Komatsu WA320-3 Avance Wheel Loader Shop Manual

Komatsu WA320-3 Avance Wheel Loader Service Documentation

• Covers the 2003–2006 Komatsu WA320-3 Avance wheel loader, including 50001 and up serial number range configuration details.
• Official Komatsu publication S/N U41903, 1997 print date, providing technical structure and operational logic for the Avance series.
• Contains 47 detailed hydraulic system, power train, transmission, and differential schematics, alongside 15 comprehensive torque specification tables.
• Accessible from your device as soon as the order is placed.
• OCR text layer lets you jump to a torque spec by keyword.
• Stored against your account so you can retrieve it after a hard-drive loss.
• This 800-page shop manual provides the primary factory data used for technical assessment of the S6D108 engine drivetrain and articulated steering systems.

Technical Walkthrough and Component Data

This manual provides detailed documentation for the maintenance and structural analysis of the Komatsu WA320-3 Avance platform. The content covers the power train system, torque converter, transmission architecture, and differential operation for both earlier and later production serial numbers. Detailed descriptions of hydraulic control valves, including the transmission control valve, modulation valve, priority valve, and orbit-roll steering valve, are presented through exploded diagrams and operational flow descriptions. Technical chapters explain the transmission hydraulic circuit, gear shift logic, and the mechanics of the torque proportioning differential assembly.

System Identification and Reference Values

Specifications documented in this manual offer critical identification for service-floor assessment and maintenance. The Komatsu S6D108 engine assembly is identified as a 6-cylinder, 7.15 L water-cooled unit with turbocharging. Standard bolt torque values for the 102 series engine components are categorized by thread diameter, ranging from 10 Nm for 6 mm bolts to 77 Nm for 12 mm bolts. The transmission hydraulic circuit operates at a relief pressure of 20.59 MPa (210 kg/cm2). The fuel tank capacity for the WA320-3 is 221 liters. The steering orbit-roll valve and associated priority valve systems are described with specific attention to pressure regulation and flow distribution. Understanding how factory workshop documentation is structured assists technicians in locating relevant chapter information quickly. An official 800-page Komatsu OEM shop manual documenting the WA320-3 Avance wheel loader, covering engine, transmission, steering, and hydraulic specifications for the 50001 and up serial range.

Document Reference: SEBM006006 / U41903, 1997 Edition