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NOTE:
This manual contains information necessary for the
maintenance and repair of hydraulic excavators. It is
categorized into seven chapters: Specification, Mainte-
nance, System, Disassembly, Troubleshooting, Engine
and Installation Procedures for Optional Attachment.
• The Chapter "Specification" describes the specifi-
cations for the entire machine and replacement and
repairing of attachments.
• The Chapter "Maintenance" contains material for
service and adjustment of the entire machine.
• The Chapter "System" describes the operating sys-
tem, including the hydraulic system, electric sys-
tem, components, etc.
• The Chapter "Disassembly" describes the removal
and installation of assemblies mounted on the up-
per structure and undercarriage, and the assem-
bling and disassembling of the associated hydraulic
equipment.
• The Chapter "Troubleshooting" describes how to
find the faults in equipment.
• The Chapter "Engine" contains the complete "Main-
tenance Manual" provided by the engine supplier.
• The Chapter "Installation Procedures for Optional
Attachment" describes the supplements added on
request as required.
This Manual may be revised due to the improvement of
products, modification of specifications, etc. There may
be cases where the system on the actual machine may
differ with the manual - this may be due to variation of
specifications by countries. Contact your local distribu-
tor if you need clarification.
When ordering replacement or service parts, refer to
the most recent Parts Catalog for the machine to get
the correct replacement/service part number.
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