1988-1994 Komatsu WA300-1, WA320-1 Wheel Loader Shop Manual

Technical reference for WA300-1 and WA320-1 wheel loaders, covering structure, function, testing, adjusting, and disassembly. Includes essential procedures and diagrams. PN 05-88(03)05251

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Document Details

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Document Number / Seller:
25663 / Mary Robinson
File Size:
90.93 MB
File Type:
PDF
Language:
English
Pages:
841
Printable:
Yes
Category:
Wheel Loader
Last updated / verified
Dec 29, 2025

Models Covered & Key Technical Specifications

Systematic Factory Reference Manual: Wheel Loader Detailed Komatsu WA300-1 and WA320-1 Wheel Loader Shop Manual - Structure and Function, Testing and Adjusting, and Disassembly and Assembly Reference 1988-1994 Calibration-Manual

Maintenance-Category: Manuals // Service-Level: Heavy Equipment / Power Train Logic // Technical-Domain: 1988-1994 Models.

  • System Power Rating: 143 HP signifies the peak engine output Specification.
  • Maximum Unit Dimensions: For optimal maneuverability, 7,045 mm defines the overall length Measurement.
  • Measured Bolt Torques: To ensure structural integrity, 115 N-m is specified for critical fasteners.
  • Technical Interference Fit: The mounting requires 2.3 m³ capacity for the bucket.
  • System Power Draw: Approximately 450 W indicates the typical electrical load.
  • Authorized Thermal Rating: For sustained operation, 80°C defines the maximum ambient temperature limit.

Professional Workshop Service Manual & Technical Specifications

Systematic Factory Reference Manual: Wheel Loader Detailed Komatsu WA300-1 and WA320-1 Wheel Loader Shop Manual - Structure and Function, Testing and Adjusting, and Disassembly and Assembly Reference 1988-1994 Calibration-Manual

Maintenance-Category: Manuals // Service-Level: Heavy Equipment / Power Train Logic // Technical-Domain: 1988-1994 Models.

Technical Specs Table Identifier Parameters Calibration-Spec
Model WA300-1 WA320-1
Years Covered 1988-1994 1988-1994
Document Type Shop Manual Shop Manual

TOC Summary Block Technical chapters are organized around:

  • Power Train: Structure and Function
  • Engine: Testing and Adjusting
  • General: Weight Table
  • Power Train: Hydraulic Circuit Schematics
  • Steering System: Maintenance Standard

This manual details the internal workings and repair procedures for the Komatsu WA300-1 and WA320-1 wheel loaders from the 1988-1994 model years. It serves as a comprehensive guide for technicians and owners.

Brake system specifications are included for complete system analysis and repair.

The document thoroughly covers the structure, function, testing, adjusting, and disassembly of the various systems, including the engine, power train, steering, and work equipment. It provides detailed diagrams and procedural information.

Safety procedures are documented for every stage of maintenance and repair.

The manual also includes information on fluid capacities, required tools, and other technical data essential for proper upkeep. The goal is to provide a complete reference for maintaining these machines.

Fluid capacities are listed for all major components.

Accurately mandating procedures ensures the longevity and optimal performance of the wheel loader. The precise information contained within helps to minimize downtime and maintain operational efficiency.

Tool requirements are listed for specific maintenance tasks.

This workshop manual meticulously documents torque specifications for engine and transmission components to ensure proper thread engagement security.

FAQ

Assess the **critical** calibration settings for optimal engine performance. keyboard_arrow_down

3.5 - 5.5 kg/cm² is the standard value for engine oil pressure at high idling, with a permissible value range of 2.5 kg/cm².

What components **required** clearance measurements are essential for proper assembly? keyboard_arrow_down

A feeler gauge (Part Number: 795-125-1330) is required for measuring valve clearance, with specific procedures detailed for intake and exhaust valves.

Confirm the **specified** torque specifications for critical engine components. keyboard_arrow_down

57 kg is the cylinder head assembly weight, and its mounting bolts require a torque of 0.9±0.1 kgm for proper installation. This specification is found on page 770 of the document.

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Reviews (3)

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This manual is incredibly detailed and user-friendly. The troubleshooting section helped me resolve an issue quickly!
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Rated 5 out of 5 stars
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The layout is clear, making it easy to navigate. Support was quick to respond with my download link, which was a breeze!