1988-1995 Komatsu Excavator PC300-5 / PC400-5 Shop Manual

Komatsu PC300-5 and PC400-5 Shop Manual Documentation

• Covers 1988–1995 Komatsu PC300-5 and PC400-5 series hydraulic excavators, including LC, HD, MIGHTY, and Loading Shovel variants
• Original OEM publication CEBM207077, documenting technical standards for the 1988–1995 era builds
• Contains 50+ component-level exploded-view diagrams, extensive hydraulic circuit schematics, and comprehensive torque-specification tables
• Downloads to your account within seconds of checkout
• Permanent availability in your purchase account — no re-buy required
• Laid out for standard letter and A4 printing
• Full-text search finds any part number in seconds
• This 748-page manual documents the specific technical standards for the PC300 and PC400 series, including unique loading shovel assembly and variable-gauge track frame data

Technical Content Walkthrough

The Komatsu PC300-5 and PC400-5 shop manual provides detailed technical data regarding the structure and function of major excavator systems. Coverage spans the powertrain components, including final drive reduction ratios and swing machinery configurations, alongside the hydraulic circuit architecture for both standard and loading shovel models. The document further details the OLSS (Open Center Load Sensing System), cut-off controls, and pump-flow control logic. Additional chapters provide deep insight into the internal assembly of servo valves, the TVC valve, and the CO/NC valve assemblies for the front and rear main pumps.

Specification and Reference Data

Technical data previews include lubrication requirements, fluid capacities, and torque settings for standard bolts and split flange bolts. The text provides tables for converting metric units to standard imperial measurements for weight, volume, and pressure. Hydraulic tank capacities are listed at 315 liters for the PC300 series and 358 liters for the PC400 series. Standard shoe specifications document link pitches of 203 mm or 216 mm depending on the model. Reference only — always consult a certified technician before performing service on this equipment. Understanding factory workshop documentation is vital for proper maintenance of this heavy machinery.

An official 748-page Komatsu OEM shop manual covering the 1988–1995 PC300-5 and PC400-5 hydraulic excavator series, documenting hydraulic circuit, powertrain, and assembly specifications for the various LC, HD, and MIGHTY configurations.