered & Key Technical Specifications

Hitachi EX40u, EX50u Excavator Technical Manual: 1999-2002 Documentation-Set

Covers component layouts, hydraulic circuits, and troubleshooting procedures. Ref: 585T-1-1 | Hitachi Excavators Volume

  • Document Specifications: 456 pages establishes the detailed technical information coverage.
  • Technical Data Catalog: For comprehensive system overviews, 29.748 MB defines the data file size Framework.
  • Engine Information: The ISUZU 4LE1 engine requires 25.0 kW/1900 min-1 (34 PS/1900 rpm) for standard operation Logic.
  • System Pressure Baseline: Primary Pilot Pressure is calibrated to 40±5 kgf/cm2 Benchmarks.
  • Operational Standards: Secondary Pilot Pressure provides 30±5 kgf/cm2 Range.
  • Component Testing: Main Relief Valve Set Pressure determines 260±10 kgf/cm2 Baseline.

Professional Workshop Service Manual & Technical Specifications

Hitachi EX40u, EX50u Excavator Technical Manual: 1999-2002 Documentation-Set

Equipment-Series: EX40u/EX50u // System-Identifier: Hitachi Excavators/Hydraulic System Logic // Conceptual-Layout: Technical Manual

Maintenance hierarchies are structured into sections covering General Information, Component Operation, Operational Performance Test, Troubleshooting, and Schematics.

Component Operation Overview

This manual documents the operation of various machine systems including the hydraulic circuit, pump device, swing device, control valve, pilot valve, travel device, and solenoid valves. Detailed diagrams illustrate the function and components of each system.

Specifications and Performance Standards

The document includes detailed specifications and performance standards for both the EX40u and EX50u models, covering engine speed, compression pressure, valve clearance, injection timing, travel speed, swing speed, and cylinder cycle times.

Troubleshooting Guidance

A comprehensive troubleshooting section provides systematic procedures for diagnosing and resolving issues related to the engine, electrical system, and various machine functions.

The manual documents torque specifications for various components to ensure proper assembly and function.

FAQ

Check the **standard** specifications for the EX40u model? keyboard_arrow_down

2030±50 min-1 is the maximum engine speed for the EX40u model.

What does the **necessary** engine compression pressure specification? keyboard_arrow_down

31 kgf/cm2 or more is the minimum engine compression pressure required for proper engine operation.

Reference the **recommended** travel speed standards for the EX40u Type A? keyboard_arrow_down

17.5±1.5 sec/20 m for Fast Speed Mode (Rubber Crawler) and 28.0±1.5 sec/20 m for Slow Speed Mode (Rubber Crawler) are the recommended travel speed standards.

What are the **calibrated** hydraulic cylinder cycle time standards for the Boom Raise? keyboard_arrow_down

2.0±0.3 sec is the calibrated cycle time standard for the Boom Raise operation.

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The manual is comprehensive and easy to navigate. It saved me a lot of time during repairs!
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This manual covers everything you need to know. I received prompt assistance when I had questions about the download. Smooth experience!
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Great details on specifications and troubleshooting. The download link was sent to my email almost instantly!