Target Audience:
Owners, operators, and technicians of Hitachi construction equipment
Machine Type:
Hydraulic excavator in the 20-ton class
Advantage:
Provides comprehensive factory procedures for service and repair
Highlight:
Covers both standard and reduced tail swing models
Engine:
Detailed service procedures for the engine system
Hydraulic System:
Hydraulic pump, controls, cylinders, and attachments
Power Train:
Transmission, final drives, and axles
Undercarriage:
Track frame, rollers, idlers, and sprockets
Electrical System:
Wiring diagrams, sensors, switches, and electronic controllers
Air Conditioning:
Heating and air conditioning system
Attachments:
Boom, arm, bucket, and quick coupler
Disassembly and Assembly:
Step-by-step instructions for major components
Inspection:
Inspection and measurement standards
Testing:
Performance testing procedures for systems
Diagnostics:
Troubleshooting and diagnostic codes
Torque Specs:
Detailed torque values for fasteners
Clearances:
Specified clearances and tolerances
Fluid Capacities:
Capacities for all fluids
Special Tools:
Required special tools listed where applicable
Parts Reference:
Includes parts identification and reference numbers
File Type:
PDF (Portable Document Format)
Compatibility:
Works on Windows, Mac, Linux, iOS, Android
Requirements:
PDF reader software
Searchability:
Text searchable and indexable
Resolution:
High-resolution scanned pages for clarity
Printing:
Can be printed for workshop use
Binding Type:
Digital (no physical binding)
Paper Type:
N/A - digital product
Overall Length:
Approximately 9.5 m (without bucket)
Overall Width:
Approximately 3.2 m (without tracks)
Overall Height:
Approximately 3.0 m (to top of cab)
Tail Swing Radius:
225US: standard; 225USR: reduced tail swing
Curb Weight:
Operating weight approximately 23,500 kg (depending on configuration)
Operator Protection:
ROPS/FOPS certified cab (if equipped)
Visibility:
Large windows and optional mirrors for visibility
Warning System:
Travel alarm and backup lights
Emergency Stops:
Engine shutdown switches accessible from ground
Crash Test:
N/A - not applicable for construction equipment
Engine Oil:
Every 250 hours
Hydraulic Oil:
Every 2,000 hours
Final Drive Oil:
Every 1,000 hours
Air Filter:
Clean as needed; replace annually
Engine Oil:
API CI-4 or higher, SAE 15W-40
Hydraulic Oil:
ISO VG 46 anti-wear hydraulic oil
Coolant:
Ethylene glycol based, long-life
Common Wear Items:
Track components, bucket teeth, hydraulic hoses, swing bearing
Common Issues:
Electrical wiring corrosion in older units; hydraulic leaks at fittings
Manufacturer:
Hitachi Construction Machinery Co., Ltd.
Heritage:
Founded in Japan, known for durable hydraulic excavators
Series:
Part of the Zaxis series, succeeding the Super EX series
In This Generation:
Introduced improvements in power, comfort, and reduced emissions over prior models
Location:
Manufactured in Japan and possibly other plants
