This collection contains the following 2 manuals.
Komatsu 170-3 series (6aa6D170E-3) shop manual
Komatsu PC1250-7 shop manual

Manual descriptions:

Komatsu PC1250-7 workshop manual.
This manual covers following machines.
MACHINE MODEL SERIAL NUMBER RANGE
PC1250-7 20001 and up
PC1250SP-7 20001 and up
PC1250LC-7 20001 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.
This is the factory shop manual. 940 pages. This is a high
quality PDF.

Komatsu 170-3 series diesel engine shop manual. This is the factory shop manual, it is a high quality PDF. 430 pages.
The 170-3 series covers following model engines
SA6D170E-3
SAA6D170E-3

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.

These engines are used in following model machines
SA6D170E-3
D375A-5 Bulldozer

SAA6D170E-3
PC1250-7 Hydraulic excavator
WA600-3 Wheel loader
WD600-3 Wheel dozer
HD465-7 Dump truck
HD605-7 Dump truck