2000 Komatsu PC128UU-1 / PC128US-1 Shop Manual

Technical Scope for the 2000 Komatsu PC128UU-1 and PC128US-1 Shop Manual

• Built for owners and professional workshops servicing the 2000 Komatsu PC128UU-1 and PC128US-1 excavators, covering system diagnostics, disassembly, and maintenance standards for the S4D102E-1 engine variant
• Original OEM publication P/N SEBM009805, printed in Japan August 2000
• Contains over 400 exploded-view diagrams, 15 detailed hydraulic circuit schematics, and 10+ standard torque specification tables for metric bolts and flared nuts
• Downloads to your account within seconds of checkout
• OCR text layer lets you jump to a torque spec by keyword
• Suitable for printing individual sections for shop-floor use
• Permanent availability in your purchase account — no re-buy required
• This edition provides the definitive assembly data and maintenance clearance standards for the 2347 and 1715 serial-number-and-up production range

System Structure and Function

The 2000 Komatsu PC128UU-1 manual documents the internal architecture of major machine systems, including the radiator and oil cooler, the power train, and the swing circle assembly. It illustrates the logic of the closed-center load-sensing (CLSS) system, detailing how the variable displacement pump, PC valve, and LS valve function in compound operations. The text describes how hydraulic oil flows through the control valve, detailing individual spool functions for the boom, arm, bucket, and offset movements.

Specification and Technical Data Preview

This publication includes detailed hydraulic pressure settings, such as the unload valve relief at 2.45 MPa (25 kg/cm²) and main relief valve set pressures up to 34.8 MPa (355 kg/cm²). Maintenance data for the S4D102E-1 engine includes fluid capacities and lubrication requirements across various ambient temperatures. Engine oil pan capacity is documented at 13.5 liters, while the hydraulic system holds 140 liters. Torque tables provide tightening values for metric bolts, flared nuts, and split flange bolts to ensure structural integrity during assembly. Additional data includes track tension grease requirements, wire rope load limits, and conversion tables for metric to imperial units. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. An official 794-page Komatsu OEM shop manual covering the 2000 PC128UU-1 and PC128US-1, documenting engine, hydraulic, chassis, and electrical specifications for the serial-number-specific S4D102E-1 engine build.