This collection contains the following 2 manuals
Komatsu PC128US-2 shop manual.
Komatsu PC128US-2 operation & maintenance manual
Manual descriptions:

Komatsu PC128US-2 and PC138USLC-2 operation and maintenance manual. This high quality (283 pages) manual covers following serial numbered machines.
PC128US-2 s/n 8269 and up
PC138USLC-2 s/n 1047 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.

Komatsu PC128US-2 shop manual. This is a high quality factory manual 1028 pages.
Model and serial number ranges
PC128US-2 s/n 5001 to 7730 avance.
PC128US-2 s/n 7731 and up GALEO

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.