This collection contains the following 3 manuals:
Komatsu GD555-3A workshop manual
Komatsu GD555-3A operation and maintenance manual
Komatsu 102 series engine shop manual.

Manual descriptions:

Komatsu 102 series engine shop manual. This is the factory manual,980 pages.
This manual covers following model engines.
4D102E-1
S4D102E-1
6D102E-1
S6D102E-1
SA6D102E-1
SAA4D102E-2
SAA6D102E-2.

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. Functions of components are also explained.

Komatsu GD555-3A workshop manual. This is a factory manual. 680 pages.
serial number. GD555-3A 10001 and up

CONTENTS
01 GENERAL
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD.
20 TESTING AND ADJUSTING
30 DISASSEMBLY AND ASSEMBLY
40 OTHERS

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 GD555-3A operation and maintenance manual.
Serial number GD555-3A-11001 and up.
Pages 259

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.