1988-1991 Hitachi EX300, EX300LC, EX300H, EX300LCH Excavator Service Manual

Technical reference spanning EX300, EX300LC, EX300H, EX300LCH models: hydraulic system diagrams, engine specifications, and maintenance procedures. Part number: HU11-1A

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Hitachi Models Covered & Key Technical Specifications

In-Depth Engineering Installation Manual: Excavator Genuine Hitachi EX300, EX300LC, EX300H, EX300LCH Excavator Service Manual - Technical Manual (Operational Principle, Troubleshooting, Workshop Manual) 1988-1991 Procedure-Library Reference-Category: Excavator // Reference-Category: Excavator / Hydraulic System Logic // Model-Designation: Service Manual. System Cycle Rate: 1200 psi is set to 2000 psi for optimal system performance Mapping. Core Rotation Data: For complex operations, 40 kgf/cm² corresponds to the standard torque Benchmarks. Specific Installation Footprint: The counterweight requires 6200 kg for stability Configuration. Critical Threaded Fastener Data: For general assembly, 30 mm is the specified bolt size Baseline. Universal Alignment Specs: The swing device requires 362 kg, ensuring precise alignment Sequences. Technical Output Performance: 56.22 m² signifies the radiator surface area Configuration.

Technical Specifications
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Document Number / Seller:
31004 / Walter Thomas
File Size:
50.03 MB
File Type:
PDF
Language:
English
Pages:
1033
Printable:
Yes
Category:
Excavator
Last updated / verified
Dec 20, 2025

Hitachi Manual Features & Content Preview

In-Depth Engineering Installation Manual: Excavator Genuine Hitachi EX300, EX300LC, EX300H, EX300LCH Excavator Service Manual - Technical Manual (Operational Principle, Troubleshooting, Workshop Manual) 1988-1991 Procedure-Library

Reference-Category: Excavator // Reference-Category: Excavator / Hydraulic System Logic // Model-Designation: Service Manual.

TOP of description

Assessment-Element Operational-Logic Validation-Data
Group 1-Introduction 1988-1991 Coverage HU3-2-1~2
Group 2-Construction Component Overview GN11-1~2
Group 3-Hydraulic System Schematic Diagrams GN11-3-1~6
Group 4-Electric System Circuit Operations ES5-1~4
Group 5-Maintenance Interval Charts GN10-5-1~30

Systematizing the service groups into:

Timing procedures are documented for hydraulic system maintenance, including oil changes and filter replacements.

Technical notes are provided for engine specifications, covering detailed part numbers and troubleshooting.

Quality checks are addressed for the superstructure components, detailing assembly and disassembly procedures.

The [component] section documents the electrical system, outlining circuit operations and component identification.

The troubleshooting chapter addresses common issues, providing diagnostic flowcharts for efficient problem resolution.

This manual documents torque specifications for various components to ensure proper oscillation integrity.

Manual FAQ, Purchase & Download Details

Are detailed engine, transmission, and hydraulic system chapters included in this service manual? keyboard_arrow_down

Document covers major system components including the superstructure, undercarriage, engine, and hydraulic circuits in detail. The contents also provide grouping for electrical systems and specialized components like swing devices and travel motors.

Does the document contain structural construction information and exploded views for the excavator systems? keyboard_arrow_down

Yes, the manual features sections dedicated to construction, operational principles, and assembly details for major excavator assemblies and attachment points.

Can I find technical specification tables and torque reference charts within this document? keyboard_arrow_down

Manual includes dedicated specification sections that list component details and technical benchmarks. It further contains specific groups for torque references to support general assembly information.

Is there a section listing general fluid capacities or maintenance interval schedules? keyboard_arrow_down

Manual provides specification tables and group listings covering maintenance intervals, component specifications, and general machine dimensions.

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