Hitachi EX120-2 Excavator Operator Manual
Hitachi Ex120-2 Excavator Parts Catalog Manual Download
The Hitachi EX120-2 Excavator Operator Manual is an essential reference designed for owners, operators, mechanics, and fleet managers who need accurate operating procedures, maintenance intervals, and machine safety instructions for the Hitachi EX120-2 hydraulic excavator.
This Hitachi EX120-2 Workshop Repair Manual delivers factory-grade information for efficient equipment management, reducing downtime while ensuring correct operation of hydraulic systems, engine components, undercarriage assemblies, and electrical circuits.
Unlike generic manuals, the official operator manual provides model-specific guidance created directly for the EX120-2 platform.
What Is Included in the Hitachi EX120-2 Operator Manual PDF?
When purchasing or downloading the Hitachi EX120-2 operator manual, users gain access to a comprehensive PDF document covering all major systems and operating procedures.
Manual Contents: Hitachi EX120-2 Excavator Operator Manual
- General machine specifications
- Safety precautions and warning labels
- Operator controls and dashboard functions
- Starting and shutdown procedures
- Cold weather operation instructions
- Fueling guidelines
- Lubrication points
- Hydraulic oil recommendations
- Daily inspection checklist
- Periodic maintenance schedules
- Excavator attachment operation
- Travel motor usage instructions
- Boom, arm, and bucket control procedures
- Troubleshooting common issues
- Storage recommendations
Hitachi EX120-2 Machine Specifications
Below are the primary technical specifications commonly referenced by operators and maintenance teams.
| Specification | Details |
|---|---|
| Model | Hitachi EX120-2 |
| Machine Type | Hydraulic Excavator |
| Engine | Isuzu Diesel Engine |
| Operating Weight | Approx. 12,000 kg |
| Bucket Capacity | 0.45 – 0.52 m³ |
| Travel Speed | 3.2 – 5.5 km/h |
| Hydraulic System | Variable displacement pump |
| Fuel Tank Capacity | Approx. 250 L |
| Engine Output | Approx. 80 HP |
These specifications may vary depending on configuration and regional equipment packages.
Why Operators Need the EX120-2 Manual
Heavy equipment operation without the correct documentation increases maintenance costs and risk of operator error.
The Hitachi EX120-2 manual PDF helps users:
Improve Equipment Safety
Operators can follow manufacturer-approved procedures for:
- Safe startup
- Proper shutdown
- Emergency stop operation
- Swing lock procedures
- Hydraulic lockout
Reduce Maintenance Errors
Following official lubrication intervals and service charts prevents:
- Premature pump wear
- Engine overheating
- Hydraulic contamination
- Undercarriage failure
Increase Machine Lifespan
Routine servicing based on official schedules protects:
- Final drives
- Swing bearing
- Hydraulic cylinders
- Cooling systems
- Fuel injection systems
Daily Inspection Checklist for Hitachi EX120-2
Before starting the machine, operators should inspect all critical systems.
Pre-Operation Checklist
- Check engine oil level
- Inspect coolant reservoir
- Check hydraulic oil sight gauge
- Drain water separator
- Inspect battery terminals
- Verify track tension
- Inspect bucket teeth
- Check grease points
- Test horn and lights
- Inspect hoses for leaks
Hitachi EX120-2 Maintenance Schedule
Routine maintenance is essential for maximum excavator performance.
Every 10 Hours
- Walk-around inspection
- Drain water separator
- Check fluid levels
Every 50 Hours
- Lubricate bucket linkage
- Inspect air filter
Every 250 Hours
- Change engine oil
- Replace oil filter
Every 500 Hours
- Replace fuel filters
- Check alternator belt tension
Every 1000 Hours
- Replace hydraulic return filter
- Inspect hydraulic pumps
Every 2000 Hours
- Replace hydraulic oil
- Flush cooling system
Hitachi EX120-2 Excavator Operator Manual
Common Hitachi EX120-2 Troubleshooting Issues
The operator manual includes troubleshooting procedures for common excavator faults.
Engine Will Not Start
Possible causes:
- Dead battery
- Air in fuel lines
- Faulty starter relay
- Low fuel pressure
Weak Hydraulic Performance
Possible causes:
- Low hydraulic oil
- Dirty suction strainer
- Pump wear
- Relief valve malfunction
Overheating Engine
Possible causes:
- Dirty radiator core
- Low coolant
- Fan belt failure
- Thermostat malfunction
Slow Travel Speed
Possible causes:
- Travel motor wear
- Low pump output
- Brake drag
- Pilot pressure issue
