This collection contains the following 3 manuals:
Komatsu PC55MR-3 & PC45MR-3 Shop manual
Komatsu PC55MR-3 & PC45MR-3 Operation and maintenance manual
Komatsu PC55MR-3 parts manual

Descriptions and serial number ranges below

Komatsu PC55MR-3 and PC45MR-3 shop manual.
Model and serial number range.
PC55MR-3 15001 and up.
PC45MR-3 5001 and up.
This is a high quality factory PDF.
Pages 572
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 cockups. All specifications and
tolerances are listed. Functions of components and systems
are also explained.

Komatsu PC55MR-3 & PC45MR-3 Operation and maintenance manual.
Pages 287
Model and serial number range
PC45MR-3 6243 and up
PC55MR-3 16609 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 PC55MR-3 parts manual. s/n 15001-up
Pages 860.
This is a fully illustrated parts list with exploded views.
It can be a very helpful tool to assist your mechanic with disassembly and assembly.