Hitachi EX120-5 Excavator Workshop Manual

Hitachi EX120-5 workshop manual provides detailed service, repair and maintenance information for the Hitachi EX120-5 hydraulic excavator. This comprehensive 554-page manual is suitable for professional mechanics, service technicians, engineers and machine owners carrying out routine maintenance, fault diagnosis, component repair or major workshop overhauls.

The Hitachi EX120-5 workshop manual contains practical procedures covering the excavator’s main mechanical, hydraulic and electrical systems. Detailed instructions help users correctly inspect, remove, dismantle, repair, adjust, reassemble and reinstall important machine components.

This manual is especially useful when completing scheduled servicing, investigating operating faults or rebuilding major assemblies. Following the manufacturer’s recommended repair procedures can help prevent incorrect adjustment, unnecessary parts replacement and damage during dismantling or reassembly.

Information covered within the manual may include:

• General machine specifications and technical data
• Workshop safety precautions
• Service standards and repair information
• Upperstructure inspection and repair
• Main frame and counterweight components
• Operator’s cab and control assemblies
• Boom, arm and bucket components
• Pins, bushes and linkage assemblies
• Undercarriage and track-system servicing
• Track rollers, carrier rollers and idlers
• Recoil units and track-adjustment components
• Travel motors and final drives
• Swing motor and swing-device servicing
• Hydraulic pump removal and repair
• Main control valve servicing
• Hydraulic cylinders and seal replacement
• Pilot-control system repairs
• Hydraulic pipes, hoses and fittings
• Hydraulic pressure testing and adjustment
• Engine installation and related systems
• Fuel, cooling, intake and exhaust systems
• Electrical-system testing
• Starting and charging systems
• Wiring, switches, relays and sensors
• Machine monitoring and control components
• Component removal and installation
• Dismantling and reassembly procedures
• Inspection measurements and service limits
• Tightening torques and adjustment specifications
• Performance testing and troubleshooting
• Routine maintenance and inspection procedures

The hydraulic sections provide essential information for diagnosing faults such as slow operation, weak digging performance, incorrect attachment movement, travel problems, swing faults, overheating or unusual hydraulic noise. The manual helps technicians inspect and repair the hydraulic pump, control valve, cylinders, motors and pilot-control components.

Mechanical repair procedures cover the undercarriage, working equipment, travel assemblies, swing system and other major components. Correct measurements, service limits and tightening torques are important during professional repairs, and this manual provides the technical information required for accurate workshop work.

Electrical information supports fault tracing within the starting, charging, monitoring and control systems. Testing procedures can help locate damaged wiring, poor connections, faulty switches, relays, sensors, solenoids or other electrical components before replacement.

The Hitachi EX120-5 workshop manual is a valuable reference for routine servicing, hydraulic diagnosis, electrical troubleshooting and major repair work. Its detailed 554-page content provides the information needed to help maintain safe, reliable and efficient excavator operation.

Manual details:

Manufacturer: Hitachi
Model covered: EX120-5
Machine type: Hydraulic excavator
Manual type: Workshop service and repair manual
Number of pages: 554
Format: Digital PDF manual
Language: English

This digital workshop manual can be viewed on a computer, laptop, tablet or suitable mobile device. Selected pages may also be printed for convenient workshop use.

After purchase, an instruction PDF is available through the order download. The complete Hitachi EX120-5 workshop manual will then be supplied digitally using a secure Filemail download link.

Please check that your excavator model matches the Hitachi EX120-5 before ordering. The model and serial identification details can normally be found on the machine identification plate.