Komatsu PC228USLC-1, PC228US-2 Excavator Shop Manual

Technical Scope and Coverage

• Covers Komatsu PC228USLC-1, PC228US-2, and PC228USLC-2 hydraulic excavators in the 11001 and up and 15001 and up serial number ranges
• Official Komatsu publication SEBM015903, printed May 2003
• Contains 661 pages of structural, functional, testing, and assembly technical information
• Indexed PDF search covers every chapter and appendix
• Accessible from your device as soon as the order is placed
• This 2003 edition is the primary factory reference for the S6D102E-1 series engine integration and associated hydraulic systems across the listed US/USLC configurations

Component and System Documentation

This factory manual provides an expert overview of the PC228USLC-1 and PC228US-2 excavator systems. The content is organized by functional area, beginning with comprehensive structural and functional descriptions of the power train, including the engine and drive systems. The documentation continues through testing, adjusting, and troubleshooting procedures for the hydraulic circuits, swing machinery, and control valves.

Additional sections detail disassembly and assembly procedures, alongside judgment standards for parts inspection within the maintenance section. The document provides detailed hydraulic piping drawings, electrical circuit diagrams, and machine monitoring system information for these specific Komatsu models.

Specifications and Reference Values

Technical highlights include system-wide pressure settings, torque specifications, and fluid capacities for major assemblies. The manual documents torque values for standard bolts, flared nuts, split flange bolts, and O-ring boss joints.

Cylinder internal diameter for the boom is listed at 120 mm in the hydraulic system table. Hydraulic tank capacity is documented at 260 liters for these configurations. Swing motor relief valve set pressure is specified at 27.9 MPa in the motor assembly section. This 661-page Komatsu OEM workshop manual provides detailed structural, hydraulic, and electrical specifications for the 2003-era PC228USLC-1 and PC228US-2 excavator models.