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NOTE:
This Manual is prepared as technical material in which
the information necessary for the maintenance and re-
pairing services of our hydraulic excavators are collect-
ed, and is categorized into 7 Chapters, Specification,
Maintenance, System, Disassembly, Troubleshooting,
Engine, and Installation Procedures for Optional At-
tachment.
• The Chapter "Specification" describes the specifi-
cations for entire machine and material, which are
instructive for replacement and repairing of attach-
ments.
• The Chapter "Maintenance" describes the material,
which is helpful for maintenance service and adjust-
ments for entire machine.
• The Chapter "System" describes the operating sys-
tem like hydraulic system, electric system, compo-
nents, and so on.
• The Chapter "Disassembly" describes the removal
and installing of an assembly mounted on the upper
structure and undercarriage, and the assembling
and disassembling of the associated hydraulic
equipment.
• The Chapter "Troubleshooting" describes how to
find the equipment fault.
• The Chapter "Engine" describes the engine, mak-
ing use of the "Maintenance Manual" provided by
the suppliers.
• The Chapter "Installation Procedures for Optional
Attachment" describes the supplements added on
request as required.
This Manual may be properly revised due to the im-
provement of products, modification of specifications,
etc. And there are cases where the system on actual
machine and a part of the contents of this manual may
differ due to the variations of specification by countries.
For the section in which the description is hardly under-
stood, contact our distributor.
A number is assigned to every part handled in this Man-
ual on account of the description, but the parts cannot
be supplied as service parts. Therefore, the order must
be placed with respective formal number with due con-
firmation on the Parts Manual for the applicable ma-
chine.
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