2002 Komatsu PC400-6, PC400LC-6, PC450-6, PC450LC-6 Shop Manual

Komatsu PC400, PC400LC-6, PC450 & PC450LC-6 troubleshooting and repair reference for 2002 models. Includes diagrams and specifications. Ref: SEBM014507.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Komatsu Models Covered & Key Technical Specifications

Models: Komatsu PC400-6, PC400LC-6, PC450-6, PC450LC-6
Sub-models / Variants: Back Hoe, Loading Shovel
Build Years: 2002
Serial Numbers: PC400-6 32001 and up, PC400LC-6 32001 and up, PC450-6 12001 and up, PC450LC-6 12001 and up
Technical Data:

  • Engine model: Komatsu SA6D125-2
  • Engine type: 4-cycle, water-cooled, in-line, vertical, direct injection, turbocharger with aftercooler
  • Engine displacement: 11.040 liters
  • Flywheel horsepower: 228 kW (305.7 HP) at 2,050 RPM
  • Max torque: 1,213 Nm (123.7 kgm) at 1,400 RPM
  • Operating weight (PC400-6/PC400LC-6): 41,400 kg / 42,600 kg
  • Operating weight (PC450-6/PC450LC-6): 42,240 kg / 43,500 kg
  • Hydraulic pump: HPV160+160 variable displacement piston type x 2
  • Hydraulic pressure (main): 34.8 MPa (355 kg/cm2)
Technical Specifications
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Document Number / Seller:
28435 / Donna Reyes
File Size:
44.50 MB
File Type:
PDF
Language:
English
Pages:
892
Printable:
Yes
Category:
Excavator
Last updated / verified
Dec 20, 2025

Komatsu Manual Features & Content Preview

2002 Komatsu PC400-6, PC450-6 Excavator Service Manual

  • Covers 2002 Komatsu PC400-6, PC400LC-6, PC450-6, and PC450LC-6 series excavators in both Back Hoe and Loading Shovel configurations
  • Official Komatsu publication SEBM014507, published February 2002
  • Contains 47 detailed hydraulic system diagrams, 16 standard torque tables for metric bolts and split flange connections, and comprehensive weight distribution charts for major components
  • File delivered as a direct download the moment payment clears
  • Indexed PDF search covers every chapter and appendix
  • Documents the 125-2 series engine performance, hydraulic pump operation, and swing machinery function for the listed serial number ranges
  • This technical manual provides the reference data necessary for servicing the SA6D125-2 engine platform and associated hydraulic architecture

Component Structure and Technical Scope

This 2002 Komatsu PC400-6 and PC450-6 shop manual documents the mechanical and hydraulic structure of these heavy-duty machines. Chapters outline the architecture of the power train, including the travel motors, swing circle, and final drive gear reduction ratios. The documentation describes the functional logic of the hydraulic pump assemblies, focusing on the variable displacement piston type setup, the TVC and LS valves, and the signal pressure routing. Detailed illustrations clarify the routing of hydraulic piping for both the back hoe and loading shovel attachments, including service valve integration and PPC control layouts.

Technical Data and Specifications

The 2002 Komatsu PC400-6 hydraulic tank capacity is 358 liters, with 273 liters contained at the H level. Main pump delivery pressure is specified at 34.8 MPa, serving the hydraulic requirements of the primary 6-spool control valve assembly. The SA6D125-2 engine produces 228 kW of flywheel power at 2,050 RPM as documented in the engine performance tables. Standard tightening torque for a 16 mm metric bolt is listed at 279 Nm in the how factory workshop documentation is structured tables. Engine oil pan capacity is documented at 38 liters for specified fill requirements. This publication provides the core specifications and structural data for the 2002 Komatsu PC400-6 through PC450-6 series, serving as a primary reference for serial numbers 32001 and 12001 and above.

Document Reference: SEBM014507, February 2002

Manual FAQ, Purchase & Download Details

Does this manual include technical reference tables for standard tightening torques on bolts and nuts? keyboard_arrow_down

Manual includes comprehensive tables that list standard tightening torque values for various bolt diameters.

What information is provided regarding the identification of revision cycles in this document? keyboard_arrow_down

Document lists revised pages next to the table of contents. Edition marks are recorded at the bottom of the pages to indicate version status.

Which chapters or sections are included in this shop manual for the Komatsu excavator series? keyboard_arrow_down

Document contains detailed chapters covering general information, structure and function, testing and adjusting, disassembly and assembly, and maintenance standards. Each section is further organized by component groups to assist with locating technical data. The material is designed as a reference for service workshop operations.

Can you confirm if the PC400-6, PC400LC-6, PC450-6, and PC450LC-6 models are covered in this manual? keyboard_arrow_down

Shop manual is titled for the Komatsu PC400 and PC450 series and specifically includes these machine models.

Is there guidance in the document regarding the application of specific coating materials? keyboard_arrow_down

Manual lists various adhesives, gasket sealants, and lubricants alongside their recommended applications and features. These tables provide a reference for selecting the appropriate materials for different assembly needs.

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