Komatsu PC228USLC-1, PC228US-2 Excavator Shop Manual (P/N SEBM015903)

• Covers Komatsu PC228USLC-1, PC228US-2, and PC228USLC-2 hydraulic excavators for serial numbers 11001 and up, as well as 15001 and up
• Official Komatsu publication SEBM015903, printed May 2003
• Contains 661 pages of structural, hydraulic, electrical, and functional reference data
• Primary factory reference for S6D102E-1 engine integration and associated hydraulic systems across the listed configurations

Component and System Documentation

This factory manual maps out the core systems of the PC228USLC-1 and PC228US-2. It breaks down the power train, engine, and drive mechanisms. You get structural and functional overviews, followed by exact factory standards for testing, adjusting, and troubleshooting hydraulic circuits, swing machinery, and control valves.

Servicing heavy excavators involves extreme hydraulic pressures. Always review the included factory safety guidelines before beginning any teardown or diagnostic work. Beyond safety protocols, the manual outlines detailed disassembly and assembly procedures. It provides clear judgment standards for parts inspection. You will also find comprehensive electrical circuit diagrams and hydraulic piping schematics tied directly to the machine monitoring system.

Specifications and Reference Values

Accurate torque and pressure settings are critical for field mechanics. The text documents factory torque values for standard bolts, flared nuts, split flange bolts, and O-ring boss joints. It also lists exact fluid capacities for all major assemblies.

Specific technical data points are included throughout the chapters. For instance, the hydraulic system table specifies a boom cylinder internal diameter of 120 mm. The hydraulic tank capacity is rated at 260 liters. Additionally, the swing motor relief valve set pressure is fixed at 27.9 MPa.