1988 Hitachi EX225USR & EX225USR-LC Excavator Service Manual

Hitachi EX225USR and EX225USR-LC excavator service manual covering operational principles and systems, including electrical and hydraulic circuits, component functions, and specifications. Ref: KM-193E

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Document Details

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Document Number / Seller:
31054 / Robert Robinson
File Size:
21.67 MB
File Type:
PDF
Language:
English
Pages:
542
Printable:
Yes
Category:
Excavator
Last updated / verified
Dec 27, 2025

Models Covered & Key Technical Specifications

1988 Hitachi EX225USR & EX225USR-LC Service Manual

Technical Manual for Operational Principle

Hitachi EX225USR & EX225USR-LC | Component Operation & Systems Directory. Unit

  • Design Data: 2.91 m is the specified arm length for optimal reach. Matrix.
  • Advanced Weight Data: 21700 kg is the standard operating weight for the EX225USR model. Standards.
  • Technical Capacity Limits: 0.8 m³ defines the bucket capacity (heaped) for the EX225USR. Margin.
  • Standard Output Density: 107 kW is the rated engine output under HP Mode. Protocol.
  • Prescribed Energy Draw: The engine speed is limited to 2150 rpm for maximum performance. Architecture.
  • Engine Specifications: ISUZU A-6BG1T is the direct injection engine model utilized. Norms.

Professional Workshop Service Manual & Technical Specifications

Hitachi EX225USR & EX225USR-LC Hydraulic Excavator Service Manual: Diagnostics & Maintenance (1988) Service-Portfolio

Maintenance-Category: System Overviews // Application-Range: Hydraulic & Electrical Systems // Specification-Class: Component Functionality.

Specification Rating Architecture
Engine Model ISUZU A-6BG1T Diesel, 4 cycle, 6-cylinder
Rated Output 99.3 kW / 1950 min⁻¹ Horsepower Mode: 106.6 kW / 2150 min⁻¹
Operating Weight 21700 kg (EX225USR) Base Machine Dry Weight: 17600 kg (EX225USR)
Arm Length 2.91 m (9 ft 7 in) Bucket Capacity (Heaped): 0.8 m³ (EX225USR)
Ground Pressure 48 kPa (EX225USR) Swing Speed: 13.9 min⁻¹ (rpm)

The service manual covers the hydraulic and electrical systems, detailing component operations, and providing essential maintenance information. It outlines the system's logic and function, including control systems, hydraulic circuits, and electrical equipment.

Inspection guidelines are provided for hydraulic and electrical system components, ensuring proper function and longevity.

Alignment specifications are included for major hydraulic components to maintain optimal performance and efficiency.

Reference data is included for engine specifications, operating ranges, and dimensions for transportation.

This manual covers system operation, including the main circuit, pilot circuit, and neutral circuit descriptions.

Diagnostic procedures are covered for electrical systems, including power circuits, preheat circuits, and starting circuits.

This document details torque specifications for various components to ensure proper joint separation prevention. The service manual covers system operations, hydraulic circuits, and electrical component functionalities.

FAQ

What does the **exact** assembly sequence for the swing motor entail? keyboard_arrow_down

19 components are listed for the swing motor assembly, including swash-plate type and fixed-displacement plunger motor parts.

Reference the **specific** service interval parameters for the hydraulic oil filter. keyboard_arrow_down

Full-flow paper element type with bypass function is used for the oil filter, requiring regular maintenance as per the schedule outlined.

What are the **designated** system architecture for the travel device? keyboard_arrow_down

3540 mm is the minimum swing radius specified for the EX225USR and EX225USR-LC models, indicating the machine's turning capabilities.

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Reviews (5)

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The manual is incredibly detailed and has all the necessary diagrams. It made troubleshooting my excavator a breeze.
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This manual covers everything I needed for my EX225USR. The illustrations are particularly helpful!
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I had a smooth experience downloading the manual, and the support team was very responsive when I had questions. Highly recommend!
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Rated 5 out of 5 stars
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Received the download link quickly via email. The guide is thorough and has simplified my maintenance process significantly.