Komatsu PC75UU-3 Mini Excavator Shop Manual

Komatsu PC75UU-3 Technical Service Overview

• Covers 2003 Komatsu PC75UU-3 mini excavators with serial numbers 15001 and up, including cab and canopy variants.
• Official Komatsu publication P/N SEBM016404, dated July 2003.
• Contains 620 pages of detailed technical system information, performance specifications, and component structure diagrams.
• Features extensive system-level documentation for the hydraulic pump, control valve, and engine-related interfaces.
• Includes detailed exploded-view diagrams for hydraulic cylinders, swing machinery, and undercarriage components.
• Indexed PDF search covers every chapter and appendix for rapid component identification.
• Your order stays downloadable from your account for life.
• This manual documents the specific engineering differences between the 4D102-1 and 4D95LE-2 engine applications and their respective hydraulic integration.

Structural and Functional Documentation

This 2003 Komatsu PC75UU-3 workshop manual provides a technical look into the structural design and operational logic of the mini excavator. It covers fundamental mechanical systems, detailing the power train layout, swing machinery, and undercarriage configuration. The content serves as a reference for understanding how the machine operates, covering the hydraulic equipment layout, including the pump control systems, PPC valves, and solenoid-actuated functions. The text clearly defines the architecture of the Closed center Load Sensing System (CLSS), providing insight into pressure compensation, travel junction circuits, and the role of the self-pressure reducing valve in maintaining machine efficiency.

Engineering Specifications and Reference Data

Technical data previews include comprehensive weight tables for major assemblies, such as the revolving frame, counterweight, and boom components. The document lists precise fluid capacities for the engine oil pan, hydraulic system, and cooling system, alongside detailed charts for ambient temperature and lubricant requirements. Cylinder specifications for the boom, arm, and bucket are documented, including bore diameters, stroke lengths, and pin-to-pin distances. Hydraulic performance values, such as pump discharge volumes (155+52 l/min) and setting pressures for work equipment, swing, and travel circuits (25.5 MPa), are explicitly provided to support technical review. Reference only — always consult a certified technician before performing service on this equipment. This official 620-page Komatsu shop manual is the primary reference for the PC75UU-3 mini excavator, documenting structure, functional operation, and technical specifications for the 15001 and up serial number range.

Document Reference: SEBM016404, dated July 2003