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

Covers PC300-5, PC300LC-5, PC300HD-5, PC400-5, PC400LC-5, and their Mighty variants. Includes detailed procedures for maintenance, troubleshooting, disassembly, and assembly. Ref: CEBM207077

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Document Details

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Document Number / Seller:
28434 / Kathleen Boyd
File Size:
48.91 MB
File Type:
PDF
Language:
English
Pages:
748
Printable:
Yes
Category:
Excavator
Last updated / verified
Dec 20, 2025

Models Covered & Key Technical Specifications

1988-1995 Komatsu Excavator PC300-5 / PC400-5 Operation & Maintenance Manual Covers PC300-5, PC300LC-5, PC300LC-5K, PC300HD-5, PC300-5 MIGHTY, PC300LC-5 MIGHTY, PC400-5, PC400LC-5, PC400HD-5, PC400LC-5 MIGHTY, PC400-5 Loading Shovel, PC400LC-5 Loading Shovel.

  • Established DPI Rating: 1200 dpi establishes the maximum print output Architecture.
  • Reference Fastening Values: For optimal operation, 15-30C defines the environmental limit Framework.
  • Certified Fluid Capacity: 450 W -- signifies the active printing consumption Threshold.
  • Factory Integral Capacity: The formatter board requires 64 MB for standard operation Logic.
  • Integral Cooling Specs: Maximum throughput reaches 25 ppm Parameters.
  • Specific Resolution Data: 748 pages documents the complete set of specifications Standards.

Manual Description & Preview

Advanced Installation Assembly Manual: Excavator Komatsu PC300-5, PC300LC-5, PC300LC-5K, PC300HD-5, PC300LC-5 MIGHTY, PC400-5, PC400LC-5, PC400HD-5, PC400LC-5 MIGHTY Excavator Operation & Maintenance Manual Parts-Reference

Reference-Category: Excavator // Operational-Scope: PC300-5, PC300LC-5, PC300HD-5, PC400-5, PC400LC-5, PC400-5 Loading Shovel, PC400LC-5 Loading Shovel // Conceptual-Layout: Hydraulic, Electrical, Engine, Powertrain, Systems Logic

Providing a structural breakdown of the following:

  • Engine Automatic Warming-up and Overheat Prevention System
  • Swing Control System
  • Travel Control System
  • Pump Control System

Consistently demanding the highest level of system performance, this manual details the essential components and their systematic integration within the hydraulic and electrical systems.

Repairs are simplified through detailed diagrams and systematic procedures, ensuring a thorough understanding of all mechanical assemblies.

This comprehensive document also details the proper application and maintenance of all components for optimal machine performance and longevity.

Metric Value Context
Machine Model PC300-5, PC300LC-5, PC400-5, PC400LC-5 Excavator Units
Serial Numbers 20001 and up, 20603 and up Reference Data
Specification 748 Pages Document Size
File Size 48.9094 MB Digital Storage Media
Language English Manual Content Language
File Type PDF Document Format

Specifications: Tank capacity: 315 Q, Oil amount: 195 Q. Relief set pressure: 0.4 ± 0.07 kg/cm², Suction set pressure: 0.04 ± 0.01 kg/cm², Bypass valve set pressure: 1.05 ± 0.2 kg/cm², Check valve set pressure: 1.76 kg/cm².

FAQ

What **tools** are required for adjustment procedures? keyboard_arrow_down

300 kg/cm² is the maximum rated pressure for the Governor motor.

Identify the **critical** pressure specifications. keyboard_arrow_down

0.4 ± 0.07 kg/cm² is the relief set pressure for the Breather.

What **procedures** are required for assembly sequences? keyboard_arrow_down

32.3 cc/rev is the theoretical delivery for the Charging Pump.

Determine the **specified** service interval parameters. keyboard_arrow_down

1,250 rpm is the set speed for the engine, with a 100 rpm reduction during auto-deceleration.

What **specifications** are essential for system architecture? keyboard_arrow_down

325 kg/cm² is the main relief valve pressure for the 2-stage relief function.

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