This collection contains the following 3 manuals:

Komatsu 6D125-1,S6D125-1 shop manual. This is a high quality 424 page engine workshop service manual.
This factory engine service manual has easy-to-read text
sections with top quality diagrams, pictures and
illustrations. The step by step instructions show you how to
complete any repair or overhaul, correctly and efficiently,
saving time and avoiding cockups. All specifications and
tolerances are listed. Function of components and systems are
also explained.

The majority of Komatsu machine shop manuals do not include a
full engine workshop manual. Most have limited engine
information. This engine shop manual is required for complete
knowledge of this engine, systems, components, functions,
specifications, tolerances and methodology of disassembly
and assembly.

Komatsu PC400-5, PC400LC-5,PC400HD-5 workshop manual.
Pages 713
Model and serial number ranges
PC400-5 20001 and up
PC400-5 mighty 20603 and up
PC400LC-5 20001 and up
PC400LC-5 mighty 20603 and up
PC400HD-5 20603 and up
This factory service manual has easy-to-read text sections
with top quality diagrams, pictures and illustrations. The
step by step instructions show you how to fault find or
complete any repair or overhaul, correctly and efficiently,
saving time and avoiding costly mistakes. All specifications
and tolerances are listed. Functions of components and
systems are also explained.

Komatsu PC400-5, PC400LC-5 operation and maintenance manual.
Pages 255
serial number range
PC400-5 s/n 20603 and up
PC400LC-5 s/n 20603 and up
This operation and maintenance manual provides essential
information with regard to the operation and maintenance
of this machine. Careful handling, correct periodical
inspections and maintenance. This manual should always
be present with machine.