2000 Komatsu PC128UU-1, PC128US-1 Shop Manual (P/N SEBM009805)

• Official 794-page OEM publication (P/N SEBM009805, printed in Japan, August 2000) detailing the 2000 Komatsu PC128UU-1 and PC128US-1 excavators
• Built for heavy equipment owners and professional workshops, providing complete system diagnostics, chassis, and electrical specifications
• Covers specific assembly data and maintenance clearance standards for the S4D102E-1 engine variant (applicable from production serial numbers 2347 and 1715 and up)
• Contains over 400 exploded-view diagrams, 15 detailed hydraulic circuit schematics, and 10+ standard torque specification tables for metric bolts and flared nuts

System Structure and Function

The 2000 Komatsu PC128UU-1 manual documents the internal architecture of major machine systems. This includes the radiator, oil cooler, power train, and swing circle assembly. You get a clear breakdown of the logic driving the closed-center load-sensing (CLSS) system. It details exactly how the variable displacement pump, PC valve, and LS valve interact during complex compound operations. Furthermore, the text traces the hydraulic flow through the control valve, isolating individual spool functions for the boom, arm, bucket, and offset movements.

Specification and Technical Data Preview

This publication outlines precise hydraulic pressure settings. You will find unload valve relief values at 2.45 MPa (25 kg/cm²) alongside main relief valve set pressures up to 34.8 MPa (355 kg/cm²). Maintenance data for the S4D102E-1 engine details fluid capacities and lubrication requirements tailored to various ambient temperatures. The engine oil pan capacity is rated at 13.5 liters. The hydraulic system holds 140 liters. Torque tables deliver exact tightening values for metric bolts, flared nuts, and split flange bolts to ensure structural integrity during assembly. Additional technical sections cover track tension grease requirements, wire rope load limits, and metric-to-imperial conversion tables.

Heavy equipment maintenance involves significant physical risks. Always reference the complete OEM specifications and follow standard shop safety protocols before performing any diagnostics or physical adjustments.