This collection contains the following 3 manuals:
Komatsu D65E-12,D65P-12,D65EX-12,D65PX-12 workshop manual
Komatsu S6D125-2,SA6D125-2,SAA6d125-2 shop manual
Komatsu 6D125-1,S6D125-1 shop manual

I have included 2 x engine manuals as the D65-12 was fitted with both the -1 and -2 engines.

Manual descriptions as follows.

Komatsu D65E-12 workshop manual. This is the factory manual,1227 pages.
MACHINE MODEL SERIAL NUMBER RANGE
D65E-12 60001 and up
D65P-12 60001 and up
D65EX-12 60001 and up
D65PX-12 60001 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 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.

Komatsu S6D125-2,SA6D125-2,SAA6d125-2 shop manual.
Pages 392
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.